Pub Date : 2016-10-25DOI: 10.1080/24699322.2016.1240305
Taeyoung Choi, S. Chin
Abstract Recently, people have paid more attention to skin that seems determine age, beauty and appearance. In particular, acne scar that tends to grow in young generation. Synthetic model can help to prevent them to care beforehand. This study proposes a representation for acne scars and general scars using a height map and an improved subsurface scattering color model. In consideration of the geometric properties of acne scars classified into ice pick, rolling and boxcar, a height map is used. Where the improved subsurface scattering color model and shading are applied, convenient system interfaces are provided to represent wounds and scars conveniently. An automation function is added for the user to control the height map, as well as four shading functions comparable with the shading function proposed in this study. In addition, a user study is performed to validate the proposed method.
{"title":"Acne scar and scar synthesis system using height map and improved subsurface scattering color model","authors":"Taeyoung Choi, S. Chin","doi":"10.1080/24699322.2016.1240305","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240305","url":null,"abstract":"Abstract Recently, people have paid more attention to skin that seems determine age, beauty and appearance. In particular, acne scar that tends to grow in young generation. Synthetic model can help to prevent them to care beforehand. This study proposes a representation for acne scars and general scars using a height map and an improved subsurface scattering color model. In consideration of the geometric properties of acne scars classified into ice pick, rolling and boxcar, a height map is used. Where the improved subsurface scattering color model and shading are applied, convenient system interfaces are provided to represent wounds and scars conveniently. An automation function is added for the user to control the height map, as well as four shading functions comparable with the shading function proposed in this study. In addition, a user study is performed to validate the proposed method.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"175 - 182"},"PeriodicalIF":2.1,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240305","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60126151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-25DOI: 10.1080/24699322.2016.1240296
Guojun Niu, Bo Pan, Yue Ai, Yili Fu
Abstract Background: Minimally invasive surgery (MIS) based on computer and robot-assisted technology is becoming more and more popular. Methods: Intuitive motion control implemented by kinematic algorithm of the slave manipulator based on the 3D Display (DD) is proposed to eliminate absonant hand-eye coordination, kinematic dissimilarity and workspace mismatch of the master-slave manipulator and is applied in the novel minimally invasive surgical (MIS) robot developed in our lab. Forward and inverse kinematics of MIS robot are analyzed based on the screw theory. The kinematic algorithm of MIS robot based on the DD is achieved. Results: The trajectory tracking results that the movement trends between the master and slave manipulators consistently validate the effectiveness of forward and inverse kinematics. The simulation results of the kinematic algorithm by virtue of Simulink and SimMechanics sub-modules of the MATLAB and intuitive control experiment that the root mean square error of cumulative position increments is less than 0.5 mm validate effectiveness of intuitive control algorithm. Conclusion: Successful animal experiments furthermore validate the effectiveness of intuitive control algorithm.
{"title":"Intuitive control algorithm of a novel minimally invasive surgical robot","authors":"Guojun Niu, Bo Pan, Yue Ai, Yili Fu","doi":"10.1080/24699322.2016.1240296","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240296","url":null,"abstract":"Abstract Background: Minimally invasive surgery (MIS) based on computer and robot-assisted technology is becoming more and more popular. Methods: Intuitive motion control implemented by kinematic algorithm of the slave manipulator based on the 3D Display (DD) is proposed to eliminate absonant hand-eye coordination, kinematic dissimilarity and workspace mismatch of the master-slave manipulator and is applied in the novel minimally invasive surgical (MIS) robot developed in our lab. Forward and inverse kinematics of MIS robot are analyzed based on the screw theory. The kinematic algorithm of MIS robot based on the DD is achieved. Results: The trajectory tracking results that the movement trends between the master and slave manipulators consistently validate the effectiveness of forward and inverse kinematics. The simulation results of the kinematic algorithm by virtue of Simulink and SimMechanics sub-modules of the MATLAB and intuitive control experiment that the root mean square error of cumulative position increments is less than 0.5 mm validate effectiveness of intuitive control algorithm. Conclusion: Successful animal experiments furthermore validate the effectiveness of intuitive control algorithm.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"101 - 92"},"PeriodicalIF":2.1,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60125904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-25DOI: 10.1080/24699322.2016.1240297
Youngjoo Cha, Megan Stanley, T. Shurtleff, J. H. You
Abstract Background: Dynamic postural instability is a common neuromuscular impairment in cerebral palsy (CP), which often includes balance dysfunction and an associated risk of serious falls. Robotic hippotherapy has recently become a widespread clinical application to facilitate postural core stabilization, strength, and endurance through repetitive vestibular and proprioceptive stimulation to the spine via the sensorimotor system pathways. However, the long-term effects of robotic hippotherapy on dynamic postural instability in CP remain unclear. Objective: To examine the long-term effects of robotic hippotherapy on dynamic postural stability in CP. Methods: An advanced three-dimensional biomechanical eight-camera video motion capture (VMC) system was used to compute the center of mass (COM) pathway, which represents intervention-related spinal core instability. The robotic hippotherapy system was used to improve dynamic postural stability and associated balance performance. Robotic hippotherapy exercise was provided for 45 minutes/session, 2–3 times a week over the 12-week period. Results: Abnormal mean COM pathway length, standard deviation, and range substantially decreased after 12 weeks of robotic hippotherapy. The initial x-axis COM was greater than that of the y-axis. However, the amount of abnormal anterior–posterior and medio-lateral postural sway substantially decreased after robotic hippotherapy. Conclusions: This study provides the first compelling evidence that the robotic hippotherapy is safe and effective for postural instability control and sitting balance dysfunction that mitigates the risk of falls in CP.
{"title":"Long-term effects of robotic hippotherapy on dynamic postural stability in cerebral palsy","authors":"Youngjoo Cha, Megan Stanley, T. Shurtleff, J. H. You","doi":"10.1080/24699322.2016.1240297","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240297","url":null,"abstract":"Abstract Background: Dynamic postural instability is a common neuromuscular impairment in cerebral palsy (CP), which often includes balance dysfunction and an associated risk of serious falls. Robotic hippotherapy has recently become a widespread clinical application to facilitate postural core stabilization, strength, and endurance through repetitive vestibular and proprioceptive stimulation to the spine via the sensorimotor system pathways. However, the long-term effects of robotic hippotherapy on dynamic postural instability in CP remain unclear. Objective: To examine the long-term effects of robotic hippotherapy on dynamic postural stability in CP. Methods: An advanced three-dimensional biomechanical eight-camera video motion capture (VMC) system was used to compute the center of mass (COM) pathway, which represents intervention-related spinal core instability. The robotic hippotherapy system was used to improve dynamic postural stability and associated balance performance. Robotic hippotherapy exercise was provided for 45 minutes/session, 2–3 times a week over the 12-week period. Results: Abnormal mean COM pathway length, standard deviation, and range substantially decreased after 12 weeks of robotic hippotherapy. The initial x-axis COM was greater than that of the y-axis. However, the amount of abnormal anterior–posterior and medio-lateral postural sway substantially decreased after robotic hippotherapy. Conclusions: This study provides the first compelling evidence that the robotic hippotherapy is safe and effective for postural instability control and sitting balance dysfunction that mitigates the risk of falls in CP.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"111 - 115"},"PeriodicalIF":2.1,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240297","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60125960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-25DOI: 10.1080/24699322.2016.1240298
Xiang Li, Weining Fang, Ying-jie Zhou
Abstract This paper introduces the concept of information entropy in studying mental workloads to predict the mental workload of an urban railway dispatcher and thereby ensure safe rail system operation. This study combines factors that can influence mental workload, including visual behaviors required for dispatchers to obtain information, information display duration, and the amount of information in order to establish a comprehensive mental workload prediction model. Experimental monitoring tasks were carried out on a simulation dispatch interface platform to verify the model’s validity. Three assessment methods (task performance assessment, subjective assessment, and physiological assessment) were adopted to measure the mental workload levels of dispatchers under different task conditions. The results demonstrate that the model’s theoretical prediction value significantly correlates with the various experimental results, thereby verifying the model validity and indicating that it can be used to predict the mental workload for different dispatch tasks, to provide a reference for work performance evaluation, and in designing optimized dispatch display interfaces.
{"title":"Mental workload prediction model based on information entropy","authors":"Xiang Li, Weining Fang, Ying-jie Zhou","doi":"10.1080/24699322.2016.1240298","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240298","url":null,"abstract":"Abstract This paper introduces the concept of information entropy in studying mental workloads to predict the mental workload of an urban railway dispatcher and thereby ensure safe rail system operation. This study combines factors that can influence mental workload, including visual behaviors required for dispatchers to obtain information, information display duration, and the amount of information in order to establish a comprehensive mental workload prediction model. Experimental monitoring tasks were carried out on a simulation dispatch interface platform to verify the model’s validity. Three assessment methods (task performance assessment, subjective assessment, and physiological assessment) were adopted to measure the mental workload levels of dispatchers under different task conditions. The results demonstrate that the model’s theoretical prediction value significantly correlates with the various experimental results, thereby verifying the model validity and indicating that it can be used to predict the mental workload for different dispatch tasks, to provide a reference for work performance evaluation, and in designing optimized dispatch display interfaces.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"116 - 123"},"PeriodicalIF":2.1,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60125969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-25DOI: 10.1080/24699322.2016.1240306
J. Ke, Shaoxing Zhang, Changsheng Li, Yun-Feng Zhu, Lei Hu, Furong Ma
Abstract Purpose: This article proposed and investigated the application of bonebed-malleus short process registration in minimally invasive cochlear implantation, and assessed the value of the proposed strategy for image-guided otologic surgery. Materials and methods: Ten temporal bone specimens were marked with both shallow and deep targets in order to measure registration resolutions. Two registration methods were applied. Method A (a new registration method) consisted of bonebed-malleus short process registration, while method B (traditional registration method) comprised registration using four titanium screws attached at the mastoid surface. The target registration errors (TRE) were measured at both the shallow and deep fiducial targets. After registration achieved by method A, percutaneous cochlear drilling was conducted on the other eight temporal bone specimens in order to observe the deviation from the target point and entry point. Results: Using method A, the error observed at the shallow fiducial markers of specimens was less than 1 mm, while the error observed at the deep fiducial markers was approximately equal to 1 mm. No significant difference was observed when results were compared with the application of method B. In eight studied cases using method A, drilling operations were successfully conducted. The deviations from the target point and the entry point were 0.84 ± 0.30 and 0.66 ± 0.51 mm, respectively. Conclusions: Results of the present study indicated that the new registration method demonstrated identical accuracy when compared to traditional registration method, achieved less invasiveness. Thus, the proposed method might be a feasible registration method for image-guided otologic surgery due to its mild invasiveness and high accuracy.
{"title":"Application of bonebed-malleus short process registration in minimally invasive cochlear implantation","authors":"J. Ke, Shaoxing Zhang, Changsheng Li, Yun-Feng Zhu, Lei Hu, Furong Ma","doi":"10.1080/24699322.2016.1240306","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240306","url":null,"abstract":"Abstract Purpose: This article proposed and investigated the application of bonebed-malleus short process registration in minimally invasive cochlear implantation, and assessed the value of the proposed strategy for image-guided otologic surgery. Materials and methods: Ten temporal bone specimens were marked with both shallow and deep targets in order to measure registration resolutions. Two registration methods were applied. Method A (a new registration method) consisted of bonebed-malleus short process registration, while method B (traditional registration method) comprised registration using four titanium screws attached at the mastoid surface. The target registration errors (TRE) were measured at both the shallow and deep fiducial targets. After registration achieved by method A, percutaneous cochlear drilling was conducted on the other eight temporal bone specimens in order to observe the deviation from the target point and entry point. Results: Using method A, the error observed at the shallow fiducial markers of specimens was less than 1 mm, while the error observed at the deep fiducial markers was approximately equal to 1 mm. No significant difference was observed when results were compared with the application of method B. In eight studied cases using method A, drilling operations were successfully conducted. The deviations from the target point and the entry point were 0.84 ± 0.30 and 0.66 ± 0.51 mm, respectively. Conclusions: Results of the present study indicated that the new registration method demonstrated identical accuracy when compared to traditional registration method, achieved less invasiveness. Thus, the proposed method might be a feasible registration method for image-guided otologic surgery due to its mild invasiveness and high accuracy.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"30 - 36"},"PeriodicalIF":2.1,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240306","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60126162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-24DOI: 10.1080/24699322.2016.1240293
Guangfei Li, Song Zhang, Lin Yang, Shufang Li, Yan Wang, Dongmei Hao, Yimin Yang, Xuwen Li, Lei Zhang, Mingzhou Xu
Abstract Non-stress testing (NST) is the primary method of determining fetal condition during the perinatal period, and as such, has high specificity. However, short-term monitoring and visual inspection of the cardiotocogram demonstrates several limitations in understanding fetal status which can be mistaken as predictors of neonatal asphyxia. Fetal electrocardiography (FECG) is a novel, long-term monitoring method which can reflect more objective and accurate fetal information. This article presents experimental results of four fetal heart rate (FHR) acceleration features of 44 fetuses extracted from FECG. The novelty of this approach lies in its combined use of parameters which can express both duration and amplitude of heart rate acceleration. Results demonstrate that most parameters significantly differ between normal fetuses and fetuses with suspected abnormalities. Results are promising for the identification of a set or parameters which may be used as classifiers to improve the success rate when distinguishing between normal and abnormal fetuses.
{"title":"Computerized analysis of acceleration parameter for the non-stress test normal and potentially abnormal fetuses","authors":"Guangfei Li, Song Zhang, Lin Yang, Shufang Li, Yan Wang, Dongmei Hao, Yimin Yang, Xuwen Li, Lei Zhang, Mingzhou Xu","doi":"10.1080/24699322.2016.1240293","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240293","url":null,"abstract":"Abstract Non-stress testing (NST) is the primary method of determining fetal condition during the perinatal period, and as such, has high specificity. However, short-term monitoring and visual inspection of the cardiotocogram demonstrates several limitations in understanding fetal status which can be mistaken as predictors of neonatal asphyxia. Fetal electrocardiography (FECG) is a novel, long-term monitoring method which can reflect more objective and accurate fetal information. This article presents experimental results of four fetal heart rate (FHR) acceleration features of 44 fetuses extracted from FECG. The novelty of this approach lies in its combined use of parameters which can express both duration and amplitude of heart rate acceleration. Results demonstrate that most parameters significantly differ between normal fetuses and fetuses with suspected abnormalities. Results are promising for the identification of a set or parameters which may be used as classifiers to improve the success rate when distinguishing between normal and abnormal fetuses.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"1 - 5"},"PeriodicalIF":2.1,"publicationDate":"2016-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240293","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60126334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-24DOI: 10.1080/24699322.2016.1240294
D. Chamoret, M. Bodo, S. Roth
Abstract This paper investigates a biomechanical aspect of human hand during grasping, using the finite-element method. A realistic three-dimensional finite–element (FE) model of a human hand is developed, including wrist bones, phalanges, soft tissues and skin, reconstructed from medical computed tomography (CT) scan images. Material laws of the literature have been implemented in the model, in order to be able to simulate a simple activity of grasping. In a human design context, this model allows an interesting biomechanical study, which simulates the grasping task in a biofidelic manner. This model is a first step in the modeling of the human hand that can lead to future studies dealing with the interaction of the hand with its environment for the improvement of safety requirements of future products development.
{"title":"A first step in finite-element simulation of a grasping task","authors":"D. Chamoret, M. Bodo, S. Roth","doi":"10.1080/24699322.2016.1240294","DOIUrl":"https://doi.org/10.1080/24699322.2016.1240294","url":null,"abstract":"Abstract This paper investigates a biomechanical aspect of human hand during grasping, using the finite-element method. A realistic three-dimensional finite–element (FE) model of a human hand is developed, including wrist bones, phalanges, soft tissues and skin, reconstructed from medical computed tomography (CT) scan images. Material laws of the literature have been implemented in the model, in order to be able to simulate a simple activity of grasping. In a human design context, this model allows an interesting biomechanical study, which simulates the grasping task in a biofidelic manner. This model is a first step in the modeling of the human hand that can lead to future studies dealing with the interaction of the hand with its environment for the improvement of safety requirements of future products development.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"22 - 29"},"PeriodicalIF":2.1,"publicationDate":"2016-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1240294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60126343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-01DOI: 10.1080/24699322.2016.1185467
Marco Mura, S. Parrini, G. Ciuti, V. Ferrari, C. Freschi, M. Ferrari, P. Dario, A. Menciassi
Abstract Background: Cardiovascular diseases are the first cause of death globally: an estimated 17.5 million people died in 2012. By combining the benefits of magnetic navigation and ultrasound (US) imaging, the authors proposed a robotic platform (i.e. the MicroVAST platform) for intravascular medical procedures. Methods: A 3D imaging US-based tracking algorithm is implemented for the navigation of a magnetic-dragged soft-tethered device. Tests were performed to evaluate the algorithm in terms of tracking error and precision of locomotion. Results: The 3D imaging US-based algorithm tracked the endovascular device with an error of 6.4 ± 2.8 pixels and a mean displacement between the endovascular device and the preoperative path of 13.6 ± 4.5 mm (computational time of 12.2 ± 1.5 ms and 30.7 ± 6.1 matched features). Conclusions: The MicroVAST platform includes innovative solutions for navigation allowing for an assisted magnetic locomotion of medical devices in the cardiovascular district by combining a 3D imaging US-based tracking algorithm with pre-operative data.
{"title":"A computer-assisted robotic platform for vascular procedures exploiting 3D US-based tracking","authors":"Marco Mura, S. Parrini, G. Ciuti, V. Ferrari, C. Freschi, M. Ferrari, P. Dario, A. Menciassi","doi":"10.1080/24699322.2016.1185467","DOIUrl":"https://doi.org/10.1080/24699322.2016.1185467","url":null,"abstract":"Abstract Background: Cardiovascular diseases are the first cause of death globally: an estimated 17.5 million people died in 2012. By combining the benefits of magnetic navigation and ultrasound (US) imaging, the authors proposed a robotic platform (i.e. the MicroVAST platform) for intravascular medical procedures. Methods: A 3D imaging US-based tracking algorithm is implemented for the navigation of a magnetic-dragged soft-tethered device. Tests were performed to evaluate the algorithm in terms of tracking error and precision of locomotion. Results: The 3D imaging US-based algorithm tracked the endovascular device with an error of 6.4 ± 2.8 pixels and a mean displacement between the endovascular device and the preoperative path of 13.6 ± 4.5 mm (computational time of 12.2 ± 1.5 ms and 30.7 ± 6.1 matched features). Conclusions: The MicroVAST platform includes innovative solutions for navigation allowing for an assisted magnetic locomotion of medical devices in the cardiovascular district by combining a 3D imaging US-based tracking algorithm with pre-operative data.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"63 - 79"},"PeriodicalIF":2.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1185467","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60125866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-01DOI: 10.1080/24699322.2016.1253774
C. Zoccali, Christina M. Walter, L. Favale, A. Di Francesco, B. Rossi
Abstract Purpose: In oncological orthopedics, navigation systems are limited to use in specialized centers, because specific, expensive, software is necessary. To resolve this problem, we present a technique using general spine navigation software to resect tumors located in different segments. Materials and Methods: This technique requires a primary surgery during which screws are inserted in the segment where the bone tumor is; next, a CT scan of the entire segment is used as a guide in a second surgery where a resection is performed under navigation control. We applied this technique in four selected cases. To evaluate the procedure, we considered resolution obtained, quality of the margin and its control. Results: In all cases, 1 mm resolution was obtained; navigation allowed perfect control of the osteotomies, reaching the minimum wide margin when desired. No complications were reported and all patients were free of disease at follow-up (average 25.5 months). Conclusions: This technique allows any bone segment to be recognized by the navigation system thanks to the introduction of screws as landmarks. The minimum number of screws required is four, but the higher the number of screws, the greater the accuracy and resolution. In our experience, five landmarks, placed distant from one another, is a good compromise. Possible disadvantages include the necessity to perform two surgeries and the need of a major surgical exposure; nevertheless, in our opinion, the advantages of better margin control justify the application of this technique in centers where an intraoperative CT scanner, synchronized with a navigation system or a dedicated software for bone tumor removal were not available.
{"title":"A computer-assisted navigation technique to perform bone tumor resection without dedicated software","authors":"C. Zoccali, Christina M. Walter, L. Favale, A. Di Francesco, B. Rossi","doi":"10.1080/24699322.2016.1253774","DOIUrl":"https://doi.org/10.1080/24699322.2016.1253774","url":null,"abstract":"Abstract Purpose: In oncological orthopedics, navigation systems are limited to use in specialized centers, because specific, expensive, software is necessary. To resolve this problem, we present a technique using general spine navigation software to resect tumors located in different segments. Materials and Methods: This technique requires a primary surgery during which screws are inserted in the segment where the bone tumor is; next, a CT scan of the entire segment is used as a guide in a second surgery where a resection is performed under navigation control. We applied this technique in four selected cases. To evaluate the procedure, we considered resolution obtained, quality of the margin and its control. Results: In all cases, 1 mm resolution was obtained; navigation allowed perfect control of the osteotomies, reaching the minimum wide margin when desired. No complications were reported and all patients were free of disease at follow-up (average 25.5 months). Conclusions: This technique allows any bone segment to be recognized by the navigation system thanks to the introduction of screws as landmarks. The minimum number of screws required is four, but the higher the number of screws, the greater the accuracy and resolution. In our experience, five landmarks, placed distant from one another, is a good compromise. Possible disadvantages include the necessity to perform two surgeries and the need of a major surgical exposure; nevertheless, in our opinion, the advantages of better margin control justify the application of this technique in centers where an intraoperative CT scanner, synchronized with a navigation system or a dedicated software for bone tumor removal were not available.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"28 1","pages":"166 - 171"},"PeriodicalIF":2.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1253774","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60126183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-01DOI: 10.1080/24699322.2016.1180429
Manning Wang, Zhijian Song
Abstract Skin markers (SMs) are usually used as fiducial points in registration of neuronavigation, but the areas in which they can be adhered to are restricted, which usually results in poor distribution of the SMs and a large registration error. In this research, we studied whether the registration accuracy can be improved by adding anatomical landmarks (ALs), which are thought to have a larger localization error than SMs. A series of random SM configurations were generated, and for each SM configuration, we generated a corresponding SM-AL configuration by adding several ALs. We then compared the accuracy of the point-matching registration of the SM configurations with that of the corresponding SM-AL configurations. Experiment results indicated that adding ALs always made the mean target registration error of the whole head fall into a lower and narrower range, which meant that the registration became more accurate and more stable. In addition, adding more ALs resulted in a better performance.
{"title":"How does adding anatomical landmarks as fiducial points in the point-matching registration of neuronavigation influence registration accuracy?","authors":"Manning Wang, Zhijian Song","doi":"10.1080/24699322.2016.1180429","DOIUrl":"https://doi.org/10.1080/24699322.2016.1180429","url":null,"abstract":"Abstract Skin markers (SMs) are usually used as fiducial points in registration of neuronavigation, but the areas in which they can be adhered to are restricted, which usually results in poor distribution of the SMs and a large registration error. In this research, we studied whether the registration accuracy can be improved by adding anatomical landmarks (ALs), which are thought to have a larger localization error than SMs. A series of random SM configurations were generated, and for each SM configuration, we generated a corresponding SM-AL configuration by adding several ALs. We then compared the accuracy of the point-matching registration of the SM configurations with that of the corresponding SM-AL configurations. Experiment results indicated that adding ALs always made the mean target registration error of the whole head fall into a lower and narrower range, which meant that the registration became more accurate and more stable. In addition, adding more ALs resulted in a better performance.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"21 1","pages":"39 - 45"},"PeriodicalIF":2.1,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2016.1180429","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60125734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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