Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000044
Z. Nuffer
{"title":"The utility of medical etymology in forming a differential diagnosis","authors":"Z. Nuffer","doi":"10.14303/IMAGING-MEDICINE.1000044","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000044","url":null,"abstract":"","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"16 1","pages":"11-12"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86733193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000073
M. Alalfy, O. Idris, H. Gaafar, Hany Saad, O. Nagy, Yossra Lasheen, Hadeer Hassan
Ultrasonographic assessment of fetal gestational age is very critical for clinical decision making in obstetrics, many fetal biometric parameters are extensively used but in this research study we mainly targeted transcerebellar diameter in second and third trimester among Egyptian population and its accuracy and clinical reliability to calculate fetal gestational age. Aim of the research: The main goal and corner stone purpose of this research was to measure the accuracy of the transcerebellar diameter Transcerebellar diameter in calculating the gestational age of fetuses among Egyptian population and if it is more accurate than other fetal biometric measurements (Biparietal diameter, Head circumference, Abdominal circumference, Femur Length) in gestations with no medical disorders or not and the additional different methodology implemented in this research in comparison to other studies was using the Transcerebellar diameter in diabetic mothers with macrosomic fetuses, in pregnant Egyptian ladies with hypertension during pregnancy that have growth restricted fetuses with evaluation of uteroplacental blood flow by Doppler flow indices confirming uteroplacental insufficiency, also in fetuses with congenital structural abnormalities and in cerebellar anomalies. Results: The IQR interquartile range of the discrepancy between menstrual and sonographic gestational ages was the least when Transcerebellar diameter, in comparison to Biparieteal Diameter, Head Circumference, Abdominal Circumference and Femur Length (0.43 mm, 1.27 mm, 1.0 mm, 1.56 mm and 1.28 mm, respectively). The difference, however, was statistically significant only when compared to that using Abdominal Circumference. Conclusion: We concluded that Transcerebellar diameter is the most accurate biometric measurement in both uncomplicated pregnancies and in complicated pregnancies with medical disorders such as Diabetes mellitus and hypertension especially when associated with fetal macrosomia or fetal intrauterine growth restriction and in structural abnormalities affecting organs other than cerebellum as the cerebellar growth is not affected by these circumstances.
{"title":"The value of fetal trans cerebellar diameter in detecting GA in different fetal growth patterns in Egyptian fetuses","authors":"M. Alalfy, O. Idris, H. Gaafar, Hany Saad, O. Nagy, Yossra Lasheen, Hadeer Hassan","doi":"10.14303/IMAGING-MEDICINE.1000073","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000073","url":null,"abstract":"Ultrasonographic assessment of fetal gestational age is very critical for clinical decision making in obstetrics, many fetal biometric parameters are extensively used but in this research study we mainly targeted transcerebellar diameter in second and third trimester among Egyptian population and its accuracy and clinical reliability to calculate fetal gestational age. Aim of the research: The main goal and corner stone purpose of this research was to measure the accuracy of the transcerebellar diameter Transcerebellar diameter in calculating the gestational age of fetuses among Egyptian population and if it is more accurate than other fetal biometric measurements (Biparietal diameter, Head circumference, Abdominal circumference, Femur Length) in gestations with no medical disorders or not and the additional different methodology implemented in this research in comparison to other studies was using the Transcerebellar diameter in diabetic mothers with macrosomic fetuses, in pregnant Egyptian ladies with hypertension during pregnancy that have growth restricted fetuses with evaluation of uteroplacental blood flow by Doppler flow indices confirming uteroplacental insufficiency, also in fetuses with congenital structural abnormalities and in cerebellar anomalies. Results: The IQR interquartile range of the discrepancy between menstrual and sonographic gestational ages was the least when Transcerebellar diameter, in comparison to Biparieteal Diameter, Head Circumference, Abdominal Circumference and Femur Length (0.43 mm, 1.27 mm, 1.0 mm, 1.56 mm and 1.28 mm, respectively). The difference, however, was statistically significant only when compared to that using Abdominal Circumference. Conclusion: We concluded that Transcerebellar diameter is the most accurate biometric measurement in both uncomplicated pregnancies and in complicated pregnancies with medical disorders such as Diabetes mellitus and hypertension especially when associated with fetal macrosomia or fetal intrauterine growth restriction and in structural abnormalities affecting organs other than cerebellum as the cerebellar growth is not affected by these circumstances.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"34 1","pages":"131-138"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91162504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000082
M. A. E. Bagi, B. Mutairi, S. Alsolamy, Mohamed Alaizari, Sumaya Alrashid, I. Alrashidi, Naila Shaheen MerciaReutener
Purpose: Acute non-traumatic abdominal pain (ANTAP) is a frequent presentation at the emergency department (ED). Plain abdominal radiographs (PAR's) were historically the principal imaging tool. The objective of this study was to determine whether PAR's are still in use for ANTAP diagnosis. The other objective was to determine whether PAR’s stood-alone or were they a redundant step delaying the definitive imaging test. When CT scans were added to PAR's, the sensitivity and specificity of the two modalities were compared. Methods: A report of a retrospective study conducted at an 800-bed hospital ED between 01.06.2014 and 30.06.2014. All patients aged 15 and above who presented with ANTAP and referred first for PAR’s were included. Traumatic, obstetric, gynaecologic cases were excluded. The discharge diagnosis was considered the gold standard. Main findings: The study included 756 patients. 375 (49.6%) were males, 381 (50.4%) were females. The age range was 15 to 92 yrs. Mean age was 46 yrs. The most common presentation was an unclassified abdominal pain in 516 (68%). PAR's were requested alone for 594 (78.5%) and in combination with Conventional CT in 103 (13.6%). Low dose CT was added for 33 (4.3%). The sensitivity of PAR's and CT for urinary stones was 32.8% and 91.3% respectively. The sensitivity of PAR's and CT for intestinal obstruction was 50% and 83.3% respectively. Conclusion: PAR's are still in use as a one-stop shop for imaging the majority of patients presenting with ANTAP. In patients who had both CT and PAR's, there was a low PAR's sensitivity leading to poor congruence in diagnosing abnormal cases. However, CT delivered a higher radiation dose. There is a need to replace the conventional CT and PAR's for ANTAP imaging.
{"title":"Should plain radiographs persist or be replaced by alternative scans for imaging of acute painful non-traumatic abdominal pain?","authors":"M. A. E. Bagi, B. Mutairi, S. Alsolamy, Mohamed Alaizari, Sumaya Alrashid, I. Alrashidi, Naila Shaheen MerciaReutener","doi":"10.14303/IMAGING-MEDICINE.1000082","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000082","url":null,"abstract":"Purpose: Acute non-traumatic abdominal pain (ANTAP) is a frequent presentation at the emergency department (ED). Plain abdominal radiographs (PAR's) were historically the principal imaging tool. The objective of this study was to determine whether PAR's are still in use for ANTAP diagnosis. The other objective was to determine whether PAR’s stood-alone or were they a redundant step delaying the definitive imaging test. When CT scans were added to PAR's, the sensitivity and specificity of the two modalities were compared. Methods: A report of a retrospective study conducted at an 800-bed hospital ED between 01.06.2014 and 30.06.2014. All patients aged 15 and above who presented with ANTAP and referred first for PAR’s were included. Traumatic, obstetric, gynaecologic cases were excluded. The discharge diagnosis was considered the gold standard. Main findings: The study included 756 patients. 375 (49.6%) were males, 381 (50.4%) were females. The age range was 15 to 92 yrs. Mean age was 46 yrs. The most common presentation was an unclassified abdominal pain in 516 (68%). PAR's were requested alone for 594 (78.5%) and in combination with Conventional CT in 103 (13.6%). Low dose CT was added for 33 (4.3%). The sensitivity of PAR's and CT for urinary stones was 32.8% and 91.3% respectively. The sensitivity of PAR's and CT for intestinal obstruction was 50% and 83.3% respectively. Conclusion: PAR's are still in use as a one-stop shop for imaging the majority of patients presenting with ANTAP. In patients who had both CT and PAR's, there was a low PAR's sensitivity leading to poor congruence in diagnosing abnormal cases. However, CT delivered a higher radiation dose. There is a need to replace the conventional CT and PAR's for ANTAP imaging.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"26 1","pages":"179-183"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83875081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/Imaging-Medicine.1000048
M. Verjee
The Achilles tendon or heel cord, also commonly known as the calcaneal tendon, is a thickest tendon of the back of the leg in the human body. It serves to connect the plantaris, gastrocnemius (calf) and soleus muscles to the calcaneus (heel) bone. These muscles, acting by means of the tendon, cause plantar flexion of the foot at the ankle, and (aside from soleus) flexion at the knee. Achilles tendon rupture is the point at which the achilles tendon breaks. The achilles is the most commonly injured tendon. A break can happen while performing activities requiring increasing acceleration, for example, pushing off or jumping. The male to female proportion for Achilles tendon break fluctuates in the vicinity of 7:1 and 4:1 across various studies.
{"title":"Acute achilles tendon rupture sustainedduring exertional squash play","authors":"M. Verjee","doi":"10.14303/Imaging-Medicine.1000048","DOIUrl":"https://doi.org/10.14303/Imaging-Medicine.1000048","url":null,"abstract":"The Achilles tendon or heel cord, also commonly known as the calcaneal tendon, is a thickest tendon of the back of the leg in the human body. It serves to connect the plantaris, gastrocnemius (calf) and soleus muscles to the calcaneus (heel) bone. These muscles, acting by means of the tendon, cause plantar flexion of the foot at the ankle, and (aside from soleus) flexion at the knee. Achilles tendon rupture is the point at which the achilles tendon breaks. The achilles is the most commonly injured tendon. A break can happen while performing activities requiring increasing acceleration, for example, pushing off or jumping. The male to female proportion for Achilles tendon break fluctuates in the vicinity of 7:1 and 4:1 across various studies.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"40 1","pages":"29-30"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81419400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000087
Z. Alaya, A. Bouajina
{"title":"Osteolytic bone lesions: a rare complication of myelofibrosis","authors":"Z. Alaya, A. Bouajina","doi":"10.14303/IMAGING-MEDICINE.1000087","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000087","url":null,"abstract":"","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81464911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000056
Abuzaid Mm, W. Elshami, S. HaneefCAlyafei
Introduction: The aim of this study was to investigate the dose reduction to the thyroid gland during routine brain CT examinations. Also, the study compares the quality of the images before and after applying the thyroid shields. Material and methods: An experimental study utilizing head attenuation phantom and multi-slice 16 CT scanner. Dose measurement conducted by thermoluminescent dosimeter (TLD). A circumferential thyroid shielding was used during pre and post scan, images from scan qualitatively assessed for quality parameters such as grayscale, noise, soft tissue, bone details and overall image quality. Results: An average of 45% reduction in the entrance skin dose to the thyroid area was reported. 40-60% dose reduction was achieved at different points along thyroid region. The results of the image quality comparisons between scans done with and without shielding showed that quality of the images was not affected. Significant reduction in the scatter radiation dose to the thyroid during CT head scan when shielding applied. The study proved that application of thyroid shielding would not affect the quality of the images. Therefore, it is highly recommended to be used during brain scan whenever it is possible.
{"title":"Thyroid shield during brain CT scan: dosereduction and image quality evaluation","authors":"Abuzaid Mm, W. Elshami, S. HaneefCAlyafei","doi":"10.14303/IMAGING-MEDICINE.1000056","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000056","url":null,"abstract":"Introduction: The aim of this study was to investigate the dose reduction to the thyroid gland during routine brain CT examinations. Also, the study compares the quality of the images before and after applying the thyroid shields. Material and methods: An experimental study utilizing head attenuation phantom and multi-slice 16 CT scanner. Dose measurement conducted by thermoluminescent dosimeter (TLD). A circumferential thyroid shielding was used during pre and post scan, images from scan qualitatively assessed for quality parameters such as grayscale, noise, soft tissue, bone details and overall image quality. Results: An average of 45% reduction in the entrance skin dose to the thyroid area was reported. 40-60% dose reduction was achieved at different points along thyroid region. The results of the image quality comparisons between scans done with and without shielding showed that quality of the images was not affected. Significant reduction in the scatter radiation dose to the thyroid during CT head scan when shielding applied. The study proved that application of thyroid shielding would not affect the quality of the images. Therefore, it is highly recommended to be used during brain scan whenever it is possible.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"31 1","pages":"45-48"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86947808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000071
M. Gameraddin, Sultan Alshoabi Yousif Alarkani
A dermoid cyst is a rare benign cystic teratoma. On ultrasound, it has variable sonographic features since it is usually filled with an admixture of ectoderm, mesoderm, and endoderm origin contents. Because of the lumen of the dermoid cyst is usually filled with an admixture of ectoderm, mesoderm and endoderm origin contents, it appears as different areas of echogenicity. The coalescence of the hyperechoic fat into globules within the hypoechoic fluid matrix forming an unusual appearance of ''Coins-in-Sack'' on ultrasonography. This is virtually typical for a dermoid cyst. In this case, we suggested the term "Coins-in-Sack" appearance as an accurate and descriptive diagnostic sonographic feature of this an uncommon para-sacral dermoid cyst.
{"title":"An unusual sonographic appearance of a dermoid cyst in a young patient","authors":"M. Gameraddin, Sultan Alshoabi Yousif Alarkani","doi":"10.14303/IMAGING-MEDICINE.1000071","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000071","url":null,"abstract":"A dermoid cyst is a rare benign cystic teratoma. On ultrasound, it has variable sonographic features since it is usually filled with an admixture of ectoderm, mesoderm, and endoderm origin contents. Because of the lumen of the dermoid cyst is usually filled with an admixture of ectoderm, mesoderm and endoderm origin contents, it appears as different areas of echogenicity. The coalescence of the hyperechoic fat into globules within the hypoechoic fluid matrix forming an unusual appearance of ''Coins-in-Sack'' on ultrasonography. This is virtually typical for a dermoid cyst. In this case, we suggested the term \"Coins-in-Sack\" appearance as an accurate and descriptive diagnostic sonographic feature of this an uncommon para-sacral dermoid cyst.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"1 1","pages":"121-123"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89788498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000079
Rama Devi, Arasaratnam Shantini Mohammed Hussein Muna
A 53 year old female patient presented with a suspicious palpable breast mass with a clinical and radiological suspicion of malignancy. Histological evaluation, however, revealed a rare benign neoplasm. Granular cell tumor is a rare neoplasm that may occur in any anatomical part of the body, most commonly the tongue. GCT of the breast is commonly a benign neoplasm. However, clinically and radiologically it can mimic breast malignancy. It commonly presents as a painless palpable lump while the sonogram and mammogram are variable. FNA or core needle biopsy is diagnostic and wide local excision is the choice of management.
{"title":"Granular cell tumour of the breast - diagnostic radiology case study","authors":"Rama Devi, Arasaratnam Shantini Mohammed Hussein Muna","doi":"10.14303/IMAGING-MEDICINE.1000079","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000079","url":null,"abstract":"A 53 year old female patient presented with a suspicious palpable breast mass with a clinical and radiological suspicion of malignancy. Histological evaluation, however, revealed a rare benign neoplasm. Granular cell tumor is a rare neoplasm that may occur in any anatomical part of the body, most commonly the tongue. GCT of the breast is commonly a benign neoplasm. However, clinically and radiologically it can mimic breast malignancy. It commonly presents as a painless palpable lump while the sonogram and mammogram are variable. FNA or core needle biopsy is diagnostic and wide local excision is the choice of management.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"57 1","pages":"155-160"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76303237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14303/IMAGING-MEDICINE.1000083
S. Kanao, M. Kataoka, M. Iima, A. Ohno, Rena Sakaguchi, Akane Ohashi, M. Honda, M. Toi, David APorter Kaori Togashi
Objective: Compared to dynamic contrast enhanced MRI (DCE-MRI), image quality in diffusion-weighted MR imaging (DW-MRI) is generally poor because of low image spatial resolution and distortion. Readout-segmented EPI (RS-EPI) is a recently-developed technique to obtain high resolution DW-MRI with less distortion. The study aimed to evaluate the feasibility of high-resolution DW-MRI of the breast, using RS-EPI and single-shot EPI (SS-EPI). Methods: With IRB approval, 26 patients with clinically suspected breast cancer were prospectively enrolled. Breast MRI was performed on a 3.0 T scanner using a 16-channel breast coil. Sequences include T2-weighted imaging (T2WI) with fat saturation, a 3D DCE-MRI series and DW-MRI (b values of 0 and 850 s/mm2 for RS-EPI and SS-EPI). To evaluate image distortion, the antero-posterior (AP) extent of the mammary gland on DW-MRI with RS-EPI and SS-EPI were measured and differences from values obtained from T2WI were calculated. The artefacts on both sequences were scored. Diagnostic performance of lesions on both sequences was assessed using BI-RADS classification and the category was compared to that determined by DCE-MRI. Results: The average difference in the measured AP extent on DW-MRI with RS-EPI was significantly less than that on DW-MRI with SS-EPI (2.3 ± 2.0 versus 12.5 ± 4.7 mm, respectively, p<0.01). Distortion artefacts were significantly lower on DW-MRI with RS-EPI than that with SS-EPI in all cases. The sensitivity of DW-MRI with RS-EPI was higher than that with SS-EPI (88.9 and 77.8%, respectively). Conclusion: DW-MRI with RS-EPI has an advantage of less distortion compared to that with SS-EPI.
目的:与动态对比增强MRI (DCE-MRI)相比，弥散加权磁共振成像(DW-MRI)的图像质量普遍较差，主要是由于图像空间分辨率低和失真。读数分割EPI (RS-EPI)是近年来发展起来的一种获得低失真高分辨率DW-MRI的技术。本研究旨在评估采用RS-EPI和单次EPI (SS-EPI)对乳房进行高分辨率dw mri的可行性。方法:经IRB批准，前瞻性纳入26例临床疑似乳腺癌患者。在3.0 T扫描仪上使用16通道乳房线圈进行乳房MRI。序列包括脂肪饱和度的t2加权成像(T2WI)， 3D DCE-MRI系列和DW-MRI (RS-EPI和SS-EPI的b值分别为0和850 s/mm2)。为了评估图像失真，我们测量了DW-MRI (RS-EPI和SS-EPI)上乳腺的前后(AP)范围，并计算了与T2WI所得值的差异。对两个序列上的伪影进行评分。使用BI-RADS分类评估两个序列的病变诊断性能，并将分类与DCE-MRI确定的分类进行比较。结果:DW-MRI结合RS-EPI与DW-MRI结合SS-EPI测量AP范围的平均差异显著小于DW-MRI(分别为2.3±2.0 mm与12.5±4.7 mm, p<0.01)。在所有病例中，使用RS-EPI的DW-MRI的畸变伪影明显低于SS-EPI。RS-EPI对DW-MRI的敏感性高于SS-EPI(分别为88.9和77.8%)。结论:与SS-EPI相比，RS-EPI的DW-MRI具有畸变较小的优势。
{"title":"High-resolution diffusion-weighted MRI of the breast using readout-segmented EPI and single-shot EPI","authors":"S. Kanao, M. Kataoka, M. Iima, A. Ohno, Rena Sakaguchi, Akane Ohashi, M. Honda, M. Toi, David APorter Kaori Togashi","doi":"10.14303/IMAGING-MEDICINE.1000083","DOIUrl":"https://doi.org/10.14303/IMAGING-MEDICINE.1000083","url":null,"abstract":"Objective: Compared to dynamic contrast enhanced MRI (DCE-MRI), image quality in diffusion-weighted MR imaging (DW-MRI) is generally poor because of low image spatial resolution and distortion. Readout-segmented EPI (RS-EPI) is a recently-developed technique to obtain high resolution DW-MRI with less distortion. The study aimed to evaluate the feasibility of high-resolution DW-MRI of the breast, using RS-EPI and single-shot EPI (SS-EPI). Methods: With IRB approval, 26 patients with clinically suspected breast cancer were prospectively enrolled. Breast MRI was performed on a 3.0 T scanner using a 16-channel breast coil. Sequences include T2-weighted imaging (T2WI) with fat saturation, a 3D DCE-MRI series and DW-MRI (b values of 0 and 850 s/mm2 for RS-EPI and SS-EPI). To evaluate image distortion, the antero-posterior (AP) extent of the mammary gland on DW-MRI with RS-EPI and SS-EPI were measured and differences from values obtained from T2WI were calculated. The artefacts on both sequences were scored. Diagnostic performance of lesions on both sequences was assessed using BI-RADS classification and the category was compared to that determined by DCE-MRI. Results: The average difference in the measured AP extent on DW-MRI with RS-EPI was significantly less than that on DW-MRI with SS-EPI (2.3 ± 2.0 versus 12.5 ± 4.7 mm, respectively, p<0.01). Distortion artefacts were significantly lower on DW-MRI with RS-EPI than that with SS-EPI in all cases. The sensitivity of DW-MRI with RS-EPI was higher than that with SS-EPI (88.9 and 77.8%, respectively). Conclusion: DW-MRI with RS-EPI has an advantage of less distortion compared to that with SS-EPI.","PeriodicalId":13333,"journal":{"name":"Imaging in Medicine","volume":"63 7","pages":"185-190"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91509770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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