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Call for a new Editor-in-Chief: Acta Radiologica / Acta Radiologica Open. 征集新主编:Acta Radiologica / Acta Radiologica Open。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 DOI: 10.1177/02841851241282945
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引用次数: 0
Exploring the impact of excluding intrahepatic segmental vessels on liver stiffness measurement and advanced fibrosis diagnosis using magnetic resonance elastography. 探讨排除肝内分段血管对使用磁共振弹性成像测量肝脏硬度和诊断晚期肝纤维化的影响。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-21 DOI: 10.1177/02841851241263335
Wook Kim, Jeong Ah Hwang, Ji Hye Min, Sunyoung Lee, Ji Eun Lee, Jaeseung Shin, Woo Kyoung Jeong

Background: The impact of excluding intrahepatic segmental vessels from regions of interest (ROIs) on liver stiffness measurement (LSM) via magnetic resonance elastography (MRE) remains uncertain.

Purpose: To determine the effect of excluding intrahepatic segmental vessels from ROIs on LSM obtained from MRE.

Material and methods: This retrospective analysis included 95 participants who underwent successful two-dimensional gradient recalled-echo MRE before hepatic tumor resection (n = 49) or living liver donation (n = 46). The conventional LSM was determined by manually drawing ROIs on the elastogram within the 95% confidence region, staying 1 cm within the liver capsule and excluding large hilar vessels, the gallbladder, hepatic lesions, and artifacts. In addition, the modified LSM was determined by excluding intrahepatic segmental vessels. LSMs obtained by the two methods were compared with paired sample signed-rank test. Diagnostic performance for advanced fibrosis was calculated and compared using McNemar's test and Delong's test. The stage of hepatic fibrosis was assessed using surgical specimens by the METAVIR system.

Results: The modified LSM was larger than the conventional LSM (2.4 kPa vs. 2.2 kPa in reader 1; 2.7 kPa vs. 2.4 kPa in reader 2; P < 0.001). The modified LSM showed superior sensitivity (0.841 vs. 0.659 in reader 1; 0.864 vs. 0.705 in reader 2; P < 0.05) and area under the curve (0.901 vs. 0.820 in reader 1; 0.912 vs. 0.843 in reader 2; P < 0.05) for detecting advanced fibrosis (≥F3) than conventional LSM.

Conclusion: The exclusion of intrahepatic segmental vessels from ROIs in MRE affected the LSM and enhanced diagnostic performance for advanced fibrosis.

背景:目的:确定从感兴趣区(ROIs)排除肝段内血管对通过磁共振弹性成像(MRE)测量肝脏硬度(LSM)的影响:这项回顾性分析包括95名在肝肿瘤切除术(49人)或活体肝脏捐献(46人)前成功接受二维梯度回波MRE的参与者。传统的LSM是在95%置信区域内的弹性图上手动绘制ROI,在肝囊中保留1厘米,排除大的肝门血管、胆囊、肝脏病变和伪影。此外,还通过排除肝段内血管来确定修正的 LSM。通过配对样本符号秩检验对两种方法得出的 LSM 进行比较。采用 McNemar 检验和 Delong 检验计算和比较晚期肝纤维化的诊断性能。使用METAVIR系统对手术标本进行肝纤维化分期评估:结果:改良 LSM 比传统 LSM 大(读者 1 为 2.4 kPa,读者 2 为 2.2 kPa;读者 2 为 2.7 kPa,读者 2 为 2.4 kPa;P P P P 结论:在 MRE 的 ROI 中排除肝段内血管会影响 LSM 并提高晚期肝纤维化的诊断性能。
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引用次数: 0
Radiographic measurements in distal radius fracture evaluation: a review of current techniques and a recommendation for standardization. 桡骨远端骨折评估中的 X 射线测量:当前技术回顾与标准化建议。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-23 DOI: 10.1177/02841851241266369
Nora Suojärvi, Eero Waris

Radiographic measurements play a crucial role in evaluating the alignment of distal radius fractures (DRFs). Various manual methods have been used to perform the measurements, but they are susceptible to inaccuracies. Recently, computer-aided methods have become available. This review explores the methods commonly used to assess DRFs. The review introduces the different measurement techniques, discusses the sources of measurement errors and measurement reliability, and provides a recommendation for their use. Radiographic measurements used in the evaluation of DRFs are not reliable. Standardizing the measurement techniques is crucial to address this and automated image analysis could help improve accuracy and reliability.

在评估桡骨远端骨折(DRF)的对位情况时,X 射线测量起着至关重要的作用。各种手动测量方法一直被广泛使用,但容易出现误差。最近,计算机辅助方法已经问世。本综述探讨了评估桡骨骨折的常用方法。综述介绍了不同的测量技术,讨论了测量误差的来源和测量的可靠性,并提供了使用这些技术的建议。用于 DRF 评估的 X 射线测量并不可靠。标准化测量技术对于解决这一问题至关重要,而自动图像分析则有助于提高准确性和可靠性。
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引用次数: 0
The risk factors affecting the persistence of corpus callosum splenium lesions. 影响胼胝体脾脏病变持续存在的风险因素。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-08-02 DOI: 10.1177/02841851241267147
Asuman Orhan Varoglu, Aysenur Avarisli, Havva Keskin, Didem Darici

Background: The most compact portion of the corpus callosum (CC) is the corpus splenium (CS).

Purpose: To evaluate the connection between clinical and demographic features to determine whether neuroimaging findings will be permanent or temporary in CS patients.

Material and methods: We enrolled 93 patients (age range = 18-86 years) with CS lesions. Demographic and clinical information were recorded. We examined the lesions depending on the location. Group 1 (n = 20) had lesions limited to the CS (egg-shaped or round); group 2 (n = 15) had "boomerang sign" lesions; and group 3 (n = 58) had splenium involvement in conditions affecting the whole brain (Boomerang sign+ plus).

Results: Group 1 had a lower mean age, shorter disease duration, and fewer persistent lesions than others (P < 0.01, P < 0.001, and P < 0.001, respectively). The mean disease onset age (in years) in group 1 was higher than that of the other groups (P < 0.045). Group 2 had lower potassium (K) (P < 0.003) and red cell distribution width levels (P < 0.029) than the other groups. Age <41.5 years (P < 0.001), age at illness initiation <48.5 years (P < 0.002), disease duration <5.5 months (P < 0.001), and eosinophil level <0.29 uL (P 0.014) all point to temporary lesions.

Conclusion: Cases with limited CS lesions have younger onset ages, lower disease onset ages, and shorter disease durations. Age, age of disease onset, disease duration, and eosinophil level are risk variables that affect whether CS lesions are permanent or temporary.

背景:胼胝体(CC)最紧凑的部分是脾团(CS):目的:评估临床和人口学特征之间的联系,以确定神经影像学结果在 CS 患者中是永久性的还是暂时性的:我们招募了 93 名 CS 病变患者(年龄范围 = 18-86 岁)。记录了人口统计学和临床信息。我们根据病变部位对其进行了检查。第一组(20 人)病变局限于 CS(蛋形或圆形);第二组(15 人)病变为 "回旋镖 "征;第三组(58 人)病变累及脾脏,影响整个大脑(回旋镖征+加号):结果:与其他组相比,第 1 组的平均年龄较小、病程较短、持续性病变较少(P P P P P P P P P P P P P P P 0.014),所有这些都表明病变是暂时性的:结论:CS局限性病变的病例发病年龄较小,发病年龄较低,病程较短。年龄、发病年龄、病程和嗜酸性粒细胞水平是影响 CS 病变是永久性还是暂时性的风险变量。
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引用次数: 0
Consecutive assessment of recovery after peripheral nerve injury of the sciatic nerve within the same rat using PET/MRI. 利用 PET/MRI 对同一只大鼠坐骨神经周围神经损伤后的恢复情况进行连续评估。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-21 DOI: 10.1177/02841851241265698
Jung Woo Nam, Dawei Song, Hyung Jun Kim

Background: Positron emission tomography (PET) has been reported as effective in diagnosing peripheral nerve injury (PNI). However, there is a lack of studies evaluating different degrees of PNI using PET within the same individual to reduce errors due to interindividual differences.

Purpose: To evaluate the recovery process in the same rat after sciatic nerve injury using PET/magnetic resonance imaging (MRI).

Material and methods: Crushing nerve injuries were induced in the left sciatic nerves of six male rats, preserving the right ones. The degree of nerve damage was measured at one, two, three, four, and five weeks postoperatively using three assessment methods: paw withdrawal threshold test (RevWT); PET (SUVR); and MRI (MRSIR). All the representing values of each method are presented as ratio values of the right and left sides in each rat.

Results: Significant gradual recovery of all rats was observed over time in all the methods. No significant differences in RevWT and MRSIR were observed between before and more than four weeks after injury, whereas a significant difference in SUVR was still observed between before and five weeks after injury (P = 0.0007). The parameters of all methods decreased significantly over time (P = 0.000, all), and the explanatory power was significant in RevWT, SUVR, and MRSIR.

Conclusion: PET and MRI could be valuable non-invasive techniques for diagnosing neuropathic pain resulting from PNI. PET/MRI would be expected to be a more accurate and informative diagnostic tool for PNI than MRI alone.

背景:据报道,正电子发射断层扫描(PET)可有效诊断周围神经损伤(PNI)。目的:使用 PET/磁共振成像(MRI)评估同一只大鼠坐骨神经损伤后的恢复过程:材料:对六只雄性大鼠的左侧坐骨神经造成挤压性神经损伤,保留右侧神经。在术后一周、两周、三周、四周和五周,使用三种评估方法测量神经损伤程度:爪抽出阈值测试(RevWT)、正电子发射计算机断层显像(SUVR)和核磁共振成像(MRSIR)。每种方法的所有代表值均以每只大鼠左右两侧的比率值表示:结果:在所有方法中都观察到所有大鼠随着时间的推移明显逐渐恢复。RevWT 和 MRSIR 在受伤前和受伤后四周以上没有观察到明显差异,而 SUVR 在受伤前和受伤后五周仍有明显差异(P = 0.0007)。随着时间的推移,所有方法的参数都明显下降(P = 0.000,全部),RevWT、SUVR 和 MRSIR 的解释力显著增强:结论:PET 和 MRI 是诊断 PNI 引起的神经病理性疼痛的重要非侵入性技术。PET/MRI有望成为比单独 MRI 更准确、信息更丰富的 PNI 诊断工具。
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引用次数: 0
Iodine concentration, HU accuracy, and metal artifacts evaluation on second-generation dual-layer spectral detector CT images with metal implants: a phantom study. 带金属植入物的第二代双层光谱探测器 CT 图像的碘浓度、HU 精确度和金属伪影评估:一项模型研究。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-08-14 DOI: 10.1177/02841851241269853
Xinming Zhang, Hanwei Li, Haowen Wang, Xiaomin Liu, Weiwei Deng, Jianqiu Zhong, Litian Fan, Qingqing Ling, Debin Hu, Hongliang Qi, Hongwen Chen

Background: Metal implants may affect the image quality, iodine concentration (IC), and CT Hounsfield unit (HU) quantification accuracy.

Purpose: To investigate the quantitative accuracy of IC and HU from dual-layer spectral detector (DLCT) in the presence of metal artifacts.

Material and methods: An experimental cylindrical phantom containing eight iodine inserts and two metal inserts was designed. The phantom underwent scanning at three radiation dose levels and two tube voltage settings. A set of conventional images (CIs), virtual monoenergetic images (VMIs), and iodine concentration maps (ICMs) were generated and measured for all the eight iodine inserts. Quantitative indicators of mean absolute percentage error (MAPE), artifact index (AI), contrast-to-noise ratio (CNR), signal-to-noise ratio (SNR), and standard deviation (SD) on CIs and VMIs were calculated for IC and HU. Subjective score evaluation was also conducted.

Results: The MAPEiodine values of all regions of interest across different scanning configurations were all <5%. Almost all APEiodine values were <5%, indicating that metal artifacts had little impact on IC measurements. When the tube voltage was fixed, the SD value of attenuation decreased with the increase of the tube current; this is also true when the tube current was fixed. The middle energy reconstructions seemed to give a good balance between reducing artifacts and improving contrast.

Conclusion: VMIs from DLCT can reduce metal artifacts, the accuracy of IC quantification is not sensitive to imaging parameters. In summary, metal implants exhibit minimal impact on image quality and IC quantification accuracy in reconstructed images from DLCT.

背景:目的:研究双层光谱探测器(DLCT)在金属伪影存在的情况下,碘浓度(IC)和CT Hounsfield单位(HU)定量的准确性:设计了一个包含八个碘插入物和两个金属插入物的圆柱形实验模型。该模型在三种辐射剂量水平和两种管电压设置下进行扫描。为所有八个碘插入物生成并测量了一组常规图像(CI)、虚拟单能图像(VMI)和碘浓度图(ICM)。计算了 IC 和 HU 的平均绝对百分比误差 (MAPE)、伪影指数 (AI)、对比度与噪声比 (CNR)、信噪比 (SNR) 以及 CI 和 VMI 的标准偏差 (SD) 等定量指标。同时还进行了主观评分评估:不同扫描配置下所有感兴趣区的 MAPE 碘值均为结论:DLCT 的 VMI 可以减少金属伪影,IC 定量的准确性对成像参数并不敏感。总之,在 DLCT 重建图像中,金属植入物对图像质量和 IC 定量准确性的影响微乎其微。
{"title":"Iodine concentration, HU accuracy, and metal artifacts evaluation on second-generation dual-layer spectral detector CT images with metal implants: a phantom study.","authors":"Xinming Zhang, Hanwei Li, Haowen Wang, Xiaomin Liu, Weiwei Deng, Jianqiu Zhong, Litian Fan, Qingqing Ling, Debin Hu, Hongliang Qi, Hongwen Chen","doi":"10.1177/02841851241269853","DOIUrl":"10.1177/02841851241269853","url":null,"abstract":"<p><strong>Background: </strong>Metal implants may affect the image quality, iodine concentration (IC), and CT Hounsfield unit (HU) quantification accuracy.</p><p><strong>Purpose: </strong>To investigate the quantitative accuracy of IC and HU from dual-layer spectral detector (DLCT) in the presence of metal artifacts.</p><p><strong>Material and methods: </strong>An experimental cylindrical phantom containing eight iodine inserts and two metal inserts was designed. The phantom underwent scanning at three radiation dose levels and two tube voltage settings. A set of conventional images (CIs), virtual monoenergetic images (VMIs), and iodine concentration maps (ICMs) were generated and measured for all the eight iodine inserts. Quantitative indicators of mean absolute percentage error (MAPE), artifact index (AI), contrast-to-noise ratio (CNR), signal-to-noise ratio (SNR), and standard deviation (SD) on CIs and VMIs were calculated for IC and HU. Subjective score evaluation was also conducted.</p><p><strong>Results: </strong>The MAPE<sub>iodine</sub> values of all regions of interest across different scanning configurations were all <5%. Almost all APE<sub>iodine</sub> values were <5%, indicating that metal artifacts had little impact on IC measurements. When the tube voltage was fixed, the SD value of attenuation decreased with the increase of the tube current; this is also true when the tube current was fixed. The middle energy reconstructions seemed to give a good balance between reducing artifacts and improving contrast.</p><p><strong>Conclusion: </strong>VMIs from DLCT can reduce metal artifacts, the accuracy of IC quantification is not sensitive to imaging parameters. In summary, metal implants exhibit minimal impact on image quality and IC quantification accuracy in reconstructed images from DLCT.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"1030-1038"},"PeriodicalIF":1.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141974788","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}
引用次数: 0
Deep learning image reconstruction for low-kiloelectron volt virtual monoenergetic images in abdominal dual-energy CT: medium strength provides higher lesion conspicuity. 腹部双能 CT 中低千电子伏虚拟单能图像的深度学习图像重建:中等强度可提供更高的病灶清晰度。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-21 DOI: 10.1177/02841851241262765
Jingyu Zhong, Yangfan Hu, Yue Xing, Lingyun Wang, Jianying Li, Wei Lu, Xiaomeng Shi, Defang Ding, Xiang Ge, Huan Zhang, Weiwu Yao

Background: The best settings of deep learning image reconstruction (DLIR) algorithm for abdominal low-kiloelectron volt (keV) virtual monoenergetic imaging (VMI) have not been determined.

Purpose: To determine the optimal settings of the DLIR algorithm for abdominal low-keV VMI.

Material and methods: The portal-venous phase computed tomography (CT) scans of 109 participants with 152 lesions were reconstructed into four image series: VMI at 50 keV using adaptive statistical iterative reconstruction (Asir-V) at 50% blending (AV-50); and VMI at 40 keV using AV-50 and DLIR at medium (DLIR-M) and high strength (DLIR-H). The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of nine anatomical sites were calculated. Noise power spectrum (NPS) using homogenous region of liver, and edge rise slope (ERS) at five edges were measured. Five radiologists rated image quality and diagnostic acceptability, and evaluated the lesion conspicuity.

Results: The SNR and CNR values, and noise and noise peak in NPS measurements, were significantly lower in DLIR images than AV-50 images in all anatomical sites (all P < 0.001). The ERS values were significantly higher in 40-keV images than 50-keV images at all edges (all P < 0.001). The differences of the peak and average spatial frequency among the four reconstruction algorithms were significant but relatively small. The 40-keV images were rated higher with DLIR-M than DLIR-H for diagnostic acceptance (P < 0.001) and lesion conspicuity (P = 0.010).

Conclusion: DLIR provides lower noise, higher sharpness, and more natural texture to allow 40 keV to be a new standard for routine VMI reconstruction for the abdomen and DLIR-M gains higher diagnostic acceptance and lesion conspicuity rating than DLIR-H.

背景:腹部低千电子伏(keV)虚拟单能成像(VMI)深度学习图像重建(DLIR)算法的最佳设置尚未确定:目的:确定腹部低千伏虚拟单能成像(VMI)的深度学习图像重建(DLIR)算法的最佳设置:将患有 152 个病灶的 109 名参试者的门静脉相计算机断层扫描(CT)重建为四个图像系列:使用自适应统计迭代重建(Asir-V)在 50%混合(AV-50)下重建 50 keV 的 VMI;使用 AV-50 和 DLIR 在中等强度(DLIR-M)和高强度(DLIR-H)下重建 40 keV 的 VMI。计算了九个解剖部位的信噪比(SNR)和对比度-噪声比(CNR)。测量了肝脏同质区域的噪声功率谱(NPS)和五个边缘的边缘上升斜率(ERS)。五位放射科医生对图像质量和诊断可接受性进行评分,并对病变的清晰度进行评估:结果:在所有解剖部位,DLIR 图像的 SNR 和 CNR 值以及 NPS 测量中的噪声和噪声峰值均显著低于 AV-50 图像(所有 P P P P = 0.010):结论:DLIR 提供了更低的噪声、更高的清晰度和更自然的纹理,使 40 keV 成为腹部常规 VMI 重建的新标准,DLIR-M 比 DLIR-H 获得了更高的诊断接受度和病灶清晰度评级。
{"title":"Deep learning image reconstruction for low-kiloelectron volt virtual monoenergetic images in abdominal dual-energy CT: medium strength provides higher lesion conspicuity.","authors":"Jingyu Zhong, Yangfan Hu, Yue Xing, Lingyun Wang, Jianying Li, Wei Lu, Xiaomeng Shi, Defang Ding, Xiang Ge, Huan Zhang, Weiwu Yao","doi":"10.1177/02841851241262765","DOIUrl":"10.1177/02841851241262765","url":null,"abstract":"<p><strong>Background: </strong>The best settings of deep learning image reconstruction (DLIR) algorithm for abdominal low-kiloelectron volt (keV) virtual monoenergetic imaging (VMI) have not been determined.</p><p><strong>Purpose: </strong>To determine the optimal settings of the DLIR algorithm for abdominal low-keV VMI.</p><p><strong>Material and methods: </strong>The portal-venous phase computed tomography (CT) scans of 109 participants with 152 lesions were reconstructed into four image series: VMI at 50 keV using adaptive statistical iterative reconstruction (Asir-V) at 50% blending (AV-50); and VMI at 40 keV using AV-50 and DLIR at medium (DLIR-M) and high strength (DLIR-H). The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of nine anatomical sites were calculated. Noise power spectrum (NPS) using homogenous region of liver, and edge rise slope (ERS) at five edges were measured. Five radiologists rated image quality and diagnostic acceptability, and evaluated the lesion conspicuity.</p><p><strong>Results: </strong>The SNR and CNR values, and noise and noise peak in NPS measurements, were significantly lower in DLIR images than AV-50 images in all anatomical sites (all <i>P</i> < 0.001). The ERS values were significantly higher in 40-keV images than 50-keV images at all edges (all <i>P</i> < 0.001). The differences of the peak and average spatial frequency among the four reconstruction algorithms were significant but relatively small. The 40-keV images were rated higher with DLIR-M than DLIR-H for diagnostic acceptance (<i>P</i> < 0.001) and lesion conspicuity (<i>P</i> = 0.010).</p><p><strong>Conclusion: </strong>DLIR provides lower noise, higher sharpness, and more natural texture to allow 40 keV to be a new standard for routine VMI reconstruction for the abdomen and DLIR-M gains higher diagnostic acceptance and lesion conspicuity rating than DLIR-H.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"1133-1146"},"PeriodicalIF":1.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141733234","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}
引用次数: 0
Development of a deep learning-based fully automated segmentation of rotator cuff muscles from clinical MR scans. 从临床磁共振扫描中开发基于深度学习的肩袖肌肉全自动分割技术。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-23 DOI: 10.1177/02841851241262325
Sae Hoon Kim, Hye Jin Yoo, Soon Ho Yoon, Yong Tae Kim, Sang Joon Park, Jee Won Chai, Jiseon Oh, Hee Dong Chae

Background: The fatty infiltration and atrophy in the muscle after a rotator cuff (RC) tear are important in surgical decision-making and are linked to poor clinical outcomes after rotator cuff repair. An accurate and reliable quantitative method should be developed to assess the entire RC muscles.

Purpose: To develop a fully automated approach based on a deep neural network to segment RC muscles from clinical magnetic resonance imaging (MRI) scans.

Material and methods: In total, 94 shoulder MRI scans (mean age = 62.3 years) were utilized for the training and internal validation datasets, while an additional 20 MRI scans (mean age = 62.6 years) were collected from another institution for external validation. An orthopedic surgeon and a radiologist manually segmented muscles and bones as reference masks. Segmentation performance was evaluated using the Dice score, sensitivities, precision, and percent difference in muscle volume (%). In addition, the segmentation performance was assessed based on sex, age, and the presence of a RC tendon tear.

Results: The average Dice score, sensitivities, precision, and percentage difference in muscle volume of the developed algorithm were 0.920, 0.933, 0.912, and 4.58%, respectively, in external validation. There was no difference in the prediction of shoulder muscles, with the exception of teres minor, where significant prediction errors were observed (0.831, 0.854, 0.835, and 10.88%, respectively). The segmentation performance of the algorithm was generally unaffected by age, sex, and the presence of RC tears.

Conclusion: We developed a fully automated deep neural network for RC muscle and bone segmentation with excellent performance from clinical MRI scans.

背景:肩袖(RC)撕裂后肌肉的脂肪浸润和萎缩对手术决策非常重要,并且与肩袖修复后的不良临床结果有关。目的:开发一种基于深度神经网络的全自动方法,从临床磁共振成像(MRI)扫描中分割肩袖肌肉:总共有94份肩部MRI扫描(平均年龄=62.3岁)被用于训练和内部验证数据集,另外20份MRI扫描(平均年龄=62.6岁)从其他机构收集用于外部验证。一名骨科医生和一名放射科医生手动分割肌肉和骨骼作为参考掩模。使用 Dice 评分、灵敏度、精确度和肌肉体积差异百分比(%)对分割性能进行评估。此外,还根据性别、年龄和是否存在 RC 肌腱撕裂对分割性能进行了评估:结果:在外部验证中,所开发算法的平均 Dice 分数、灵敏度、精确度和肌肉体积百分比差异分别为 0.920、0.933、0.912 和 4.58%。在肩部肌肉的预测方面,除了小圆肌的预测误差较大(分别为 0.831、0.854、0.835 和 10.88%)外,其他肌肉的预测没有差异。该算法的分割性能一般不受年龄、性别和是否存在 RC 撕裂的影响:我们开发了一种全自动深度神经网络,用于对临床核磁共振扫描中的 RC 肌肉和骨骼进行分割,效果非常出色。
{"title":"Development of a deep learning-based fully automated segmentation of rotator cuff muscles from clinical MR scans.","authors":"Sae Hoon Kim, Hye Jin Yoo, Soon Ho Yoon, Yong Tae Kim, Sang Joon Park, Jee Won Chai, Jiseon Oh, Hee Dong Chae","doi":"10.1177/02841851241262325","DOIUrl":"10.1177/02841851241262325","url":null,"abstract":"<p><strong>Background: </strong>The fatty infiltration and atrophy in the muscle after a rotator cuff (RC) tear are important in surgical decision-making and are linked to poor clinical outcomes after rotator cuff repair. An accurate and reliable quantitative method should be developed to assess the entire RC muscles.</p><p><strong>Purpose: </strong>To develop a fully automated approach based on a deep neural network to segment RC muscles from clinical magnetic resonance imaging (MRI) scans.</p><p><strong>Material and methods: </strong>In total, 94 shoulder MRI scans (mean age = 62.3 years) were utilized for the training and internal validation datasets, while an additional 20 MRI scans (mean age = 62.6 years) were collected from another institution for external validation. An orthopedic surgeon and a radiologist manually segmented muscles and bones as reference masks. Segmentation performance was evaluated using the Dice score, sensitivities, precision, and percent difference in muscle volume (%). In addition, the segmentation performance was assessed based on sex, age, and the presence of a RC tendon tear.</p><p><strong>Results: </strong>The average Dice score, sensitivities, precision, and percentage difference in muscle volume of the developed algorithm were 0.920, 0.933, 0.912, and 4.58%, respectively, in external validation. There was no difference in the prediction of shoulder muscles, with the exception of teres minor, where significant prediction errors were observed (0.831, 0.854, 0.835, and 10.88%, respectively). The segmentation performance of the algorithm was generally unaffected by age, sex, and the presence of RC tears.</p><p><strong>Conclusion: </strong>We developed a fully automated deep neural network for RC muscle and bone segmentation with excellent performance from clinical MRI scans.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"1126-1132"},"PeriodicalIF":1.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141750779","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}
引用次数: 0
Prediction of postoperative residual primary ovarian neoplasm or metastatic lesion close to rectum of serous ovarian carcinoma based on clinical and MR T1-DEI features. 根据临床和磁共振 T1-DEI 特征预测浆液性卵巢癌术后残余原发性卵巢肿瘤或靠近直肠的转移病灶。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-07-23 DOI: 10.1177/02841851241262520
Wenfei Zhang, Juncai Li, Qiao Chen, Hongliang Jin, Linyi Zhou, Li Liu

Background: The optimal primary debulking surgery outcome of serous ovarian carcinoma (SOC) is greatly affected by primary ovarian neoplasm or metastatic lesion close to the rectum.

Purpose: To study the risk factors affecting postoperative residual primary ovarian neoplasm or metastatic lesion close to the rectum of SOC.

Material and methods: The clinical and MRI data of 164 patients with SOC eligible from institution A (training and test groups) and 36 patients with SOC eligible from institution B (external validation group) were collected and retrospectively analyzed. The clinical data included age, serum carbohydrate antigen 125 (CA-125), human epididymis protein 4, and neutrophil-to-lymphocyte ratio (NLR). Magnetic resonance imaging (MRI) data included ovarian mass distribution, maximum diameter of ovarian mass, ovarian mass features, degree of rectal invasion of the primary ovarian neoplasm or metastatic lesion, and amount of ascites. A model was established using multivariate logistic regression.

Results: By univariate and multivariate logistic regressions, CA-125 (P = 0.024, odds ratio [OR] = 3.798, 95% confidence interval [CI] = 1.24-13.32), NLR (P = 0.037, OR = 3.543, 95% CI = 1.13-12.72), and degree of rectal invasion of the primary ovarian neoplasm or metastatic lesion (P < 0.001, OR = 37.723, 95% CI = 7.46-266.88) were screened as independent predictors. The area under the curve values of the model in the training, test, and external validation groups were 0.860, 0.764, and 0.778, respectively.

Conclusion: The clinical-radiological model based on T1-weighted dual-echo MRI can be used non-invasively to predict postoperative residual ovarian neoplasm or metastasis close to SOC in the rectum.

背景:目的:研究影响浆液性卵巢癌(SOC)术后残留原发卵巢肿瘤或直肠附近转移病灶的风险因素:收集并回顾性分析A机构(培训组和测试组)164例符合条件的SOC患者和B机构(外部验证组)36例符合条件的SOC患者的临床和MRI数据。临床数据包括年龄、血清碳水化合物抗原125(CA-125)、人类附睾蛋白4和中性粒细胞与淋巴细胞比值(NLR)。磁共振成像(MRI)数据包括卵巢肿块分布、卵巢肿块最大直径、卵巢肿块特征、原发性卵巢肿瘤或转移病灶的直肠侵犯程度以及腹水量。利用多变量逻辑回归建立了一个模型:通过单变量和多变量逻辑回归,CA-125(P = 0.024,几率比[OR] = 3.798,95% 置信区间[CI] = 1.24-13.32)、NLR(P = 0.037,OR = 3.543,95% CI = 1.13-12.72)、原发卵巢肿瘤或转移病灶的直肠侵犯程度(P基于 T1 加权双回波 MRI 的临床放射学模型可用于无创预测直肠内接近 SOC 的术后残留卵巢肿瘤或转移灶。
{"title":"Prediction of postoperative residual primary ovarian neoplasm or metastatic lesion close to rectum of serous ovarian carcinoma based on clinical and MR T1-DEI features.","authors":"Wenfei Zhang, Juncai Li, Qiao Chen, Hongliang Jin, Linyi Zhou, Li Liu","doi":"10.1177/02841851241262520","DOIUrl":"10.1177/02841851241262520","url":null,"abstract":"<p><strong>Background: </strong>The optimal primary debulking surgery outcome of serous ovarian carcinoma (SOC) is greatly affected by primary ovarian neoplasm or metastatic lesion close to the rectum.</p><p><strong>Purpose: </strong>To study the risk factors affecting postoperative residual primary ovarian neoplasm or metastatic lesion close to the rectum of SOC.</p><p><strong>Material and methods: </strong>The clinical and MRI data of 164 patients with SOC eligible from institution A (training and test groups) and 36 patients with SOC eligible from institution B (external validation group) were collected and retrospectively analyzed. The clinical data included age, serum carbohydrate antigen 125 (CA-125), human epididymis protein 4, and neutrophil-to-lymphocyte ratio (NLR). Magnetic resonance imaging (MRI) data included ovarian mass distribution, maximum diameter of ovarian mass, ovarian mass features, degree of rectal invasion of the primary ovarian neoplasm or metastatic lesion, and amount of ascites. A model was established using multivariate logistic regression.</p><p><strong>Results: </strong>By univariate and multivariate logistic regressions, CA-125 (<i>P</i> = 0.024, odds ratio [OR] = 3.798, 95% confidence interval [CI] = 1.24-13.32), NLR (<i>P</i> = 0.037, OR = 3.543, 95% CI = 1.13-12.72), and degree of rectal invasion of the primary ovarian neoplasm or metastatic lesion (<i>P</i> < 0.001, OR = 37.723, 95% CI = 7.46-266.88) were screened as independent predictors. The area under the curve values of the model in the training, test, and external validation groups were 0.860, 0.764, and 0.778, respectively.</p><p><strong>Conclusion: </strong>The clinical-radiological model based on T1-weighted dual-echo MRI can be used non-invasively to predict postoperative residual ovarian neoplasm or metastasis close to SOC in the rectum.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"1153-1163"},"PeriodicalIF":1.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141750780","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}
引用次数: 0
Pseudolesions involving bone and soft tissue regarding orthopedic oncology. 涉及骨和软组织的肿瘤骨科假性脓肿。
IF 1.1 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-09-01 Epub Date: 2024-05-16 DOI: 10.1177/02841851241248141
Omar Seyam, Fabiano N Cardoso, Suhitha Bysani, Bianca Constantin, Juan Pretell-Mazzini, Ty Subhawong

Pseudolesions in bone and muscle are encountered mostly incidentally in routine imaging studies, especially due to the recent advancements on many different imaging modalities. These lesions can be categorized into the following categories: normal variants; congenital; iatrogenic; degenerative; and postoperative. In this review, we discuss the many different radiological characteristics of musculoskeletal pseudolesions that appear on imaging, which can prevent non-essential additional studies.

骨骼和肌肉假性栓塞大多是在常规成像检查中偶然发现的,特别是由于近年来许多不同成像模式的进步。这些病变可分为以下几类:正常变异、先天性、先天性、退行性和术后。在这篇综述中,我们将讨论影像学中出现的肌肉骨骼假性瘤的多种不同放射学特征,这些特征可以避免非必要的额外检查。
{"title":"Pseudolesions involving bone and soft tissue regarding orthopedic oncology.","authors":"Omar Seyam, Fabiano N Cardoso, Suhitha Bysani, Bianca Constantin, Juan Pretell-Mazzini, Ty Subhawong","doi":"10.1177/02841851241248141","DOIUrl":"10.1177/02841851241248141","url":null,"abstract":"<p><p>Pseudolesions in bone and muscle are encountered mostly incidentally in routine imaging studies, especially due to the recent advancements on many different imaging modalities. These lesions can be categorized into the following categories: normal variants; congenital; iatrogenic; degenerative; and postoperative. In this review, we discuss the many different radiological characteristics of musculoskeletal pseudolesions that appear on imaging, which can prevent non-essential additional studies.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"1052-1064"},"PeriodicalIF":1.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140955504","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}
引用次数: 0
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Acta radiologica
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