Journal of Medical Ultrasonics最新文献_第4页

Impact of pulsed Doppler sample volume position on fetal cardiac output calculation. 脉冲多普勒样本体积位置对胎儿心输出量计算的影响。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-03-19 DOI: 10.1007/s10396-026-01619-7

Kosuke Yonehara, Kiyohiro Takigiku, Noboru Tanaka, Ryusuke Numata, Yuma Shibuya, Haruka Obinata, Yohei Akazawa, Kohta Takei

{"title":"Impact of pulsed Doppler sample volume position on fetal cardiac output calculation.","authors":"Kosuke Yonehara, Kiyohiro Takigiku, Noboru Tanaka, Ryusuke Numata, Yuma Shibuya, Haruka Obinata, Yohei Akazawa, Kohta Takei","doi":"10.1007/s10396-026-01619-7","DOIUrl":"https://doi.org/10.1007/s10396-026-01619-7","url":null,"abstract":"Purpose: This study aimed to evaluate the impact of sample volume position on fetal cardiac output (CO) measurements.Methods: Fetuses with normal hearts were enrolled. Fetal CO was calculated using the pulsed Doppler method, with the velocity time integral (VTI) recorded at two distinct positions: the valve hinge level (Valve: V group) and just distal to the valve (Supra-valve: S group). Additionally, we acquired electronic spatio-temporal image correlation (eSTIC) volume data. Left-ventricular CO was calculated as the product of stroke volume and heart rate, with stroke volume derived from left-ventricular volume measurements using the virtual organ computer-aided analysis (VOCAL) technique on the three-dimensional eSTIC data (eSTIC group). We then compared the left-ventricular CO levels among the V, S, and eSTIC groups to assess their correlation.Results: The S group showed significantly larger VTI of the aortic valve (8.5 ± 2.3 vs. 9.3 ± 2.5 cm, V vs. S group). Similarly, the S group also had significantly larger VTI of the pulmonary valve (7.0 ± 1.9 vs. 8.2 ± 2.2 cm). Combined cardiac output (CCO) in the V group was 396 ± 136 mL/min/kg, and that in the S group was 450 ± 154 mL/kg/min, which also showed that the S group had a significantly larger CCO. Focusing on left ventricle CO, the V group was 140 ± 73 mL/kg/min, the S group was 157 ± 77 mL/kg/min, and the eSTIC group was 133 ± 69 mL/kg/min. This suggested that the V group's results were more similar to the eSTIC group's.Conclusion: This study suggests that CO measurements are significantly influenced by the sample volume position. Furthermore, placing the VTI sample volume on the valve hinge level appears to reflect CO more accurately.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147488214","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

High-resolution ultrasound imaging of scrotal metastasis from colorectal cancer. 结直肠癌阴囊转移的高分辨率超声成像。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-02-27 DOI: 10.1007/s10396-026-01625-9

Michito Murayama, Takahito Iwai, Satomi Omotehara, Yusuke Kudo, Yuya Hanada, Zen-Ichi Tanei, Mutsumi Nishida

引用次数: 0

Explorative research on image quantification methods for setup conditions and quality control of ultrasound devices in thyroid ultrasonography. 甲状腺超声检查超声装置设置条件及质量控制图像量化方法的探索性研究。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-02-19 DOI: 10.1007/s10396-025-01606-4

Chisato Takahashi, Yukio Kimura, Shoko Nishiyama, Yumiko Kurosu, Haruka Ejiri, Mahiro Asano, Satoshi Suzuki, Shinichi Suzuki, Hiroki Shimura

{"title":"Explorative research on image quantification methods for setup conditions and quality control of ultrasound devices in thyroid ultrasonography.","authors":"Chisato Takahashi, Yukio Kimura, Shoko Nishiyama, Yumiko Kurosu, Haruka Ejiri, Mahiro Asano, Satoshi Suzuki, Shinichi Suzuki, Hiroki Shimura","doi":"10.1007/s10396-025-01606-4","DOIUrl":"https://doi.org/10.1007/s10396-025-01606-4","url":null,"abstract":"Purpose: The study explored the quantitative analysis of portable ultrasound devices using target images from Multipurpose Phantom N-365. It focused on identifying inter-device variability and time-dependent degradation of the devices and their probes to support standardization and quality control of ultrasound devices.Methods: Three ultrasound device models were assessed, with two different setup conditions for each model. Three types of phantom targets, i.e., cyst-like, colloid cyst-like, and nodule-like, were collected from circular grayscale targets. The mean and standard deviation (SD) of brightness were calculated for each target type.Results: Quantification of the mean and SD values of target brightness effectively distinguished between ultrasound devices due to the aging of the ultrasound equipment. Multivariate analysis further revealed that both the probes and the main unit independently contributed to time-related changes.Conclusion: This article presents a novel method for ensuring rigorous quality control and promoting standardization in ultrasound examinations by quantifying phantom image characteristics.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146228662","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

Optimizing Impella support level with intracardiac echocardiography during ventricular fibrillation storm ablation under veno-arterial extracorporeal membrane oxygenation. 静脉-动脉体外膜氧合下室性颤动风暴消融过程中利用超声心动图优化Impella支持水平。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-02-17 DOI: 10.1007/s10396-026-01618-8

Yuhei Kasai, Takayuki Kitai, Junji Morita, Ryo Horita, Ryo Otake, Jungo Kasai, Daisuke Hachinohe

引用次数: 0

Differentiation of focal liver lesions in contrast-enhanced ultrasound using a heuristic-guided hybrid machine-learning framework. 使用启发式引导混合机器学习框架鉴别对比增强超声局灶性肝脏病变。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-29 DOI: 10.1007/s10396-025-01598-1

Keisuke Nakajima, Naohisa Kamiyama, Katsutoshi Sugimoto, Hiroshi Hashimoto, Takao Itoi

{"title":"Differentiation of focal liver lesions in contrast-enhanced ultrasound using a heuristic-guided hybrid machine-learning framework.","authors":"Keisuke Nakajima, Naohisa Kamiyama, Katsutoshi Sugimoto, Hiroshi Hashimoto, Takao Itoi","doi":"10.1007/s10396-025-01598-1","DOIUrl":"https://doi.org/10.1007/s10396-025-01598-1","url":null,"abstract":"Purpose: Sonazoid contrast-enhanced ultrasound (CEUS) offers valuable diagnostic information on hepatic lesions, but it is time-consuming. In this study, we investigated a novel composite machine-learning framework that integrates heuristic knowledge and model-specific classification to differentiate liver lesions using only the first 2 min of CEUS imaging.Methods: CEUS images from 232 patients with 232 focal liver lesions (benign: 61, hepatocellular carcinoma [HCC]: 104, non-HCC malignancies [ML]: 67) were analyzed. For each case, six frames from injection to peak enhancement and static images at 1 and 2 min post-injection were used. Two deep learning models were developed: Model 1 classified heterogeneous enhancement patterns into \"benign,\" \"HCC,\" \"ML,\" or \"Uniform\" (homogeneous). Model 2 further classified \"Uniform\" cases into three diagnostic categories. Lesion brightness values were incorporated as input features. The artificial intelligence (AI) mode was also evaluated by observer study of three hepatologists using the area under the receiver operating characteristic curve (AUC).Results: The composite model was evaluated on 58 independent test cases, achieving classification accuracy of 81.8% for benign, 93.5% for HCC, and 68.8% for ML, with an overall accuracy of 84.5%. Binary classification (benign vs. malignant) yielded 97.9% sensitivity, 94.8% specificity, and 94.8% overall accuracy. For discrimination between benign and malignant, the mean AUC for the three observers was significantly improved with AI output, where the difference in AUC (95% confidence interval) was 0.095 (0.0197, 0.1703) (P = 0.013).Conclusions: The proposed AI-based framework enables accurate liver lesion classification using early phase CEUS, eliminating the need for Kupffer-phase imaging in many cases.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146087863","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

Effect of region of interest settings on diagnostic performance of attenuation imaging in hepatic steatosis. 兴趣区设置对肝脂肪变性衰减成像诊断性能的影响。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-28 DOI: 10.1007/s10396-025-01612-6

Shingo Tanaka, Noboru Ohba, Nagomi Saito, Kanna Tanaka, Yuka Ishimoto, Kayoko Ochi, Kenji Yasui, Minori Fujita, Kiyoshi Abe, Satoshi Takahashi

{"title":"Effect of region of interest settings on diagnostic performance of attenuation imaging in hepatic steatosis.","authors":"Shingo Tanaka, Noboru Ohba, Nagomi Saito, Kanna Tanaka, Yuka Ishimoto, Kayoko Ochi, Kenji Yasui, Minori Fujita, Kiyoshi Abe, Satoshi Takahashi","doi":"10.1007/s10396-025-01612-6","DOIUrl":"https://doi.org/10.1007/s10396-025-01612-6","url":null,"abstract":"Purpose: Attenuation techniques have been developed to quantify liver fat, improving diagnostic accuracy. However, the standardization of measurement methods remains undefined, limiting clinical application. This study evaluated the effect of different region of interest (ROI) settings on the attenuation coefficient (AC) and coefficient of determination (R2) in attenuation imaging (ATI).Methods: We analyzed 5212 ultrasound examinations performed at our institution. Two periods were compared: early [ROI positioned at twice the subcutaneous thickness; double positioning (DP), 2 × 3 cm] and late [ROI placed beneath the multireflection layer; color positioning (CP), 2 × 4 cm]. Additionally, AC and R2 were analyzed in 331 patients with stored raw data across four conditions: DP and CP for positioning, and 2 × 3 cm and 2 × 4 cm for size, respectively, using Bland-Altman analysis.Results: The early and late periods included 2881 and 2331 examinations, respectively. Patient characteristics were comparable. Significant differences were observed in the AC (median, 0.58 vs. 0.56 dB/cm/MHz), steatotic liver diagnostic rates based on AC, R2 (median, 0.87 vs. 0.93), and proportion of R2 ≥ 0.90. Raw data analysis showed slight differences in AC and R2 according to ROI position; however, there were significant differences in ROI size (AC: 2 × 3 > 2 × 4; R2: 2 × 4 > 2 × 3).Conclusion: In ATI, the larger ROI improved R2, whereas the smaller ROI yielded higher AC values, suggesting that ROI size affects diagnostic reliability. Standardizing ATI protocols is essential, with uniformity in ROI size being a priority.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146068444","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

Intrasheath snapping of the flexor tendons of the index finger in a pediatric patient. 小儿患者食指屈肌腱鞘内断裂。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-28 DOI: 10.1007/s10396-026-01616-w

Marco Becciolini, Giorgio Tamborrini, Andrea Poggetti

引用次数: 0

Quantitative dynamic evaluation of the talus-lateral malleolus distance during forward single-leg drop landing in individuals with chronic ankle instability: a cross-sectional study. 慢性踝关节不稳定患者向前单腿落点时距骨-外踝距离的定量动态评估：一项横断面研究。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-24 DOI: 10.1007/s10396-026-01617-9

Ayano Ishida, Satoshi Onoue, Yasunari Ikuta, Tsubasa Tashiro, Satoshi Arima, Makoto Komiya, Rami Mizuta, Honoka Ishihara, Toshiki Kobayashi, Fan Gao, Andreas Brand, Takashi Yamada, Noriaki Maeda

{"title":"Quantitative dynamic evaluation of the talus-lateral malleolus distance during forward single-leg drop landing in individuals with chronic ankle instability: a cross-sectional study.","authors":"Ayano Ishida, Satoshi Onoue, Yasunari Ikuta, Tsubasa Tashiro, Satoshi Arima, Makoto Komiya, Rami Mizuta, Honoka Ishihara, Toshiki Kobayashi, Fan Gao, Andreas Brand, Takashi Yamada, Noriaki Maeda","doi":"10.1007/s10396-026-01617-9","DOIUrl":"https://doi.org/10.1007/s10396-026-01617-9","url":null,"abstract":"Purpose: To evaluate the dynamics of the talus-lateral malleolus distance during landing and compare the results between individuals with chronic ankle instability (CAI) and healthy adults.Methods: Participants were divided into the healthy (12 adults, 12 feet) and CAI (12 adults, 12 feet) groups. Participants performed forward single-leg drop landing from a 30-cm-high box. Through the synchronization of ultrasound with a motion capture system, measurements of the talus-lateral malleolus distance and ankle joint angles were obtained during forward single-leg drop landing. The analysis interval was from 200 ms before to 200 ms after initial contact; the time was normalized to 100%. Statistical parametric mapping was employed to investigate differences in the temporal changes of the talus-lateral malleolus distances and ankle joint angles during landing between groups.Results: A significantly longer talus-lateral malleolus distance was observed before initial contact in the CAI group (1-49%) as compared with the healthy group (p = 0.000). In addition, the ankle adduction angle before initial contact (12-61%) was larger in the CAI group than in the healthy group (p = 0.005).Conclusion: Our findings suggest that the talus-lateral malleolus distance increases along with the ankle adduction movement in individuals with CAI, especially before initial contact, potentially indicating high mechanical ankle instability. This study established an innovative measurement system for quantitative evaluation of the dynamics of the talus and lateral malleolus during landing. The findings of this study may contribute to a more detailed understanding of pathology and features of movement in patients with CAI.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146040940","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

Enhanced manipulation technique for ultrasound-guided cervical nerve root block to improve shoulder external rotation in frozen shoulder: a retrospective study. 超声引导颈神经根阻滞增强手法技术改善肩周炎肩关节外旋的回顾性研究。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-23 DOI: 10.1007/s10396-025-01613-5

Kieun Park, Masashi Matsuzaki, Futoshi Ikuta

{"title":"Enhanced manipulation technique for ultrasound-guided cervical nerve root block to improve shoulder external rotation in frozen shoulder: a retrospective study.","authors":"Kieun Park, Masashi Matsuzaki, Futoshi Ikuta","doi":"10.1007/s10396-025-01613-5","DOIUrl":"https://doi.org/10.1007/s10396-025-01613-5","url":null,"abstract":"Purpose: We previously reported a manipulation technique for frozen shoulder using ultrasound-guided cervical nerve root block. Although the results were excellent, we considered that the range of external rotation could be improved. In the present study, we aimed to confirm the effectiveness of our modified manipulation technique for further improving the range of external rotation at the shoulder joint.Methods: We retrospectively searched our electronic medical records to identify patients who underwent manipulation for frozen shoulder at our institution between January 2024 and June 2024. A total of 173 shoulders of 169 patients (mean age 53.8 ± 6.9 years) were included. Three changes were made to our previous method: a change in the method for intra-articular injection of the glenohumeral joint, addition of C7 to the nerve block, and changes in the manual manipulation technique. Range of motion (ROM) at the shoulder was measured before manipulation and at 1 week, 1 month, 2 months, and 3 months after the procedure. The results were compared with those in our previous report.Results: Mean range of external rotation (95% confidence interval) was 11.5° (9.5-13.5, p = 0.51) before manipulation, 56.2° (52.9-59.5, p < 0.001) at 1 week, and 58.0° (53.9-62.7; p < 0.001) at 3 months. The results for range of external rotation were significantly better than in the previous report. There was no significant difference in ROM in terms of flexion and abduction between the two studies.Conclusion: Range of external rotation at the shoulder joint was significantly improved by use of the revised manipulation technique.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146042018","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

Phantom experiment for thoracic spine gap delineation using steering-transmitted ultrasound to assist epidural anesthesia. 引导透射超声辅助硬膜外麻醉胸椎间隙描绘的幻像实验。

IF 2.1 4区医学

Journal of Medical Ultrasonics Pub Date : 2026-01-22 DOI: 10.1007/s10396-025-01615-3

Yusuke Soejima, Eiko Onishi, Masanori Yamauchi, Mototaka Arakawa

{"title":"Phantom experiment for thoracic spine gap delineation using steering-transmitted ultrasound to assist epidural anesthesia.","authors":"Yusuke Soejima, Eiko Onishi, Masanori Yamauchi, Mototaka Arakawa","doi":"10.1007/s10396-025-01615-3","DOIUrl":"https://doi.org/10.1007/s10396-025-01615-3","url":null,"abstract":"Purpose: Epidural anesthesia under real-time ultrasound guidance has been studied to enhance puncture safety. However, in the thoracic spine, where the anatomy is complex and the interlaminar space is narrow, improved image quality is necessary. Because imaging quality is degraded in bones that are greatly tilted relative to the probe, we aimed to improve the imaging quality by steering the transmitted ultrasonic beam.Methods: We investigated a method to improve bone visibility by selecting appropriate transmit steering angles and receiving aperture ranges for each of the two bones forming the interlaminar space, and by compensating for the directivity of the receiving elements.Results: The proposed method emphasized the delineation of a bone phantom near the gap corresponding to the puncture site. Furthermore, when comparing the contrast ratio in the region of interest of the bone and gap areas, the proposed method showed an improvement of 24.2 dB on the left side and 4.2 dB on the right side compared to the conventional B-mode image.Conclusion: The proposed method was confirmed to emphasize the bones and is expected to improve the image quality of the thoracic spine gap.","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020483","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