Journal of Medical Ultrasonics最新文献_第8页

Usefulness of “AcT ratio” in diagnosis of internal carotid artery stenosis: a multicenter, retrospective, observational study AcT比值 "在颈内动脉狭窄诊断中的实用性：一项多中心、回顾性、观察性研究

IF 1.8 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-06 DOI: 10.1007/s10396-024-01409-z

{"title":"Usefulness of “AcT ratio” in diagnosis of internal carotid artery stenosis: a multicenter, retrospective, observational study","authors":"","doi":"10.1007/s10396-024-01409-z","DOIUrl":"https://doi.org/10.1007/s10396-024-01409-z","url":null,"abstract":"<h3>Abstract</h3> <span> <h3>Purpose</h3> <p>The ratio of the internal carotid artery (ICA) to the common carotid artery (CCA), especially the “AcT ratio,” which is a modified measurement method of acceleration time, is useful for diagnosing ICA-origin stenosis. However, previous studies were single-center studies. Therefore, this multicenter, retrospective, cross-sectional study aimed to determine whether a method using the AcT ratio is useful for estimating stenosis rates.</p> </span> <span> <h3>Methods</h3> <p>This study included 461 vessels subjected to carotid artery ultrasonography and evaluation for ICA-origin stenosis via NASCET at four hospitals. The duration from the steep rise point to the inflection point or the first peak was defined as AcT on pulsed wave Doppler. The AcT ratio was calculated as AcT of ICA/AcT of ipsilateral CCA. The AcT ratio and rate of ICA-origin stenosis were analyzed using Pearson's correlation coefficient, simple regression analysis, and ROC curve.</p> </span> <span> <h3>Results</h3> <p>A significant positive correlation was observed between the AcT ratio and NASCET stenosis. NASCET stenosis of ≥ 50% had a sensitivity, specificity, and negative predictive value (NPV) of 70.2%, 71.6%, and 91.5%, respectively, when the cut-off value of the AcT ratio was 1.17. NASCET stenosis of ≥ 70% had a sensitivity, specificity, and NPV of 70.5%, 72.1%, and 95.9%, respectively, when the cut-off value of the AcT ratio was 1.22.</p> </span> <span> <h3>Conclusions</h3> <p>The findings of this multicenter, retrospective, cross-sectional study suggest that the AcT ratio is useful for diagnosing ICA-origin stenosis, especially for diagnosis by exclusion. NASCET stenosis of ≥ 50% was considered unlikely if the Act ratio was ≤ 1.17, whereas NASCET stenosis of ≥ 70% was considered unlikely if it was ≤ 1.22.</p> </span>","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569059","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

Correction: Modified multi-Rayleigh model-based statistical analysis of ultrasound envelope for quantification of liver steatosis and fibrosis. 更正：基于多雷利模型的改良超声包膜统计分析，用于量化肝脏脂肪变性和纤维化。

IF 1.8 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-05 DOI: 10.1007/s10396-024-01454-8

Yuki Ujihara, K. Tamura, Shohei Mori, Dar-In Tai, Po-Hsiang Tsui, Shinnosuke Hirata, Kenji Yoshida, Hitoshi Maruyama, Tadashi Yamaguchi

引用次数: 0

Facilitatory effect of low-pulse repetition frequency ultrasound on release of extracellular vesicles from cultured myotubes 低脉冲重复频率超声波对培养肌管释放细胞外囊泡的促进作用

IF 1.8 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-04 DOI: 10.1007/s10396-024-01429-9

Xiaoqi Ma, Atomu Yamaguchi, Noriaki Maeshige, Kento Tanida, Mikiko Uemura, Fuwen Lu, Hiroyo Kondo, Hidemi Fujino

{"title":"Facilitatory effect of low-pulse repetition frequency ultrasound on release of extracellular vesicles from cultured myotubes","authors":"Xiaoqi Ma, Atomu Yamaguchi, Noriaki Maeshige, Kento Tanida, Mikiko Uemura, Fuwen Lu, Hiroyo Kondo, Hidemi Fujino","doi":"10.1007/s10396-024-01429-9","DOIUrl":"https://doi.org/10.1007/s10396-024-01429-9","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Extracellular vesicles (EVs) serve as carriers of intracellular factors with therapeutic effects, including tissue regeneration and attenuation of inflammatory responses. The majority of EVs in vivo are derived from skeletal muscle, which is reported to have anti-inflammatory effects. While high-intensity pulsed ultrasound (US) irradiation has been shown to promote EV secretion from myotubes, the impact of pulse repetition frequency, a US parameter affecting pulse length, on EV release remains unclear. This study aimed to investigate the impact of pulse repetition frequency of US on the release of EVs from myotubes.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>C2C12 myoblasts were used in this study. After differentiation into C2C12 myotubes, US was performed for 5 min at an intensity of 3.0 W/cm<sup>2</sup>, duty cycle of 20%, acoustic frequency of 1 MHz, and different pulse repetition frequencies (100 Hz, 10 Hz, or 1 Hz). After 12 h, EVs and cells were collected for subsequent analyses.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>US did not cause a reduction in cell viability across all US groups compared to the control. The concentration of EVs was significantly higher in all US groups compared to the control group. In particular, the highest increase was observed in the 1-Hz group on EV concentration as well as intracellular Ca<sup>2+</sup> level.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>This study investigated the effect of three different pulse repetition frequencies of US on the release of EVs from cultured myotubes. It is concluded that a low-pulse repetition frequency of 1 Hz is the most effective for enhancing EV release from cultured myotubes with pulsed ultrasound.</p>","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569268","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

Correction: Characterization of breast changes in the early gestational period on automated breast ultrasound. 更正：通过自动乳腺超声检查确定妊娠早期乳房变化的特征。

IF 1.8 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-03 DOI: 10.1007/s10396-024-01449-5

Tomoyuki Ohta

引用次数: 0

Correction: Investigation of a method to estimate the average speed of sound using phase variances of element signals for ultrasound compound imaging. 更正：研究一种利用超声复合成像元件信号的相位差估算平均声速的方法。

IF 1.8 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-03 DOI: 10.1007/s10396-024-01442-y

Ryo Nagaoka, M. Omura, Hideyuki Hasegawa

引用次数: 0

Mindset for performing EUS-FNA. 进行 EUS-FNA 的心态。

IF 1.9 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-01 Epub Date: 2024-05-16 DOI: 10.1007/s10396-023-01386-9

Atsushi Kanno

引用次数: 0

Evaluation of renal circulation in heart failure using superb microvascular imaging, a microvascular flow imaging system. 利用超级微血管成像（一种微血管流量成像系统）评估心力衰竭患者的肾循环。

IF 1.9 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-01 Epub Date: 2024-01-18 DOI: 10.1007/s10396-023-01397-6

Shohei Kikuchi, Kiyomi Kayama, Yu Kawada, Shuichi Kitada, Yoshihiro Seo

{"title":"Evaluation of renal circulation in heart failure using superb microvascular imaging, a microvascular flow imaging system.","authors":"Shohei Kikuchi, Kiyomi Kayama, Yu Kawada, Shuichi Kitada, Yoshihiro Seo","doi":"10.1007/s10396-023-01397-6","DOIUrl":"10.1007/s10396-023-01397-6","url":null,"abstract":"<p><strong>Purpose: </strong>Renal circulation evaluation is essential in understanding the cardiorenal relationship in heart failure (HF), and there is a growing interest in imaging techniques that visualize renal circulation. This study aimed to assess the effectiveness of superb microvascular imaging (SMI) in evaluating renal circulation in HF patients.</p><p><strong>Method: </strong>The study included 71 HF patients undergoing cardiac catheterization. Prior to catheterization, renal ultrasound examinations were performed. A control group of 18 subjects without HF was also included. SMI was used to measure the vascular index (VI), which was calculated as the percentage of blood flow signal area in the region of interest. The intrarenal perfusion index (IRPI) was determined as a fluctuation index of VI, reflecting variations in the number of blood cells moving through renal tissue during the cardiac cycle.</p><p><strong>Results: </strong>Using the upper 95% confidence interval of IRPI (0.6) from the control group, HF patients were classified into two groups. Patients with IRPI > 0.6 showed a more congestive profile. Right atrial pressure and biphasic or monophasic Doppler intrarenal flow pattern were independent determinants of IRPI > 0.6. In addition, IRPI remained a significant predictor of estimated glomerular filtration rate (eGFR).</p><p><strong>Conclusion: </strong>The parameter IRPI as variations in SMI signal during the cardiac cycle may be a useful evaluation method for renal perfusion impairment in HF.</p>","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139486327","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

Endoscopic ultrasound-guided fine-needle aspiration for gastrointestinal subepithelial lesions. 内窥镜超声引导下的胃肠道上皮下病变细针穿刺术。

IF 1.9 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-01 Epub Date: 2023-07-25 DOI: 10.1007/s10396-023-01342-7

Takuto Hikichi, Minami Hashimoto, Takumi Yanagita, Tsunetaka Kato, Jun Nakamura

引用次数: 0

Assessment of renal congestion in a rat model with congestive heart failure using superb microvascular imaging. 利用超级微血管成像技术评估充血性心力衰竭大鼠模型的肾充血情况。

IF 1.9 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-01 Epub Date: 2024-01-11 DOI: 10.1007/s10396-023-01396-7

Tomofumi Nakatsukasa, Tomoko Ishizu, Ruriko Hayakawa, Masumi Ouchi, Naoto Kawamatsu, Kimi Sato, Masayoshi Yamamoto, Tomoko Machino-Ohtsuka, Kunio Kawanishi, Yoshihiro Seo

{"title":"Assessment of renal congestion in a rat model with congestive heart failure using superb microvascular imaging.","authors":"Tomofumi Nakatsukasa, Tomoko Ishizu, Ruriko Hayakawa, Masumi Ouchi, Naoto Kawamatsu, Kimi Sato, Masayoshi Yamamoto, Tomoko Machino-Ohtsuka, Kunio Kawanishi, Yoshihiro Seo","doi":"10.1007/s10396-023-01396-7","DOIUrl":"10.1007/s10396-023-01396-7","url":null,"abstract":"<p><strong>Purpose: </strong>Renal congestion is a therapeutic target in congestive heart failure. However, its detailed evaluation in a clinical setting is challenging. This study sought to assess renal congestion impairment using superb microvascular imaging (SMI), a simple and accessible method.</p><p><strong>Methods: </strong>Dahl salt-sensitive rats, used as a model for congestive heart failure, underwent central venous pressure (CVP) measurements. Renal congestion was evaluated through measurements of renal medullary pressure (RMP) and assessment of renal perfusion using contrast-enhanced ultrasonography at both the early (control group) and heart failure phases (HF group). All rats were assessed with SMI. The region of interest (ROI) was set in interlobular vessels, interlobar vessels, and a combination of these areas. The area ratio was calculated from the color pixel count in the ROI divided by the total pixel count in the ROI. Intrarenal perfusion index (IRPI) was defined as (maximum area ratio-minimum area ratio) / maximum area ratio.</p><p><strong>Results: </strong>There were no significant differences in renal function and left ventricular ejection fraction between the two groups. CVP, time-to-peak (TTP) in the medulla, and RMP were higher in the HF group than in the control group. In the HF group, IRPI, evaluated in the interlobular vessels, was significantly higher than in the control group. IRPI was positively correlated with TTP in the medulla (p = 0.028, R = 0.60) and RMP (p < 0.001, R = 0.84), indicating that IRPI reflected renal congestion.</p><p><strong>Conclusions: </strong>IRPI is a useful tool for assessing renal congestion in rats with congestive heart failure.</p>","PeriodicalId":50130,"journal":{"name":"Journal of Medical Ultrasonics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139418386","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

Pursuing technological improvement of thyroid ultrasound-guided diagnostic biopsy and widespread adoption of medical safety. 追求甲状腺超声引导诊断活检的技术改进和医疗安全的广泛采用。

IF 1.9 4区医学

Journal of Medical Ultrasonics Pub Date : 2024-04-01 Epub Date: 2024-05-16 DOI: 10.1007/s10396-024-01450-y

Hisakazu Shindo

引用次数: 0