Prone transabdominal ultrasonography improves pancreatic tail visualization: a prospective study using CT-ultrasound fusion imaging.

IF 2.1 4区医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Journal of Medical Ultrasonics Pub Date : 2026-08-11 DOI:10.1007/s10396-026-01673-1

Ryohei Kumano, Takuya Ishikawa, Kentaro Yamao, Yasuyuki Mizutani, Tadashi Iida, Kenta Yamamoto, Takeshi Yamamura, Kazuhiro Furukawa, Takashi Honda, Hiroki Kawashima

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引用次数: 0

Abstract

Purpose: To determine whether prone-position transabdominal ultrasonography improves pancreatic tail visualization compared with conventional supine scanning, as assessed using computed tomography-transabdominal ultrasonography (CT-TUS) fusion imaging.

Methods: This prospective observational study included 50 patients (34 males; median age, 64.5 [interquartile range, 56.5-72] years) undergoing evaluation for pancreatobiliary diseases using TUS and contrast-enhanced CT. Using Smart Fusion technology, CT and real-time TUS images were synchronized, and the pancreatic tail visualization rate was compared between the images obtained in supine and prone positions. Interobserver agreement for the measurable tail length in the prone position was assessed using the intraclass correlation coefficient (ICC: 3,1). Factors associated with pancreatic tail visualization, including sex, age, height, waist circumference, pancreatic tail length and abnormalities, and the renal-pancreatic tail distance, were analyzed using univariate and multivariate regression analyses.

Results: The pancreatic tail visualization rate, i.e., proportion of the total tail length visible on TUS compared with that on CT scan, was 37.4% with supine transverse epigastric scanning combined with left subcostal scanning, which was significantly higher (58.2%) when left subcostal scanning was replaced by prone scanning (P < 0.001). Multivariate analysis revealed that increased age was associated with decreased visualization, whereas pancreatic tail abnormalities and a shorter renal-pancreatic tail distance were significantly associated with improved visualization. The interobserver agreement was excellent (ICC [3,1]: 0.903).

Conclusion: Prone-position scanning significantly improves pancreatic tail visualization compared with the conventional supine method and represents a simple and noninvasive modification of routine ultrasonographic practice.

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俯卧经腹超声检查改善胰腺尾部可视化：一项使用ct -超声融合成像的前瞻性研究。

目的：通过计算机断层扫描-经腹超声（CT-TUS）融合成像，确定与传统仰卧位扫描相比，俯卧位经腹超声检查是否能改善胰腺尾部的可见性。方法：本前瞻性观察性研究纳入50例患者，其中男性34例，中位年龄64.5岁[四分位数间距56.5-72]岁)，采用超声心动图和增强CT对胰胆道疾病进行评估。采用Smart Fusion技术，同步CT和实时TUS图像，比较仰卧位和俯卧位胰腺尾部图像的显示率。使用类内相关系数（ICC: 3,1）评估了俯卧位置可测量尾巴长度的观察者间一致性。胰尾显像的相关因素包括性别、年龄、身高、腰围、胰尾长度和异常情况以及肾-胰尾距离，采用单因素和多因素回归分析。结果：仰卧位腹横扫联合左肋下扫描胰腺尾部显像率为37.4%，即在TUS上可见的总尾部长度占CT扫描的比例，而用俯卧位代替左肋下扫描胰腺尾部显像率为58.2% (P)。与传统的仰卧位方法相比，俯卧位扫描可显著提高胰腺尾部的可见性，是对常规超声检查的一种简单、无创的改进。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Medical Ultrasonics 医学-核医学

CiteScore

3.30

自引率

11.10%

发文量

102

审稿时长

>12 weeks

期刊介绍： The Journal of Medical Ultrasonics is the official journal of the Japan Society of Ultrasonics in Medicine. The main purpose of the journal is to provide forum for the publication of papers documenting recent advances and new developments in the entire field of ultrasound in medicine and biology, encompassing both the medical and the engineering aspects of the science.The journal welcomes original articles, review articles, images, and letters to the editor.The journal also provides state-of-the-art information such as announcements from the boards and the committees of the society.