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Hashizume K, Hirooka Y, Kawashima H, Ohno E, Ishikawa T, Kawai M, Suhara H, Takeyama T, Koya T, Tanaka H, Sakai D, Yamamura T, Furukawa K, Funasaka K, Nakamura M, Miyahara R, Watanabe O, Ishigami M, Kuwahara T, Hashimoto S, Goto H. The Propagation Display Method Improves the Reproducibility of Pancreatic Shear Wave Elastography. Ultrasound Med Biol 2019; 45:2242-2247. [PMID: 31103347 DOI: 10.1016/j.ultrasmedbio.2019.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 03/02/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
Evaluation of the pancreatic elastic modulus (PEM) using shear wave elastography (SWE) requires at least 5 measurements to ensure reproducibility. The aim of this study was to evaluate improvement in reproducibility of SWE, using the propagation display method in normal pancreas ([NP] phase 1) and to examine the differences in PEM between NP and chronic pancreatitis (CP), intraductal papillary mucinous neoplasm (IPMN) and autoimmune pancreatitis ([AIP] phase 2). In phase 1, the measurement success rate, median PEM in repeated measurements and appropriate number of SWE measurements were determined in 109 cases with NP. In phase 2, PEM was measured in CP (n = 10), IPMN (n = 31) and AIP (n = 5), using the required number of SWE measurements determined in phase 1. In phase 1, the measurement success rate was 93.9% (92/109 cases). The median PEM for NP was 14.6 kPa and the appropriate number of SWE measurements was at least 3. In phase 2, the median PEMs in CP, IPMN and AIP were 19.6, 18.1 and 17.2 kPa, respectively, with significant differences between NP and CP (p = 0.0133) and between NP and IPMN (p = 0.0436). Use of the propagation display method in SWE improves the reproducibility of measurement of PEM.
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Affiliation(s)
- Kiyotaka Hashizume
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Yoshiki Hirooka
- Department of Endoscopy, Nagoya University Hospital, Nagoya, Japan.
| | - Hiroki Kawashima
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Eizaburo Ohno
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Takuya Ishikawa
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Manabu Kawai
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Hiroki Suhara
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Tomoaki Takeyama
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Toshinari Koya
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Hiroyuki Tanaka
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Daisuke Sakai
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Takeshi Yamamura
- Department of Endoscopy, Nagoya University Hospital, Nagoya, Japan
| | | | - Kohei Funasaka
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Masanao Nakamura
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Ryoji Miyahara
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Osamu Watanabe
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Masatoshi Ishigami
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
| | - Takamichi Kuwahara
- Department of Gastroenterology, Aichi Cancer Center Hospital, Nagoya, Japan
| | - Senju Hashimoto
- Department of Liver, Biliary Tract and Pancreas Diseases, Fujita Health University, Toyoake, Japan
| | - Hidemi Goto
- Department of Gastroenterology and Hepatology, Nagoya University Graduate, School of Medicine, Nagoya, Japan
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