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Minaguchi T, Yamamiya A, Tominaga K, Kashima K, Kunogi Y, Sakuma F, Fukushi K, Nagashima K, Izawa N, Yamabe A, Hoshi K, Iijima M, Goda K, Haruyama Y, Irisawa A. Measuring optimal ultrasound speed using endoscopic ultrasound in patients with chronic pancreatitis, including early stage. Dig Endosc 2022; 34:1214-1221. [PMID: 35108413 DOI: 10.1111/den.14261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 01/17/2022] [Accepted: 01/30/2022] [Indexed: 02/08/2023]
Abstract
OBJECTIVES Ultrasound speed (USS) correction improves image quality by estimating the optimal USS correcting the deviation from a predetermined USS. This study assessed USS differences between chronic pancreatitis (CP), early CP (ECP), and normal pancreas when using endoscopic ultrasound (EUS). The usefulness of measuring optimal USS was evaluated for patients with CP, including early stage patients. METHODS This study enrolled 116 consecutive patients for whom USS was measured using an EUS system. The USS correction principle is generation of a B-mode image by changing the USS in all ranges while correcting the delay in the received data. Final diagnoses were made according to the Japanese diagnostic criteria for CP in 2019. They were classified as CP, ECP, or normal. We compared USS applied for these three groups. RESULTS The medians and ranges of USS values for patients in the normal, ECP, and CP groups were 1506.0 (1407-1600) m/s, 1580.0 (1520-1630) m/s, and 1574.0 (1537-1610) m/s, respectively. The USS values of the ECP and CP groups were significantly higher than those of the normal group (P < 0.001). Analyses of the receiver operating characteristic curve in the normal pancreas, ECP, and CP revealed the area as 0.957, with specificity and sensitivity of 95.9% and 87.5%, respectively, using the USS of 1535 m/s as a cut-off. CONCLUSION Measurement of USS might be particularly useful for distinguishing between normal and ECP imaging.
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Affiliation(s)
- Takahito Minaguchi
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Akira Yamamiya
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Keiichi Tominaga
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Ken Kashima
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Yasuhito Kunogi
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Fumi Sakuma
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Koh Fukushi
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Kazunori Nagashima
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Naoya Izawa
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Akane Yamabe
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Koki Hoshi
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Makoto Iijima
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Kenichi Goda
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Yasuo Haruyama
- Integrated Research Faculty for Advanced Medical Sciences, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Atsushi Irisawa
- Department of Gastroenterology, Dokkyo Medical University School of Medicine, Tochigi, Japan
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