Effectiveness of Using Low-Dose Computed ...

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Hiroaki Shibata1, Hideko Onoda2,Teppei Yonezawa3, Takeshi Okamoto1,Jun Nishikawa1, ..... Kobayashi Y, Yamada A, Watabe H, et al: Sonographic detec-.
Οriginal Paper

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STOMACH

Effectiveness of Using Low-Dose Computed Tomography to Assess Patency in Gastrointestinal Tracts with a Patency Capsule  Tomohiro Shirasawa1, Shinichi Hashimoto1, Kensaku Shimizu2, Ryo Kawasato1, Takayuki Yokota1, Hiroaki Shibata1, Hideko Onoda2, Teppei Yonezawa3, Takeshi Okamoto1, Jun Nishikawa1, Naofumi Matsunaga2 and Isao Sakaida1 Department of Gastroenterology and Hepatology, 2Department of Radiology, Yamaguchi University Graduate School of Medicine, and 3Department of Radiological Technology, Yamaguchi University Hospital, Yamaguchi, Japan 1

 Corresponding author: Shinichi Hashimoto, Department of Gastroenterology and Hepatology, Yamaguchi University

Key Words:

Capsule endoscopy; Patency capsule; Gastrointestinal tract; Lowdose computed tomography.

ABSTRACT

Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan; Tel.: +81-836-22-2241; Fax: +81-836-22-2240; E-mail: [email protected]

Background/Aims: A patency capsule (PC) is used to safely perform capsule endoscopy. When the PC is not excreted within the defined time frame, radiography often cannot localize the PC. Computed tomography (CT) localizes a PC more definitively than radiography. We evaluated the localization of PCs using low-dose (LD)-CT. Methodology: Forty-nine patients received a PC and 33 did not excrete the PC within the defined time frame and underwent radiography and LDCT with a 90% exposure reduction. Results: LDCT localized the PC in 31 patients (93.9%), whereas radiography localized it in 7 (21.2%), indicating a significantly higher detection rate with LDCT (P