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Novel prep-less X-ray imaging capsule for colon cancer screening: a feasibility study
  1. Nathan Gluck1,
  2. Elizabeth E Half2,
  3. Vered Bieber3,
  4. Doron Schwartz4,
  5. Yulia Ron1,
  6. Ian Gralnek3,
  7. Amir Klein2,
  8. Jesse Lachter2,
  9. Moshe Shoni Levy5,
  10. Menachem Moshkowitz1,5,
  11. Nadir Arber1,5
  1. 1Department of Gastroenterology, Tel Aviv Sourasky Medical Centre, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
  2. 2Department of Gastroenterology, Rambam Health Care Campus, Haifa, Israel
  3. 3Department of Gastroenterology, Ha’emek Medical Centre, Technion Institute of Technology, Haifa, Israel
  4. 4Department of Gastroenterology, Soroka Medical Center, Ben-Gurion University, Beer Sheva, Israel
  5. 5Integrated Cancer Prevention Center, Tel Aviv Sourasky Medical Centre, Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
  1. Correspondence to Professor Nadir Arber, The Integrated Cancer Prevention Center, Tel-Aviv Sourasky Medical Center, Tel-Aviv 6423906, Israel; nadira{at}tlvmc.gov.il

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The X-ray imaging capsule overcomes the requirement for bowel preparation, a major deterrent for colorectal cancer (CRC) screening. This prospective multicentre study examined capsule safety and efficacy (compared with fecal immunochemical test (FIT)) for polyp detection confirmed by ensuing colonoscopy. In 45 analysed patients, capsule and FIT sensitivity for polyps was 44% and 37%, respectively. Capsule sensitivity increased to 78% when >50% of the colon surface area was imaged, with a linear correlation between imaged area and sensitivity. An updated scanning algorithm, retrospectively implemented on these study data, dramatically increased numbers of subjects with imaged area >50%, from 21 to 41/45 (46% to 91%). Capsule specificity for polyps approached 90%. Transit time was 52±32 hours. No device-related serious adverse events occurred. Average X-ray dose was 0.05 mSv.

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Many patients forego screening by colonoscopy due to the need for cathartic preparation,1 2 posing a major obstacle to implementation of current screening programmes.3 4 A test not requiring laxative preparation could increase adherence with screening.1 Moreover, inadequate preparation for colonoscopy impairs adenoma and cancer detection rates and often necessitates repeating of the procedure.5 A prep-less modality would not suffer from these limitations. In a previous proof-of-concept study, a prep-less screening capsule was shown to be safe, capable of 3D reconstruction of the colonic wall and lumen and identifying adenomatous polyps.6 In a prospective multicentre comparative study, we studied the safety and efficacy of a first version of the capsule for identifying colonic polypoid lesions and masses compared with FIT and colonoscopy.

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