A model of deformable rings for interpretation of wireless capsule endoscopic videos

Piotr M. Szczypiński, Ram D. Sriram, Parupudi V.J. Sriram, D. Nageshwar Reddy

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


Wireless Capsule Endoscopy (WCE) provides a means to obtain a detailed video of the small intestine. A single session with WCE may produce nearly 8 h of video. Its interpretation is tedious task, which requires considerable expertise and is very stressful. The Model of Deformable Rings (MDR) was developed to preprocess WCE video and aid clinicians with its interpretation. The MDR uses a simplified model of a capsule's motion to flexibly match (register) consecutive video frames. Essentially, it computes motion-descriptive characteristics and produces a two-dimensional representation of the gastrointestinal (GI) tract's internal surface - a map. The motion-descriptive characteristics are used to indicate video fragments which exhibit segmentary contractions, peristalsis, refraction phases and areas of capsule retention. Within maps, certain characteristics that indicate areas of bleeding, ulceration and obscuring froth could be recognized. Therefore, the maps allow quick identification of such abnormal areas. The experimental results demonstrate that the number of discovered pathologies and gastrointestinal landmarks increases with the MDR technique.

Original languageEnglish (US)
Pages (from-to)312-324
Number of pages13
JournalMedical Image Analysis
Issue number2
StatePublished - Apr 2009
Externally publishedYes


  • Deformable models
  • Gastrointestinal system
  • Model of deformable rings
  • Video analysis
  • Wireless capsule endoscope

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Computer Vision and Pattern Recognition
  • Health Informatics
  • Computer Graphics and Computer-Aided Design


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