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Performance of Given suspected blood indicator
Suthat Liangpunsakul1, Lori Mays, Douglas K Rex
1Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, 550 N. University Boulevard, UH 4100, Indianapolis, IN 46202, USA.
The American Journal of Gastroenterology
|December 23, 2003
Summary
The suspected blood indicator (SBI) software shows high accuracy in detecting actively bleeding small bowel lesions during wireless capsule endoscopy (WCE). While not a replacement for physician review, SBI can serve as a valuable screening tool for identifying gastrointestinal bleeding.
Area of Science:
- Gastroenterology
- Medical Imaging
- Endoscopy
Background:
- Wireless capsule endoscopy (WCE) is a key tool for visualizing the small bowel.
- Automated detection of gastrointestinal bleeding can improve WCE analysis efficiency.
- The suspected blood indicator (SBI) function in WCE software aims to identify and flag potential bleeding sites.
Purpose of the Study:
- To evaluate the accuracy and sensitivity of the SBI software in detecting small bowel lesions.
- To assess the role of SBI in the interpretation of WCE studies.
- To compare SBI findings with expert gastroenterologist reviews.
Main Methods:
- Reviewed WCE reports from October-November 2002.
- Experienced gastroenterologists reviewed WCE images at 15 frames/s.
- Compared findings from gastroenterologists with those identified by SBI.
- Defined significant lesions as arteriovenous malformations (AVMs), ulcers, erosions, and active bleeding sites.
Main Results:
- A total of 109 lesions were identified by gastroenterologists in 24 patients.
- SBI identified 31 potential blood areas, correctly identifying 28 lesions.
- SBI demonstrated an overall sensitivity of 25.7% and accuracy of 34.8% for significant lesions.
- For actively bleeding lesions, SBI achieved 81.2% sensitivity, 90% positive predictive value, and 83.3% accuracy.
Conclusions:
- SBI shows good sensitivity and positive predictive value for actively bleeding small bowel lesions.
- Physician review remains essential for complete WCE study interpretation.
- SBI can function as a complementary, rapid screening tool for identifying active gastrointestinal bleeding.