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Performing an additional decubitus series at CT colonography.

Christopher M Buchach¹, David H Kim, Perry J Pickhardt

¹Department of Radiology, University of Wisconsin School of Medicine and Public Health, Clinical Science Center, Madison, 53792-3252, USA.

Abdominal Imaging

|December 25, 2010

Summary

The rate of performing an extra decubitus series during CT colonography (CTC) varies significantly based on the reason for the exam, where it

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Area of Science:

Radiology
Medical Imaging
Gastroenterology

Background:

CT colonography (CTC) is a minimally invasive imaging technique.
Standard CTC protocols include supine and prone imaging.
An additional decubitus series may be acquired to address specific diagnostic challenges.

Purpose of the Study:

To determine the frequency of acquiring an additional decubitus series in CT colonography.
To identify factors associated with the decision to obtain a decubitus series.

Main Methods:

Retrospective review of 6,380 adult CTC examinations performed at three centers.
Analysis of decubitus series acquisition based on indication, practice site, patient demographics, and temporal trends.
CT technologists primarily determined the need for the additional series.

Main Results:

The decubitus series rate was 9.7% for screening and 22.9% for diagnostic exams after incomplete colonoscopy.
Rates varied significantly by practice site (9.4% academic vs. 34.6% community).
Acquisition increased with patient age and body mass index (BMI), and showed temporal variation.

Conclusions:

The use of an additional decubitus series in CTC is inconsistent.
Factors such as indication, site, patient age, and BMI influence its acquisition.
Standardization of training and feedback for CT technologists is recommended.