Multidetector CT without oral contrast can be effective on larger patients presenting with acute abdominal pain.
Contrast is not needed for all patients undergoing multidetector CT (MDCT) for investigation of acute abdominal pain in the emergency room, according to a study published in the Canadian Association of Radiologists Journal.
Researchers from Canada performed a retrospective study to determine if eliminating oral contrast for MDCT affected the detection of acute abdominal abnormalities in patients presenting to the ER.
A total of 375 patients were included in the study, which took place from November 1, 2102 to October 21, 2013. There were 174 males and 201 females, with a mean age of 57. All patients presented with complaints of acute abdominal pain, and their body mass index was above 25. Patients who had BMI of less than 25 were given the oral contrast.[[{"type":"media","view_mode":"media_crop","fid":"43479","attributes":{"alt":"oral contrast","class":"media-image media-image-right","id":"media_crop_2989958619925","media_crop_h":"0","media_crop_image_style":"-1","media_crop_instance":"4745","media_crop_rotate":"0","media_crop_scale_h":"0","media_crop_scale_w":"0","media_crop_w":"0","media_crop_x":"0","media_crop_y":"0","style":"height: 100px; width: 100px; border-width: 0px; border-style: solid; margin: 1px; float: right;","title":"©Mr Aesthetics/Shutterstock.com","typeof":"foaf:Image"}}]]
The results showed that seven of 375 (1.9%) of the patients required a repeat CT examination with oral contrast within seven days of their initial scan, although none of these patients required a change in the course of their management following the scan with the oral contrast. No delayed or missed diagnoses related to the absence of oral contrast were identified.
The authors concluded that patients with a BMI over 25 who presented to the ER with acute abdominal pain did not require oral contrast for MDCT, which allows for quicker screening.
Stay at the forefront of radiology with the Diagnostic Imaging newsletter, delivering the latest news, clinical insights, and imaging advancements for today’s radiologists.
Study Shows Enhanced Diagnosis of Coronary Artery Stenosis with Photon-Counting CTA
July 10th 2025In a new study comparing standard resolution and ultra-high resolution modes for patients undergoing coronary CTA with photon-counting detector CT, researchers found that segment-level sensitivity and accuracy rates for diagnosing coronary artery stenosis were consistently > 89.6 percent.
Can CT-Based Deep Learning Bolster Prognostic Assessments of Ground-Glass Nodules?
June 19th 2025Emerging research shows that a multiple time-series deep learning model assessment of CT images provides 20 percent higher sensitivity than a delta radiomic model and 56 percent higher sensitivity than a clinical model for prognostic evaluation of ground-glass nodules.