CT Colonography Dose of 100 kVp as Effective as 120 kVp
Reducing the CT colonography radiation dose from 120 kVp to 100 kVp resulted in a significant decrease in dose but minimal decrease in 3D image quality.
Reducing the CT colonography radiation dose from 120 kVp to 100 kVp resulted in a significant decrease in radiation dose but only minimal decrease in 3D image quality, according to a study in the journal Radiology.
Researchers from Brown University assessed the effect of decreasing tube voltage on dose, contrast-to-noise (CNR) ratio, and 3D image quality in patients undergoing CT colonography. To do so, they looked at 63 consecutive patients who underwent CT colonography supine (at 100 kVp) and prone (11 kVp). All recorded data were stratified by patient anteroposterior diameter in order to determine effects of patient size.
The results showed that there was a 20 percent decrease in volume CT dose index (CTDIvol) and a 16 percent decrease in dose-length (DLP) when tube voltage was decreased. There was also an increase in image noise of 32 percent with the lower dose. Mean attenuation in tagged fluid increased from 395 to 487 HU, but there was no change in mean CNR of tagged fluid regardless of patient size.
Regarding image quality, the researchers found that there was only a slight decrease in 3D quality, from a median score of 4 out of 5, down from 5 out of 5.
Study Examines CT-Based AI Detection of Incidental Abdominal Aortic Aneurysms
April 29th 2025The AI software Viz AAA offered a sensitivity of 87.5 percent in detecting abdominal aortic aneurysms on contrast-enhanced CT, according to new retrospective research presented at the American Roentgen Ray Society (ARRS) conference.
The Reading Room: Racial and Ethnic Minorities, Cancer Screenings, and COVID-19
November 3rd 2020In this podcast episode, Dr. Shalom Kalnicki, from Montefiore and Albert Einstein College of Medicine, discusses the disparities minority patients face with cancer screenings and what can be done to increase access during the pandemic.
What is the Best Use of AI in CT Lung Cancer Screening?
April 18th 2025In comparison to radiologist assessment, the use of AI to pre-screen patients with low-dose CT lung cancer screening provided a 12 percent reduction in mean interpretation time with a slight increase in specificity and a slight decrease in the recall rate, according to new research.
Meta-Analysis Shows Merits of AI with CTA Detection of Coronary Artery Stenosis and Calcified Plaque
April 16th 2025Artificial intelligence demonstrated higher AUC, sensitivity, and specificity than radiologists for detecting coronary artery stenosis > 50 percent on computed tomography angiography (CTA), according to a new 17-study meta-analysis.
