CT angiography can help clinicians detect cerebral aneurysms smaller than 3 mm.
CT angiography accurately detects small cerebral aneurysms smaller than 3 mm, according to a study published in Radiology.
Researchers from China performed a retrospective study to assess the accuracy of CT angiography for the diagnosis of cerebral aneurysms that were 5 mm or smaller, using digital subtraction angiography (DSA) as a reference standard.
The study group included 1,366 patients who underwent both CT angiography and DSA. Two readers assessed CT performance for depiction of aneurysms, size, location, and status of rupture.
The results showed DSA detected 711 small aneurysms in 579 patients. Using DSA as the reference standard the researchers found:
The researchers noted that the sensitivities of CT angiography were lower for detection of aneurysms smaller than 3 mm and unruptured compared with aneurysms that were 3 to 5 mm and ruptured. There were no differences for the sensitivities of CT angiography for diagnosis of aneurysms in the anterior versus posterior circulation. Excellent or good interreader agreement was found for detection of intracranial aneurysms on a per-patient and per-aneurysm basis.
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.