Evaluation of cerebral aneurysms with helical CT: correlation with conventional angiography and MR angiography

Radiology. 1994 Sep;192(3):717-22. doi: 10.1148/radiology.192.3.8058939.


Purpose: To evaluate detection of intracranial aneurysms with helical computed tomography (CT) and compare the results with those of conventional angiography and magnetic resonance (MR) angiography.

Materials and methods: Twenty-one patients with 30 intracranial aneurysms were studied with helical CT and conventional angiography; 17 of the patients (24 aneurysms) also underwent MR angiography.

Results: All aneurysms 3 mm or larger in greatest dimension were seen with helical CT and MR angiography; no aneurysms smaller than 3 mm were apparent with either modality. Of the 21 aneurysms demonstrated with both helical CT and MR angiography, 11 were seen equally well with both techniques; six were seen better with helical CT owing to flow-related or motion artifact at MR angiography, and four were seen better with MR angiography because calcium partially obscured them at helical CT.

Conclusion: Helical CT is a promising noninvasive method of imaging the intracranial vasculature and is comparable with standard MR angiographic techniques in demonstrating aneurysms.

Publication types

  • Comparative Study

MeSH terms

  • Cerebral Angiography*
  • Cerebral Arteries / pathology
  • Humans
  • Intracranial Aneurysm / diagnosis*
  • Intracranial Aneurysm / diagnostic imaging
  • Magnetic Resonance Imaging*
  • Tomography, X-Ray Computed*