False-positive Intracranial Aneurysms on MR Angiography: Incidence and Causes
Journal of the Korean Radiological Society
;
: 307-314, 2007.
Article
in Korean
| WPRIM
| ID: wpr-150314
ABSTRACT
PURPOSE:
The purpose of this study is to analyze the incidence and causes of false-positive intracranial aneurysms on MR angiography (MRA). MATERIALS ANDMETHODS:
We retrospectively evaluated 210 cases that were incidentally diagnosed as intracranial aneurysms on MRA. All the cases were confirmed by CT angiography (CTA) or digital subtraction angiography (DSA). We investigated the incidence, location, size, and causes of the false-positive aneurysms on MRA.RESULTS:
Of 210 cases, 28 cases were confirmed as false-positive aneurysms. Most of the lesions were located on the middle cerebral artery (n = 9, 7 lesions located in the bifurcation and 2 lesions located in the trunk) and the anterior communicating artery (n = 5). The diameters of most of the lesions (78.6%) were smaller than 3 mm. Causes were junctional dilatation (n = 14), vascular tortuosity (n = 6), normal variation (n = 3) and unknown causes (n = 3).CONCLUSION:
Understanding the risks and pitfalls of false-positive intracranial aneurysms determined on MRA would be helpful for improving the diagnostic accuracy of screening MRA and for reducing the number of unnecessary invasive examinations.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arteries
/
Angiography
/
Angiography, Digital Subtraction
/
Intracranial Aneurysm
/
Mass Screening
/
Incidence
/
Retrospective Studies
/
Magnetic Resonance Angiography
/
Middle Cerebral Artery
/
Dilatation
Type of study:
Etiology study
/
Incidence study
/
Observational study
/
Prognostic study
/
Screening study
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
2007
Type:
Article
Similar
MEDLINE
...
LILACS
LIS