The use of three-dimensional computed tomographic angiography in the accurate diagnosis of internal carotid artery aneurysms: degree for expression of posterior communicating and anterior choroidal arteries.
We have improved the scan protocol of three-dimensional computed tomographic angiography (3D-CTA) to maximize the accuracy of examining unruptured cerebral aneurysms. Sixty-seven cases of suspected internal carotid-posterior communicating (Pcom) and internal carotid-anterior choroidal (Ant Cho) artery aneurysms were evaluated as to the opacification of arteries. In the 46 cases of suspected fetal-type Pcom and Ant Cho aneurysms, the arteries were opacified from its origin to the periphery in all cases. A final diagnosis of the presence of an aneurysm was made possible by complete opacification. A definite diagnosis was impossible to make in only ten cases having adult-type Pcom. In conclusion, 3D-CTA, using our own scan protocol, was proven to be quite useful for making a more accurate diagnosis.
Kurokawa
Y
Y
Division of Neurosurgery, Obihiro Neurosurgical Hospital, Obihiro, Japan.
Yonemasu
Y
Y
Kano
H
H
Sasaki
T
T
Inaba
K
K
Shigeno
S
S
Shimizu
T
T
Nitta
A
A
Kaho
H
H
D000328:Adult; D000368:Aged; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging* / Q000473:pathology*; D002831:Choroid Plexus / Q000098:blood supply*; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*