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Journal of Korean Neurosurgical Society > Volume 23(9); 1994 > Article
Journal of Korean Neurosurgical Society 1994;23(9): 1028-1037.
Diagnostic Value of Three-Dimensional Computed Tomographic Angiography(3-DCTA) in Intracranial Aneurysm.
Il Seung Choe, Young Soo Kim, Yong Ko, Seong Hoon Oh, Suck Jun Oh, Nam Kyu Kim, Kwang Myung Kim, Seung Ro Lee
1Department of Neurosurgery, College of Medicine, Hanyang University, Seoul, Korea.
2Department of Radiology, College of Medicine, Hanyang University, Seoul, Korea.
ABSTRACT
The authors have evaluated the efficacy of three dimensional computed tomographic angiography(3-DCTA) in diagnosing intracranial aneurysm. This literature studied thirty five patients harboing forty intracranial aneurysms using dynamic CT scan with intravenous contrast enhancement. After injection of 2 mg/kg of nonionic contrast material(RayvistR) intravenously, rapid dynamic CT scanning with thin section was performed. Three dimensional reconstruction was performed using the GE 9800 HR surface-rendering method with a threshold of about 100 Hounsfield units(HU). The authors comparatively analysed this 3-DCTA with conventional cerebral angiography to determine aneurysmal detection, shape, direction, and its relationships to surrounding vessels. While 3-DCTA clearly detected 38 aneurysms, conventional angiography did 37 ones. There was no significant difference between 3-DCTA and conventional angiography in demonstrating aneurysmal direction, but 3-DCTA was superior to conventional angiography in demonstrating aneurysmal shape, its neck and surrounding vascular structures. 3-DCTA showed deliberate anatomy of aneuysm and adjacent vessels through 3 dimensional image, and its operative view is helpful in surgical planning. 3-DCTA might be expected to substitute for conventional angiography in the near future.
Key Words: Aneurysm; Three-dimensional computed tomographic angiography; Conventional angiography
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