No abstract available.
Cerebral Angiography*

No abstract available.
Atherosclerosis ; Cerebral Angiography ; Infarction, Middle Cerebral Artery

A fenestration of the supraclinoid internal carotid artery (ICA) is a rare congenital condition. We report an aneurysm arising from the proximal end of an ICA fenestration that was treated by endovascular coiling. Three-dimensional rotational angiography of preoperative cerebral angiography provided an understanding of the complex anatomy of the aneurysms associated with the fenestration and may facilitate the clinical decision regarding the treatment option. Endovascular coiling appears to be safe and effective for treating an aneurysm originating from a fenestration on the supraclinoid ICA, which is a difficult lesion to treat using a conventional surgical approach.
Aneurysm ; Angiography ; Carotid Artery, Internal ; Cerebral Angiography

The azygous anterior cerebral artery (ACA) is a rare type of ACA anomaly. In the conventional angiography, cognition of its realm is difficult without considerable reading. Clinically, misreading its nature causes confusion during the surgical approach to its associated cerebral aneurysm. We report this rare clinical experience with an angiographic and surgical review.
Aneurysm ; Angiography ; Anterior Cerebral Artery ; Cerebral Angiography ; Cognition ; Intracranial Aneurysm

Rare middle cerebral artery (MCA) fenestration and unruptured aneurysms of the both MCA bifurcations was discovered by CT angiography and confirmed during surgery. An aneurysm arising from the left MCA bifurcation was clipped. The postoperative course was excellent. The authors discuss the pathogenesis and clinical meanings of the MCA fenestration.
Aneurysm* ; Angiography ; Middle Cerebral Artery*

No abstract available.
Absorption* ; Cerebral Angiography ; Embolism, Air

Radionuclide cerebral angiography is a indirect method of measuring cerebral blood flow in ischmic cerebrovascular disease, but conventional radionuclide cerebral angiogra phy has been interpretated by simple inspection without quantification. We designed this study to obtain the quantitative data via computerized time-activity analysis of the radionuclide cerebral angiography in region of interest. In 30 persons without evidence of cerebrovascular disease right/left ratios were 0.993+0.252(mean+ 2SD) in antenor cerebral artery territories of the cerebral hemisphere and 0.947 0.186(mean+2SD) in middle cerebral artery territories. Thirteen patients of 33 patients(39.4%) with ischemic cerebrovascular disease had right / left ratios that were beyond 2 standard deviation of the normal mean. We suggest this study is valuable in patients suspected Gf cerebrovascular disease while this method will require extensive study.
Cerebral Angiography* ; Cerebral Arteries ; Cerebrum ; Humans ; Middle Cerebral Artery

PURPOSE: The purpose of this study was to assess the relative diagnostic capability of magnetic resonance angiography(MRA) and CT angiography(CTA) in the evaluation of intracranial aneurysm. MATERIALS AND METHODS: MRA and CTA were performed in 14 intracranial aneurysms (Including four which were ruptured) confirmed in the II patients involved by conventional angiography(CA). The size(in largest dimension) of the aneurysms ranged between 3 mm and 20 mm and the mean was 10.5 mm. For MRA, the 3D TOF method, with magnetization transfer suppression, wasused at 1.5T. For CTA, twenty seconds after beginning the injection of contrast media(100mL with use of a power injector at the rate of 3 mL/sec), CT scanning(30-second exposure and 60-mm length) was performed with a table speed of 2 mm/sec and a section thickness of 2mm. The resulting data were reformatted by MIP. MRA and CTA were compared with regard to the detection of aneurysms and their neck, size, shape, direction, intensity and relationship to adjacent bony structures or vessels. RESULTS: All aneurysms were clearly visualized with CTA. Inone case with a 3-mm aneurysm, however, this was not defined on MRA. Of the 13 aneurysms demonstrated by both MRA and CTA, eight were seen equally well with both modalities. CTA was considered to be superior to MRA in fivecases, either because calcification in the aneurysm wall was seen only on CTA(n = 3) or because the relationship with adjacent bony structures were seen better with CTA(n = 2). With CTA, the intensities of the aneurysm were homogeneous in all cases ; with MRA, however, the intensities of three large aneurysms were different. CONCLUSION: MRA and CTA may be useful in the evaluation of intracranial aneurysm, CTA has specific advantages over MRA inthe evaluation of large aneurysms, calcification of aneurysm wall and relationship with adjacent bony structure.
Aneurysm ; Angiography* ; Cerebral Angiography ; Intracranial Aneurysm* ; Magnetic Resonance Angiography* ; Neck

We report the imaging features of four cases with calcified intracranial aneurysm. All four patients underwentCT, CT angiography, MR, magnetic resonance angiography, and angiography. Calcification of the aneurysm wall was clearly demonstrated with CT and CTA in all cases and with conventional angiography in one case. The shape of calcification was curvilinear in two cases and punctate in two. On MR, two curvilinear calcifications were demonstrated as peripheral rim of signal void but two punctate calcifications were not shown.
Aneurysm* ; Angiography ; Cerebral Angiography ; Humans ; Intracranial Aneurysm ; Magnetic Resonance Angiography

OBJECTIVE: We examined the incidence of fenestration in the proximal segment of the anterior cerebral artery(ACA) and reviewed its clinical significance. METHODS: Cerebral angiography was performed in 843 patients and magnetic resonance angiography(MRA) in 1,787; all patients had, or were suspected to have, cerebrovascular disease. We subsequently reviewed the angiography and MRA data. RESULTS: Fourteen patients (six men and eight women, 35~81 years of age, median age = 67 years) had proximal ACA fenestrations. Three of the 843 patients (0.36%) undergoing cerebral angiography had fenestrations of proximal ACA as did eleven of the 1,787 MRA patients (0.62%). Seven fenestrations were located on the right side and seven fenestrations were located on the left side. The fenestrated ACA in one patient was associated with a saccular aneurysm at its proximal end. None of the 120 patients who underwent both conventional cerebral angiography and cranial MRA showed fenestration of proximal ACA. CONCLUSION: Although fenestration of ACA has little clinical significance, knowledge and recognition of this condition is important in the interpretation of cerebral images, especially during neurosurgical procedures.
Aneurysm ; Angiography* ; Anterior Cerebral Artery* ; Cerebral Angiography ; Female ; Humans ; Incidence* ; Magnetic Resonance Angiography* ; Male ; Neurosurgical Procedures