The total number of true positive, false positive, true negative, and false negative CT angiograms were 3046, 7, 737, and 33, respectively. The overall sensitivity and specificity were 98.9% (98.4–99.2) and 99.1% (98.0–99), respectively. The positive and negative predictive values were ...
Background and Purpose—Collateral flow can determine ischemic core and tissue at risk. Using the Interventional Management of Stroke (IMS) III trial data, we explored the relationship between computed tomography angiogram (CTA) collateral status and CT perfusion (CTP) parameters. Methods—Baseline CTA...
Intracranial aneurysms: detection with three-dimensional CT angiography with volume rendering--comparison with conventional angiographic and surgical findi... To assess the diagnostic accuracy of three-dimensional (3D) computed tomographic (CT) angiography for intracranial aneurysms.The 3D CT angiograms ...
First, serial angiograms using Fuji Computed ... Y Ishiwata,G Gondo,T Yamashita - 《Surgery for Cerebral Stroke》 被引量: 0发表: 1988年 ANGIOGRAPHY METHOD AND APPARATUS A two-dimensional slice formed of pixels (376) is extracted from the angiographic image (76) after enhancing the vessel ...
Out of 13 patients who have had abnormal LP results suggestive of SAH, 6 patients under went CT angiogram and 6 have had magnetic resonance angiogram. These confirmed one AVM and one aneurysm. Conclusions Significant number of our patients (13%) who have had initially normal CT head and ...
The results of 5184 carotid angiograms were reviewed and five cases of intracranial extravasation of contrast medium were found. In two cases an aneurysm r... D,M,Allan,... - 《British Journal of Radiology》 被引量: 13发表: 1977年 Ruptured aneurysm with extravasation observed in four-dimensi...
After an unenhanced CT of the whole brain, and before a CT-angiogram (CTA) of the carotid and vertebral arteries and a postcontrast CT of the brain, sixteen 5-mm-thick sections are selected to include the level of the basal ganglia and centrum semi-ovale, where all three supratentorial ...
Digital subtraction coronary angiograms (DSA) of 63 patients who had undergone coronary angioplasty (PTCA) for a total of 73 lesions were analyzed with an automated border-detecting computer program capable of simultaneous geometric and ... D Katritsis,DA Lythall,MH Anderson,... - 《American He...
Conclusion: In our patients with acute nontraumatic SAH and negative cerebral catheter angiograms, CT studies showed perimesencephalic blood in 10 and were normal in 8. Emergency catheter cerebral angiography is probably not needed in these patients and MR angiography may be sufficient to evaluate ...
The physicians have access to all of the DICOM series, original reports, clinical history, and previous and follow-up examinations during interpretation and digital subtraction angiograms (DSA), if available, to establish the best possible reference standard for the labels. Each case was labeled ...