B0 images obtained from diffusion-weighted echo planar sequences for the detection of intracerebral bleeds
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摘要Background and Purpose. To evaluate the accuracy of 130 echo planar imaging (EPI) sequences for the detection of intracerebral bleeds. Methods. One hundred patients with acute strokes had magnetic resonance imaging and computed tomography (CT) examinations performed within 48 hours after the onset of symptoms. The detectability of intracerebral bleeds by the B0 EPI sequences was assessed. The results were compared to the gradient echo (GRE) sequence and CT brain examinations. The results of the GRE sequences were used as the gold standard. Results. The 130 EPI sequences detected 11 out of 11 acute, intracerebral hematomas; 6 out of 8 acute hemorrhagic strokes; 2 out of 2 acute, intraventricular hemorrhages; 8 out of 8 old hemorrhagic infarcts; 1 out of 1 subarachnoid hemorrhages; and 11 out of 22 patients with microbleeds. For the detection of acute, intracerebral hematomas and acute, hemorrhagic infarcts, 130 EPI sequences had a sensitivity of 89.5%, a specificity of 100%, and an accuracy of 98%. CT had a sensitivity of 57.9%, a specificity of 100%, and an accuracy of 92%. B0 EPI sequences did not miss any acute or chronic hemorrhages detected by CT examinations. Conclusions. B0 EPI sequences could not replace GRE images for the detection of both acute and chronic hemorrhages. Their sensitivity for the detection of acute and chronic blood products, however, was comparable, if not superior, to that of CT examinations.
著者Lam WWM, So NMC, Wong KS, Rainer T
期刊名稱Journal of Neuroimaging
出版年份2003
月份4
日期1
卷號13
期次2
出版社SAGE PUBLICATIONS INC
頁次99 - 105
國際標準期刊號1051-2284
電子國際標準期刊號1552-6569
語言英式英語
關鍵詞diffusion; hemorrhage; magnetic resonance; perfusion
Web of Science 學科類別Clinical Neurology; CLINICAL NEUROLOGY; Neuroimaging; NEUROIMAGING; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging; RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

上次更新時間 2020-29-09 於 01:08