Conclusions: Many patients with headache have normal brain CT scan results. Thus, better criteria are warranted for requesting neuroimaging including accurate patient history and neurological examination in order to prevent unnecessary radiation exposure. MRI instead of CT scan would be a better first ...
结果:mri定位准确率为100%,5例神经源性肿瘤,呈长t1长t2信号,具有异常对比增强;3例脊膜瘤,呈等长t1等长t2信号,具有十分明显异常对比增强,由于脊膜瘤可有钙化,mri信号强度可以不均匀;2例蛛网膜囊肿,与脑脊液信号相一致,不具有异常对比增强;1例脂肪瘤,呈圆形短t1稍长t2信号,不具有异常对比增强;1例血肿,呈短t1...
The fuzzy information models of tumor area in human brain and the particular fuzzy relations that contribute to information fusion and classification are also established. Three MR image sequences of a patient are utilized as an example to show the method performances. The results are appreciated ...
Besides, the retrieval results should not be affected by the actual presence of abnormal lesions in images because the abnormal features are separated from the normal anatomy codes even if there exists gross tumor. 3.2.2. Similarity based on abnormal features When viewed by focusing only on ...
13.A brain imaging study (CT or MRI) was significantly abnormal in 10% of patients, indicating a possible seizure etiology.一项脑部影像学研究显示10%的患者存在异常,可能是其病因。 14.Cooper test showed that no rotational instability at 90° except 1 cases at 30° with less than 5°.外旋试验...
13.A brain imaging study (CT or MRI) was significantly abnormal in 10% of patients, indicating a possible seizure etiology.一项脑部影像学研究显示10%的患者存在异常,可能是其病因。 14.Cooper test showed that no rotational instability at 90° except 1 cases at 30° with less than 5°.外旋试验...
- 《Brain》 被引量: 350发表: 1997年 Mapping cerebrovascular reactivity using blood oxygen level-dependent MRI in Patients with arterial steno-occlusive disease: comparison with arterial spin ... BACKGROUND AND PURPOSE: Blood oxygen level-dependent MRI (BOLD MRI) of hypercapnia-induced changes in ...
that anesthesia induced or uncovered cardiac conductance defects, which in some cases included escaped QRSs and progressed to complete AV blocks and bradycardic death. These results, together with the gravimetric, hemodynamic and MRI findings, unequivocally demonstrate impaired heart function in dKO mice...
Experimental results and performance of the methods confirm the efficacy of the proposed technique in an automatic segmentation of abnormal tissues in multimodal (T 1 , T 2 , Flair, and T 1contrast ) brain MRIs.Reza, Syed M. S.Old Dominion UniversityIslam, Atiq...
This chapter discusses multi-fractal texture estimation and characterization of brain lesions (necrosis, edema, enhanced tumor, non-enhanced tumor, etc.) in magnetic resonance (MR) images. This work formulates the complex texture of tumor in MR images using a stochastic model known as multi-...