64 slice dual source spiral ct

The images on the PACS screen were evaluated by a neurologist and radiologist who were blind to the clinical characteristics and prognosis of these patients and received standardized training. The same template was used for determination of location, and degree of calcification, white matter hypersensitivity, status lacunaris, and microbleed were evaluated. Cerebral magnetic resonance angiography was performed with the following parameters: TR, 22 ms; TE, 3.6 ms; flip angle: 20o; slice thickness, 1.5 mm; slice interval, 1.8 mm; FOV, 640 × 580. Computed tomography angiography was performed with a 64-slice dual-source spiral CT (Siemens, Germany). Gadolinium solution was injected at 4.5 mL/s. The slice thickness was 1 mm; the FOV was 512 × 512.

All the patients underwent MRI scanning with a 3.0T MR scanner (Siemens, Germany), and images were obtained after axial scanning.
Cranial CT was performed with a 64-slice dual-source spiral CT (Siemens, Germany) (slice thickness 5 or 10 mm; FOV: 512 × 512).
Cranial MRI was performed with the following parameters: slice thickness: 5 mm; slice interval: 6.5 mm; T1WI sequence: TR, 1800 ms; TE, 8.8 ms, FOV, 640 × 576; T2WI sequence: TR, 4500 ms; TE, 106 ms; FOV, 640 × 576; FLAIR sequence: TR, 7000 ms; TE, 89 ms; FOV, 512 × 464; DWI sequence: TR, 4000 ms; TE: 100 ms; FOV, 288 × 324.
Susceptibility-weighted magnetic resonance imaging was performed with high-resolution, three-dimensional gradient-echo (3D-GE) sequence as follows: magnitude image (Mag): TR, 28.0 ms; TE, 20.0 ms; slice thickness, 1.5 mm; FOV, 640 × 520; phase image (Pha): TR, 28.0 ms; TE, 20.0 ms; slice thickness, 1.5 mm; FOV, 640 × 520; minimum intensity projection (mIP): TR, 28.0 ms; TE, 20.0 ms; slice thickness, 12.0 mm; FOV, 640 × 520; SWI image: TR, 28.0 ms; TE, 20.0 ms; slice thickness, 1.5 mm; FOV, 640 × 520.