Sense receive head coil

Whole brain MRI data were acquired on a Philips 3.0T Intera scanner using a SENSE receive head coil. The MRI protocol included conventional and non-conventional MRI sequences [dual echo turbo spin echo, fluid attenuation by inversion recovery (FLAIR) and 3D T1-weighted magnetization prepared rapid acquisition with gradient echo (MPRAGE)]. The T1-weighted sequence spatial resolution was 1 mm × 1 mm × 1 mm and field-of-view was 256 mm × 256 mm. Diffusion-weighted image (DWI) data were acquired axially from the same graphically prescribed conventional MRI volumes using a single-shot multi-slice 2-D spin-echo diffusion sensitized and fat-suppressed echo planar imaging (EPI) sequence, with the balanced Icosa21 tensor encoding scheme (28 (link), 29 (link)). The b-factor = 1,000 s mm⁻², TR/TE = 7,100/65 ms, FOV = 256 mm × 256 mm, and slice thickness/gap/#slices = 3 mm/0 mm/44. The EPI phase encoding used a SENSE k-space undersampling factor of two, with an effective k-space matrix of 128 × 128, and an image matrix after zero-filling of 256 × 256. The constructed image spatial resolution for the DWI data was = 1 mm × 1 mm × 3 mm.

Data were acquired on a Philips 3.0 T Achieva scanner using a SENSE receive head coil. The MRI protocol included conventional MRI (dual echo turbo spin echo, phase-sensitive, Fluid attenuation by inversion recovery (FLAIR) and 3D T1-weighted magnetization prepared rapid acquisition of gradient echo (MPRAGE)). The T1-weighted sequence spatial resolution was 1 mm × 1 mm × 1 mm and field-of-view was 256 mm × 256 mm. Diffusion-weighted image (DWI) data were acquired axially from the same graphically prescribed conventional MRI volumes using a single-shot multi-slice 2-D spin-echo diffusion sensitized and fat-suppressed echo planar imaging (EPI) sequence, with the balanced and alternating polarity Icosa21 tensor encoding scheme (Hasan and Narayana, 2003 (link); Hasan, 2007 (link)). The b-factor = 1000 s mm⁻², T_R/T_E = 9000/65 ms, FOV = 256 mm × 256 mm and slice thickness/gap/#slices = 2 mm/0 mm/70. The EPI phase encoding used a SENSE k-space undersampling factor of two, with an effective k-space matrix of 128 × 128, and an image matrix after zero-filling of 256 × 256. The constructed image spatial resolution for the DWI data was = 1 mm × 1 mm × 2 mm. Note that the acquisition voxel volume is indeed isotropic 2 mm and this resolution is the product of upsampling.