Advanced
Technical
IVT
parallel imaging
MRI acceleration technique using multiple receiver coils to reduce scan time while maintaining image quality.
Full Definition
Parallel imaging is an MRI acceleration technique that exploits spatial sensitivity differences among multiple receiver coil elements to reconstruct images from undersampled k-space data. This approach significantly reduces acquisition time while preserving diagnostic image quality, though at the cost of reduced signal-to-noise ratio. Common parallel imaging methods include SENSE and GRAPPA, with acceleration factors typically ranging from 2 to 4 in clinical neuroimaging applications.
Usage
Usage note: Distinguish from simultaneous multislice, which accelerates by exciting multiple slices simultaneously.
In Context
- "Parallel imaging with GRAPPA factor 2 reduced scan time to 4 minutes." — Protocol documentation
- "The SNR penalty from parallel imaging was acceptable for clinical diagnosis." — Technical evaluation
Also known as
parallel acquisition
coil acceleration
Don't confuse with
simultaneous multislice
compressed sensing