Parallel imaging (mri)

1. What is parallel imaging used for in MRI?
2. What are the two types of parallel imaging?
3. What is parallel imaging factor?
4. Which type of coil is required for parallel imaging MRI?

What is parallel imaging used for in MRI?

Parallel imaging is a robust method for accelerating the acquisition of magnetic resonance imaging (MRI) data, and has made possible many new applications of MR imaging. Parallel imaging works by acquiring a reduced amount of k-space data with an array of receiver coils.

What are the two types of parallel imaging?

Parallel imaging techniques generally fall into two categories: 1) those were reconstruction takes place in the image domain requiring an unfolding or inversion procedure; and 2) those that take place in k-space, where calculation of missing harmonic data is performed prior to reconstruction.

What is parallel imaging factor?

Parallel imaging is a widely used technique where the known placement and sensitivities of receiver coils are used to assist spatial localization of the MR signal. Having this additional information about the coils allows reduction in number of phase-encoding steps during image acquisition.

Which type of coil is required for parallel imaging MRI?

Parallel imaging represents a way to speed up acqusition time by undersampling the phase-encoding direction by an acceleration factor R. It requires the use of phased-array receiver coils to localize signal based on proximity to each coil in order to unwrap the aliasing caused by the undersampling.