Cross correlation-based misregistration correction for super resolution T₂ -weighted spin-echo images: application to prostate.

ABSTRACT:

Purpose

The purpose is to develop a retrospective correction for subtle slice-to-slice positional inconsistencies that can occur when overlapped slices are acquired for super resolution in T₂ -weighted spin-echo multislice imaging.

Methods

Spin-echo acquisition of overlapped slices is typically done using multiple passes. After the passes are assembled into the final slice set, consecutive slices are correlated due to their overlap. Cross correlation was used to measure slice-to-slice displacement. After Z-dependent filtering to preserve true object shape, the displacements were used to correct slice position. The method was tested in a phantom moved slowly (0.16-0.63 mm/pass) under computer control and in vivo in 16 patients having prostate MRI.

Results

Ov

SUBMITTER: Borisch EA 

PROVIDER: S-EPMC7718320 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature