Synergistic Motion Compensation Strategies for Positron Emission Tomography when Acquired Simultaneously with Magnetic Resonance Imaging

Overview

Journal Philos Trans A Math Phys Eng Sci

Specialties Biomedical Engineering
Biophysics
Public Health

Date 2021 Jul 5

PMID 34218675

Citations 8

Authors

Irene Polycarpou

Georgios Soultanidis

Charalampos Tsoumpas

Affiliations

Soon will be listed here.

Abstract

Subject motion in positron emission tomography (PET) is a key factor that degrades image resolution and quality, limiting its potential capabilities. Correcting for it is complicated due to the lack of sufficient measured PET data from each position. This poses a significant barrier in calculating the amount of motion occurring during a scan. Motion correction can be implemented at different stages of data processing either during or after image reconstruction, and once applied accurately can substantially improve image quality and information accuracy. With the development of integrated PET-MRI (magnetic resonance imaging) scanners, internal organ motion can be measured concurrently with both PET and MRI. In this review paper, we explore the synergistic use of PET and MRI data to correct for any motion that affects the PET images. Different types of motion that can occur during PET-MRI acquisitions are presented and the associated motion detection, estimation and correction methods are reviewed. Finally, some highlights from recent literature in selected human and animal imaging applications are presented and the importance of motion correction for accurate kinetic modelling in dynamic PET-MRI is emphasized. This article is part of the theme issue 'Synergistic tomographic image reconstruction: part 2'.

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