Journal article
A Movable Phantom Design for Quantitative Evaluation of Motion Correction Studies on High Resolution PET Scanners
Image Analysis and Computer Graphics, Department of Informatics and Mathematical Modeling, Technical University of Denmark1
Department of Informatics and Mathematical Modeling, Technical University of Denmark2
Department of Electrical Engineering, Technical University of Denmark3
Biomedical Engineering, Department of Electrical Engineering, Technical University of Denmark4
Center for Fast Ultrasound Imaging, Centers, Technical University of Denmark5
Head movements during brain imaging using high resolution positron emission tomography (PET) impair the image quality which, along with the improvement of the spatial resolution of PET scanners, in general, raises the importance of motion correction. Here, we present a new design for an automatic, movable, mechanical PET phantom to simulate patients' head movements while being scanned.
This can be used for evaluating motion correction methods. A low-cost phantom controlled by a rotary stage motor was built and tested for axial rotations of 1 degrees - 10 degrees with the multiple acquisition frame method. The phantom is able to perform stepwise and continuous axial rotations with submillimeter accuracy, and the movements are repeatable.
The scans were acquired on the high resolution research tomograph dedicated brain scanner. The scans were reconstructed with the new 3-D ordered subset expectation maximization algorithm with modeling of the point spread function (3DOSEM-PSF), and they were corrected for motions based on external tracking information using the Polaris Vicra real-time stereo motion-tracking system.
The new automatic, movable phantom has a robust design and is a potential quality assessment tool for the development and evaluation of future motion correction methods.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2010 |
| Pages: | 1116-1124 |
| ISSN: | 15581578 and 00189499 |
| Types: | Journal article |
| DOI: | 10.1109/TNS.2010.2043369 |
| ORCIDs: | Olesen, Oline Vinter and Jensen, Jørgen Arendt |
High Resolution Research Tomograph (HRRT) motion compensation phantom positron emission tomography (PET)
3D ordered subset expectation maximization algorithm Automatic control Brain modeling Head High-resolution imaging Image quality Image resolution Imaging phantoms Polaris Vicra real-time stereo motion-tracking system Positron emission tomography Spatial resolution Testing brain brain imaging brain scanner continuous axial rotations external tracking information head movements high-resolution PET scanners image motion analysis image reconstruction low-cost phantom medical image processing motion correction studies movable phantom design optimisation phantoms point spread function positron emission tomography rotary stage motor spatial resolution
