A method for mapping and quantifying whole organ diffusion-weighted image distortion in MR imaging of the prostate.
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Publication Date
2017-10-05Journal Title
Sci Rep
ISSN
2045-2322
Publisher
Springer Science and Business Media LLC
Volume
7
Issue
1
Pages
12727
Language
eng
Type
Article
This Version
VoR
Physical Medium
Electronic
Metadata
Show full item recordCitation
Gill, A., Czarniecki, M., Gallagher, F., & Barrett, T. (2017). A method for mapping and quantifying whole organ diffusion-weighted image distortion in MR imaging of the prostate.. Sci Rep, 7 (1), 12727. https://doi.org/10.1038/s41598-017-13097-6
Abstract
A computational algorithm was designed to produce a measure of DW image distortion across the prostate. This algorithm was tested and validated on virtual phantoms incorporating known degrees and distributions of distortion. A study was then carried out on DW image volumes from three sets of 10 patients who had been imaged previously. These volumes had been radiologically assessed to have, respectively, 'no distortion' or 'significant distortion' or the potential for 'significant distortion' due to susceptibility effects from hip prostheses. Prostate outlines were drawn on a T2-weighted (T2W) image 'gold-standard' volume and on an ADC image volume derived from DW images acquired over the same region. The algorithm was then applied to these outlines to quantify and map image distortion. The proposed method correctly reproduced known distortion values and distributions in virtual phantoms. It also successfully distinguished between the three groups of patients: mean distortion in 'non-distorted' image volumes, 1.942 ± 0.582 mm; 'distorted', 4.402 ± 1.098 mm; and 'hip patients' 8.083 ± 4.653 mm; P < 0.001. This work has demonstrated and validated a means of quantifying and mapping image distortion in clinical prostate MRI cases.
Keywords
Prostate, Humans, Prostatic Neoplasms, Radiographic Image Interpretation, Computer-Assisted, Diffusion Magnetic Resonance Imaging, Artifacts, Phantoms, Imaging, Algorithms, Male
Sponsorship
Cancer Research Uk (None)
Prostate Cancer UK (PA14-012)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1038/s41598-017-13097-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/274844
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