Development of a Dedicated Prostate Phantom for Technical Evaluation of Diffusion-weighted MR Imaging Sequences
Abstract
This study aimed to demonstrate the technical feasibility of a dedicated prostate phantom for standardized qualitative evaluation of diffusion-weighted MRI sequences, focusing on signal-to-noise characteristics and image artifacts. A custom-designed phantom simulating prostate tissue, tumor lesions, and rectal gas was used to evaluate 6 diffusion-weighted imaging techniques at 1.5 and 3.0 tesla. Quantitative assessments included signal-to-noise measurements and susceptibility artifacts, while spatial distortion was evaluated by comparison with T2-weighted imaging. Qualitative image quality was assessed using corresponding clinical images as references. Clinical images were evaluated by a radiologist and a urologist, and phantom images were evaluated by 2 radiological technologists. The phantom demonstrated high inter-reader agreement for qualitative image assessment. Clinical image evaluation was performed to confirm whether artifact trends observed in the phantom were similarly observed in clinical images and showed comparable tendencies across sequences. These findings indicate that the proposed prostate phantom provides a practical and reproducible platform for qualitative evaluation.
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BibTeX
@article{ohashi2026development,
title = {{Development of a Dedicated Prostate Phantom for Technical Evaluation of Diffusion-weighted MR Imaging Sequences}},
author = {Kazunori Ohashi and Shigehiro Soh and Yoshiomi Sato and Ryoma Miura and Ayumu Funaki and Kaoru Watanabe and Toshiyuki Iwahata and Kazutaka Saito and Kazunori Kubota},
journal = {Magnetic Resonance in Medical Sciences},
year = {2026},
month = jul,
doi = {10.2463/mrms.tn.2026-0010},
url = {https://www.jstage.jst.go.jp/article/mrms/25/4/25_tn.2026-0010/_article},
note = {CC BY},
}
RIS
TY - JOUR
TI - Development of a Dedicated Prostate Phantom for Technical Evaluation of Diffusion-weighted MR Imaging Sequences
AU - Kazunori Ohashi
AU - Shigehiro Soh
AU - Yoshiomi Sato
AU - Ryoma Miura
AU - Ayumu Funaki
AU - Kaoru Watanabe
AU - Toshiyuki Iwahata
AU - Kazutaka Saito
AU - Kazunori Kubota
PY - 2026
DA - 2026/07/11
JO - Magnetic Resonance in Medical Sciences
DO - 10.2463/mrms.tn.2026-0010
UR - https://www.jstage.jst.go.jp/article/mrms/25/4/25_tn.2026-0010/_article
AB - This study aimed to demonstrate the technical feasibility of a dedicated prostate phantom for standardized qualitative evaluation of diffusion-weighted MRI sequences, focusing on signal-to-noise characteristics and image artifacts. A custom-designed phantom simulating prostate tissue, tumor lesions, and rectal gas was used to evaluate 6 diffusion-weighted imaging techniques at 1.5 and 3.0 tesla. Quantitative assessments included signal-to-noise measurements and susceptibility artifacts, while spatial distortion was evaluated by comparison with T2-weighted imaging. Qualitative image quality was assessed using corresponding clinical images as references. Clinical images were evaluated by a radiologist and a urologist, and phantom images were evaluated by 2 radiological technologists. The phantom demonstrated high inter-reader agreement for qualitative image assessment. Clinical image evaluation was performed to confirm whether artifact trends observed in the phantom were similarly observed in clinical images and showed comparable tendencies across sequences. These findings indicate that the proposed prostate phantom provides a practical and reproducible platform for qualitative evaluation.
SN - 1880-2206
SN - 1347-3182
ER -