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Published in: International Journal of Computer Assisted Radiology and Surgery 4/2024

08-02-2024 | Original Article

Detection support of lesions in patients with prostate cancer using \({}_{{}}^{18} {\text{F}}\)-PSMA 1007 PET/CT

Authors: Naoki Tsuchiya, Koichiro Kimura, Ukihide Tateishi, Tadashi Watabe, Koji Hatano, Motohide Uemura, Norio Nonomura, Akinobu Shimizu

Published in: International Journal of Computer Assisted Radiology and Surgery | Issue 4/2024

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Abstract

Purpose

This study proposes a detection support system for primary and metastatic lesions of prostate cancer using \({}_{{}}^{18} {\text{F}}\)-PSMA 1007 positron emission tomography/computed tomography (PET/CT) images with non-image information, including patient metadata and location information of an input slice image.

Methods

A convolutional neural network with condition generators and feature-wise linear modulation (FiLM) layers was employed to allow input of not only PET/CT images but also non-image information, namely, Gleason score, flag of pre- or post-prostatectomy, and normalized z-coordinate of an input slice. We explored the insertion position of the FiLM layers to optimize the conditioning of the network using non-image information.

Results

\({}_{{}}^{18} {\text{F}}\)-PSMA 1007 PET/CT images were collected from 163 patients with prostate cancer and applied to the proposed system in a threefold cross-validation manner to evaluate the performance. The proposed system achieved a Dice score of 0.5732 (per case) and sensitivity of 0.8200 (per lesion), which are 3.87 and 4.16 points higher than the network without non-image information.

Conclusion

This study demonstrated the effectiveness of the use of non-image information, including metadata of the patient and location information of the input slice image, in the detection of prostate cancer from \({}_{{}}^{18} {\text{F}}\)-PSMA 1007 PET/CT images. Improvement in the sensitivity of inactive and small lesions remains a future challenge.

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Metadata
Title
Detection support of lesions in patients with prostate cancer using -PSMA 1007 PET/CT
Authors
Naoki Tsuchiya
Koichiro Kimura
Ukihide Tateishi
Tadashi Watabe
Koji Hatano
Motohide Uemura
Norio Nonomura
Akinobu Shimizu
Publication date
08-02-2024
Publisher
Springer International Publishing
Published in
International Journal of Computer Assisted Radiology and Surgery / Issue 4/2024
Print ISSN: 1861-6410
Electronic ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-024-03067-5

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