Volume 88, Issue 6 pp. 2609-2620
RAPID COMMUNICATION

Improving multiparametric MR-transrectal ultrasound guided fusion prostate biopsies with hyperpolarized 13C pyruvate metabolic imaging: A technical development study

Hsin-Yu Chen

Hsin-Yu Chen

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Robert A. Bok

Robert A. Bok

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Matthew R. Cooperberg

Matthew R. Cooperberg

Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Hao G. Nguyen

Hao G. Nguyen

Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Katsuto Shinohara

Katsuto Shinohara

Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Antonio C. Westphalen

Antonio C. Westphalen

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Zhen J. Wang

Zhen J. Wang

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Michael A. Ohliger

Michael A. Ohliger

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Daniel Gebrezgiabhier

Daniel Gebrezgiabhier

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Lucas Carvajal

Lucas Carvajal

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Jeremy W. Gordon

Jeremy W. Gordon

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Peder E. Z. Larson

Peder E. Z. Larson

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Rahul Aggarwal

Rahul Aggarwal

Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
John Kurhanewicz

John Kurhanewicz

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Search for more papers by this author
Daniel B. Vigneron

Corresponding Author

Daniel B. Vigneron

Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, United States

Correspondence

Daniel B. Vigneron, Department of Radiology and Biomedical Imaging, University of California, San Francisco, 1700 Fourth Street, Byers Hall Suite 102, San Francisco, CA 94158.

Email: [email protected]

Search for more papers by this author
First published: 17 August 2022
Citations: 2

Correction added after online publication 1 September 2022. Due to a production error, Figures 4, 5, and 6 appeared out of order and are correct in this version.

This work was supported by the National Institutes of Health (NIH) grants U01CA232320, U01EB026412, R01CA238379, and P41EB013598; and the American Cancer Society (ACS) grant 131715-RSG-18-005-01-CCE.

Funding information: Daniel B. Vigneron, Grant/Award Numbers: P41EB013598; R01CA238379; U01CA232320; U01EB026412; Zhen J. Wang, Grant/Award Number: 131715-RSG-18-005-01-CCE

Click here for author-reader discussions

Abstract

Purpose

To develop techniques and establish a workflow using hyperpolarized carbon-13 (13C) MRI and the pyruvate-to-lactate conversion rate (kPL) biomarker to guide MR-transrectal ultrasound fusion prostate biopsies.

Methods

The integrated multiparametric MRI (mpMRI) exam consisted of a 1-min hyperpolarized 13C-pyruvate EPI acquisition added to a conventional prostate mpMRI exam. Maps of kPL values were calculated, uploaded to a picture archiving and communication system and targeting platform, and displayed as color overlays on T2-weighted anatomic images. Abdominal radiologists identified 13C research biopsy targets based on the general recommendation of focal lesions with kPL >0.02(s−1), and created a targeting report for each study. Urologists conducted transrectal ultrasound-guided MR fusion biopsies, including the standard 1H–mpMRI targets as well as 12–14 core systematic biopsies informed by the research 13C-kPL targets. All biopsy results were included in the final pathology report and calculated toward clinical risk.

Results

This study demonstrated the safety and technical feasibility of integrating hyperpolarized 13C metabolic targeting into routine 1H–mpMRI and transrectal ultrasound fusion biopsy workflows, evaluated via 5 men (median age 71 years, prostate-specific antigen 8.4 ng/mL, Cancer of the Prostate Risk Assessment score 2) on active surveillance undergoing integrated scan and subsequent biopsies. No adverse event was reported. Median turnaround time was less than 3 days from scan to 13C-kPL targeting, and scan-to-biopsy time was 2 weeks. Median number of 13C targets was 1 (range: 1–2) per patient, measuring 1.0 cm (range: 0.6–1.9) in diameter, with a median kPL of 0.0319 s−1 (range: 0.0198–0.0410).

Conclusions

This proof-of-concept work demonstrated the safety and feasibility of integrating hyperpolarized 13C MR biomarkers to the standard mpMRI workflow to guide MR-transrectal ultrasound fusion biopsies.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.