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Article History

Received: 7 January 2026

Accepted: 16 March 2026

First Online: 10 April 2026

Declarations

Conflict of interest: Mariko Goto received speaker honoraria from Bayer Yakuhin Ltd., Guerbet Japan Co.,Ltd. and GE Healthcare Pharma K.K., as well as travel and lodging support from Bayer Yakuhin Ltd., and has served on an advisory board for Bayer Yakuhin Ltd.. Mariko Goto serves as a councilor and Guideline Committee Member of the Japanese Breast Cancer Society and as an editorial board member of the Japanese Journal of Radiology; these roles are unpaid. Koji Sakai serves as an associate professor of a joint research laboratory supported by Doctor-NET Inc. Kei Yamada received research funding from Guerbet Japan, Doctor-NET Inc., and Fukushima SiC Applied Engineering Inc., speaker honoraria from Bracco Japan and Japan Medical Association, and payment for expert testimony. Kei Yamada serves as president of the Japanese College of Radiology and as secretary general of the Asian-Oceania Society of Neuroradiology and Head & Neck Radiology; these roles are unpaid. Saeko Usui, Toshiyuki Okamoto, and Yuka Onishi have no conflicts of interest to declare.

Ethics approval: Approval was obtained from the institutional ethics committee of Kyoto Prefectural University of Medicine (No.: ERB-C-3260).

Informed consent: The requirement for informed consent was waived because of the retrospective study design.