腎沒問題MRI with contrast副作用不大.
https://www.mhlw.go.jp/seisakunitsuite/bunya/kenkou_iryou/iryou/kokusai/setsumeisiryo/dl/cn43.pdf
https://my.clevelandclinic.org/health/diagnostics/22966-brain-mri#:~:text=What%20is%20a%20brain%20MRI%20with%20contrast%3F,the%20quality%20of%20the%20images.