Erratum to: Jpn J Radiol DOI 10.1007/s11604-016-0539-1

The original version of the article cited above unfortunately contained an error. The “Ethical statement” section should read as follows:

Ethical statement This study was conducted according to the Ethical Guidelines for Clinical Research by the Japanese Ministry of Health, Labor and Welfare. This study was approved by the Japan Health, Labor, and Welfare Organization and the ethical review boards of the principal investigator’s institution (Okayama Rosai Hospital). Patient confidentiality was strictly maintained. Informed consent was obtained from the closest living relatives of each patient.