Conflict of interest

MK received honoraria from Hitachi Ltd. and AstraZeneca outside the scope of this work; TM received honoraria from AstraZeneca and Brain Lab Inc. outside the scope of this work; other authors declare that they have no conflict of interest.

Ethical approval

This study was conducted in accordance with the ethical standards of the 1964 Declaration of Helsinki and its later amendments. The requirement for ethical approval was waived by the Institutional Review Board of the Kobe City Medical Center General Hospital as this study was limited to a single retrospective case report and no identifiable patient data were disclosed.

Informed consent

Written informed consent for the publication of this case report and any accompanying images was obtained from the patient.