From the ∗Department of Radiology, Kindai University Faculty of Medicine

†Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Kindai University Hospital

‡Department of Neurosurgery, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan.

Received for publication February 7, 2022; revision accepted May 1, 2022.

Conflicts of interest and sources of funding: none declared.

Correspondence to: Hayato Kaida, MD, Department of Radiology, Kindai University Faculty of Medicine, Ohnohigashi 377-2, Osakasayama City, Osaka 589-8511, Japan. E-mail: [email protected].