Dosimetry protocol for absorbed dose to water using medical linear accelerator was published as JSMP guideline: a code of practice for dosimetry using a radiotherapy ionization chamber calibrated in a clinical linac (JSMP Linac Standard Dosimetry 24) in 2024. Formalism and implementation were simplified, and uncertainty of dose delivery was significantly reduced compared to currently prevailed dosimetry protocol of Standard Dosimetry 12 whose reference quality is ⁶⁰Co gamma radiation. In this report outline and practice of JSMP Linac Standard Dosimetry 24 including comparison with Standard Dosimetry 12 was discussed.

The Japan Society of Medical Physics (JSMP) held a joint symposium with the Korean Association of Medical Physicists in North America (KAMPiNA) and the Korean Society of Medical Physics (KSMP) on July 26, 2025, at the venue of the American Association of Physicists in Medicine (AAPM) Annual Meeting in Washington, DC. This symposium originated from a joint symposium held with the AAPM by the organizing committee during the 2021 Korea-Japan joint meeting on Medical Physics (KJMP), which was held online because of the COVID-19 pandemic. Building on this collaboration, the JSMP International Affairs Committee consulted with KSMP and, with the cooperation of the AAPM International Affairs Committee, held the first symposium in a hybrid online and in-person style at the 2022 AAPM Annual Meeting. Since then, it has been held at the annual meeting, with 2025 marking its fourth iteration. This paper presents a record of these events.

This is a review on history of medical physics in Radiological Physics and Technology published by JSRT and JSMP (https://www.jsmp.org/en/).

This is a review on history of medical physics in Radiological Physics and Technology published by JSRT and JSMP (https://www.jsmp.org/en/).

This is a review on history of medical physics in Radiological Physics and Technology published by JSRT and JSMP (https://www.jsmp.org/en/).