Evaluation of the distribution of activation inside a compact medical cyclotron.
The distribution of activation inside a compact medical cyclotron was evaluated by measuring 1cm dose equivalent rates and γ-ray spectra. Analysis of the distribution of activation showed high activation at the deflector and the magnetic channel. Radionuclides60Co,57Co,65Zn, and54Mn were detected. Different radionuclides were generated from different components of the cyclotron, and low-activity radionuclides could be detected under low-background-radiation conditions.
Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Japan. Electronic address: fujibuch@hs.med.kyushu-u.ac.jp.
Toshioh
T
Fujibuchi
Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan.
Takatoshi
T
Toyoda
Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan.
Shingo
S
Baba
Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan.
Yoshiyuki
Y
Umezu
Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan.
Isao
I
Komiya
Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Japan.
Masayuki
M
Sasaki
Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan.
Hiroshi
H
Honda
Activation; Compact medical cyclotron; Neutron; Radioactive concentration