| http://www.w3.org/ns/prov#value | - Nationwide survey on the operational status of medical compact cyclotrons in JapanToshioh FujibuchiDepartment of Radiological Sciences, School of Health Sciences, Ibaraki Prefectural University, Inashiki Gun, Ibaraki, JapanRadiol Phys Technol 2:126-32. 2009..radioactivity of the cyclotron itself and structures is an important issue
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