title: Miniature radiation dosimeter for in vivo radiation measurements.
abstract: We have made initial characterization measurements on a miniature radiation dosimeter which can be used for in vivo radiation measurements. It consists of a radiation sensing field effect transistor (RADFET) mounted in a 0.8 mm OD plastic catheter. The RADFET acts as a dosimeter by storing trapped charge proportional to absorbed dose. The stored charge signal can be differentiated to give dose rate. We report on the techniques for mounting, a circuit for dose readout, drift of the readings, linearity of response, temperature and angular dependence, and unpowered operation of the device.
authors: Sandia National Laboratories, Albuquerque, NM 87185.
authors: R C
authors: RC
authors: Hughes
authors: D
authors: D
authors: Huffman
authors: J V
authors: JV
authors: Snelling
authors: T E
authors: TE
authors: Zipperian
authors: A J
authors: AJ
authors: Ricco
authors: C A
authors: CA
authors: Kelsey
mesh_terms: D011874:Radiometry / Q000295:instrumentation*; D011879:Radiotherapy Dosage