title: Validation of a MOSFET dosemeter system for determining the absorbed and effective radiation doses in diagnostic radiology.
abstract: This study aimed to validate a MOSFET dosemeter system for determining absorbed and effective doses (EDs) in the dose and energy range used in diagnostic radiology. Energy dependence, dose linearity and repeatability of the dosemeter were examined. The absorbed doses (ADs) were compared at anterior-posterior projection and the EDs were determined at posterior-anterior, anterior-posterior and lateral projections of thoracic imaging using an anthropomorphic phantom. The radiation exposures were made using digital radiography systems. This study revealed that the MOSFET system with high sensitivity bias supply set-up is sufficiently accurate for AD and ED determination. The dosemeter is recommended to be calibrated for energies <60 and >80 kVp. The entrance skin dose level should be at least 5 mGy to minimise the deviation of the individual dosemeter dose. For ED determination, dosemeters should be implanted perpendicular to the surface of the phantom to prevent the angular dependence error.
authors.affiliation: Department of Diagnostic Radiology, Oulu University Hospital, PO Box 50, Oulu FI-90029, Finland Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland anna-leena.manninen@ppshp.fi.
authors.forename: A-L
authors.initials: AL
authors.lastname: Manninen
authors.affiliation: Department of Diagnostic Radiology, Oulu University Hospital, PO Box 50, Oulu FI-90029, Finland Department of Physical Sciences, Biophysics, University of Oulu, PO Box 3000, Oulu FI-90014, Finland Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.
authors.forename: A
authors.initials: A
authors.lastname: Kotiaho
authors.affiliation: Department of Diagnostic Radiology, Oulu University Hospital, PO Box 50, Oulu FI-90029, Finland Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland Department of Oncology and Radiotherapy, Oulu University Hospital, PO Box 22, Oulu FI-90029, Finland.
authors.forename: J
authors.initials: J
authors.lastname: Nikkinen
authors.affiliation: Department of Diagnostic Radiology, Oulu University Hospital, PO Box 50, Oulu FI-90029, Finland Department of Radiology, University of Oulu, PO Box 5000, Oulu FI-90014, Finland Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.
authors.forename: M T
authors.initials: MT
authors.lastname: Nieminen
mesh_terms: D002138:Calibration; D006801:Humans; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011482:Protective Devices; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation*; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011871:Radiology / Q000295:instrumentation*; D012867:Skin / Q000528:radiation effects*