Purpose: A personal wireless dosimeter prototype, to be weared by medical staff during Interventional Radiology procedures, has been characterized. Materials and methods: The prototype is composed by a sensing element (a CMOS silicon pixel device), a real-time data reduction system (a CPLD), a control system, a wireless transmission module, a remote station for prototype configuration, control and data storage. The prototype has been irradiated in laboratory using monochromatic X-ray photons to calibrate the sensing element, then using the angiography system with a PMMA phantom, to diffuse the direct radiation, in all the working conditions (continuous/pulsed, fluoroscopy/fluorography, different systems) and with different sensor settings. The prototype has also been exposed to certified X-ray beams to obtain a relative calibration. Finally the prototype has also been used during medical procedures, mounted over the protective vest weared by the medical staff. All the results have been compared with two dosimetric control systems, a set of TLDs and an UNFORS EDD-30 system.
Characterization of wireless personal dosimeter prototype for Interventional Radiology medical operators
BIASINI, Maurizio;BISSI, LUCIA;CONTI, ELIA;FORINI, Nevio;PASSERI, Daniele;PLACIDI, Pisana;SCORZONI, Andrea
2014
Abstract
Purpose: A personal wireless dosimeter prototype, to be weared by medical staff during Interventional Radiology procedures, has been characterized. Materials and methods: The prototype is composed by a sensing element (a CMOS silicon pixel device), a real-time data reduction system (a CPLD), a control system, a wireless transmission module, a remote station for prototype configuration, control and data storage. The prototype has been irradiated in laboratory using monochromatic X-ray photons to calibrate the sensing element, then using the angiography system with a PMMA phantom, to diffuse the direct radiation, in all the working conditions (continuous/pulsed, fluoroscopy/fluorography, different systems) and with different sensor settings. The prototype has also been exposed to certified X-ray beams to obtain a relative calibration. Finally the prototype has also been used during medical procedures, mounted over the protective vest weared by the medical staff. All the results have been compared with two dosimetric control systems, a set of TLDs and an UNFORS EDD-30 system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
