284. Protocol of verification of dose indicators of radiological equipment for the correct archiving and recording of dosimetric data

• Published in: Physica medica 2018-12, Vol.56, p.235-235
• Main Authors: Scrittori, N., Farnedi, S.
• Format: Article
• Language: English
• ISSN: 1120-1797; 1724-191X
• DOI: 10.1016/j.ejmp.2018.04.293

Dose report in radiological examination will be an issue soon with the Euratom directive 2013/59 [1]. Our purpose is to analyze our results on approximately 10 years of dose control activity in our Hospital as required by the current regulations D.Lvo 187/00. The aim of the work is to analyze the measurement methods implemented on the installed radiological equipment DAP, KAP, CTDI, ESD, and compare them with our reference measurement. During the acceptance tests and the annual constancy tests of all radiological equipment installed since 2007, we have set up a verification protocol of dose indicator through direct measurements with calibrated instruments [2]. For DAP/KAP direct digital X-ray equipment, angiography systems radiography e fluoroscopy systems our adopted protocol controls the following parameters: accuracy, reproducibility, dependence on the field, dependence on the quality of the beam with an external calibrated DAP meter: Dose guard 100 (RTI electron ics). For CTDI vol values provided from CT scanners: Pencil ionization camera (Victoreen Instruments) and PMMA phantoms. For mammography (ESD and AGD displayed dose): measurements with calibrated dosimeter and phantoms in mammography. The results of about 800 measurements are illustrated carried out on: DAP, CTDI vol, ESE, DAP, CTDI vol, ESE. [Display omitted] Calibrations were requested on dose display devices in direct digital equipment (DAP) in 4% of equipments with a discrepancy of more than 20%, [Fig. 1] due to the loss of calibration due to the drop in tube efficiency. For the remaining equipment the discrepancies detected are within the limits. The verification protocol is reliable and compliant with the guidelines, useful in the preliminary phase to the registration of the dosimetric data protocol [3].