|
|
Monitoring the personnel radiation load in percutaneous interventions
SKÁCELOVÁ, Lada
The discovery of ionising radiation at the turn of the nineteenth and twentieth centuries was a landmark for medicine: the methods based on the principle and effects of ionising radiation are used even in the present medicine to a considerable extent. As early as in the very beginnings, adverse affects of ionising radiation were observed, and from this early period the first references to the need of radiation protection date. The fields of medicine dealing with the application of ionising radiation, whether in the diagnosis or in the therapy of diseases, went through an extensive development in their over hundred-year history. It was in the technical sphere in particular where the most important progress was accomplished, thanks to the ever more advanced instrumentation put on the market, meeting the strict criteria of radiation protection. On the one hand, a large group of diagnostic and therapeutic procedures was replaced by new methods (based on ultrasound and magnetic resonance) that are not based on ionising radiation, and thus the patient or the attending personnel are not exposed to the harmful effects of the radiation. On the other hand, the interventional radiology has attained an unprecedented expansion. With the development of new interventional methods and procedures, the number and duration of interventions has been growing. The radiation load to which the intervening personnel are exposed has thus been rising despite the state-of-the-art instrumentation. The theoretical part of the dissertation describes the origin and types of the ionising radiation, its properties and interactions with the environment; a proportional part has been devoted to the biological effects of the radiation. The prime attention has been concentrated on radiation protection, its objectives, principles and methods of radiation protection. An overview of the current legislation and list of requirements on the radiation monitoring has been elaborated. In the chapter on personal dosimetry, the fundamental relations and quantities used in the radiation dosimetry have been described, as well as the types of personal dosimeters and protective equipment. In the practical part, the radiation load of the personnel attending percutaneous interventions in the department of interventional radiology of the Clinic of Radiology of the Teaching Hospital Olomouc was measured. Personal electronic radiation dosimeters Rados, type RAD 60S, were used. All the data obtained were processed using statistical methods, and, on the basis of the results thus obtained, the effectiveness of protection was determined, and the importance of the observation of the principles of radiation hygiene was evaluated. The presumed use of the results of this work in practice is in the optimisation of procedures and measures leading to the maximum possible reduction of the radiation load in percutaneous interventions, and to the education and guidance of personnel towards consequential compliance with all principles of the radiation hygiene.
|
guest ::
