Unit:
Κατεύθυνση Ιατρική Φυσική-ΑκτινοφυσικήLibrary of the School of Health Sciences
Supervisors info:
Ιωάννης Σεϊμένης, Καθηγητής, Ιατρική, Δημοκρίτειο Πανεπιστήμιο Θράκης
Ευστάθιος Ευσταθόπουλος Καθηγητής, Ιατρική, ΕΚΠΑ
Σταύρος Σπηλιόπουλος, Επίκουρος Καθηγητής, Ιατρική, ΕΚΠΑ
Original Title:
Evaluation of the radiation dose to the eye lens and head of interventional radiologists
Translated title:
Evaluation of the radiation dose to the eye lens and head of interventional radiologists
Summary:
The complexity of interventional radiology procedures as well as the high dose rates in conjunction with the rapid increase of interventional radiology procedures, have led to increased exposure levels among interventional radiologists. The aim of this master thesis was the evaluation of the radiation dose to the eye lens and head of interventional radiologists.
The measurements were conducted with thermoluminescence detectors (TLDs) for three general types of interventional procedures, including: i) Angioplasties lower limps (N=70), ii) Embolizations/Chemoembolizations (N=15) and iii) Vertebroplasties (N=13). Two groups of interventional radiologists participated in this study; the one group performed DSA/PTA LL and Embolization/Chemoembolization procedures and the other Vertebroplasty procedures. A set of 7 dosimeters was attached to each physician for each procedure. TLDs’ positions were the following: left side of the temple, over the left eyebrow, over the right eyebrow, right side of the temple, near the left eye, in the middle of the eyes and near the right eye from which the corresponding doses were calculated.
Statistical tests were performed for detecting possible differences between the doses per procedure on the left and right sides of the head, as well as between the doses per procedure to the eye lenses and forehead. in addition, statistical tests ware used to demonstrate whether there was a correlation between the interventional radiologists’ experience and the received doses per procedure. Furthermore, we examined whether there was a linear relationship between the DAP and the dose per procedure, as well as between the doses per procedure on the head’s left and right side. In the end, we compared the results with the recommended occupational annual limits. In conclusion, among the three types of procedures examined Vertebroplasties deliver the highest values of radiation burden both to the primary and assistant operator. The statistical tests’ results revealed that the left side of the head received higher dose than the right, as well as the eye lenses than the forehead. Moreover, the interventional radiologist’s experience correlated only with the received dose on the left eye lens. The results showed there is no linear relationship between the DAP and the doses in any of the examined anatomic regions. On the other hand, a strong linear relationship was found between the doses per procedure on the head’s left and right side. Finally, we should emphasize that the use of radiation protective devices is of critical importance in order to avoid exceeding of the occupational annual limits.
Main subject category:
Health Sciences
Keywords:
Interventional radiologists, Radiation dose, Eye lens, Forehead's sides, DSA/PTA LL, Embolization/chemoembolization, Vertebroplasty
