EuroSafe Imaging 2020
Performed at one institution, Not applicable, Retrospective, Dosimetric comparison, Radiation effects, Dosimetry, Fluoroscopy, Radioprotection / Radiation dose, Action 5 - Performance indicators for radiation protection management
S. Riga, M. M. J. Felisi, F. Campanaro, P. E. Colombo, F. Barbosa, A. G. Rampoldi, A. Torresin
Conclusion and recommendations
For the procedures considered, a better correlation has been found between PSD and Ka,r. Specific trigger levels corresponding to a 2 Gy of PSD have been established for each procedure: 1.5 Gy ± 0.3 for TIPS, 2.5 ± 0.5 Gy for PAE and 2.0 ± 0.5 Gy for TACE, EUF and EVAR. In particular, the lowest alert level was found for TIPS procedures, for which very few X-ray beam angles are used; this causes a small dose spread on patient’s skin and the accumulation of skin dose. It can be noted that all our site and procedure-specific trigger levels are lower than NCRP proposed value which could underestimate the risk in our institution.
The analysis confirms the importance of quantifying the trigger levels locally (Fig. 6), especially for specific types of procedures (for example, in our case for TIPS). In some cases, trigger levels show significant variation depending on the procedure. This work suggests using air-kerma values to define local dose alert levels of some interventional radiological procedures to help operators to recognize cases of threshold dose overshoot and to prevent patient’s skin injuries.