Keywords:
Interventional vascular, Radioprotection / Radiation dose, Soft tissues / Skin, Fluoroscopy, Radiation safety
Authors:
M. Dehairs, H. Bosmans, G. Maleux, N. Marshall; Leuven/BE
DOI:
10.26044/ecr2019/C-2855
Results
Over a period of 12 months,
33 of a total of 1414 cases had a PSD above 2Gy,
of which 11 cases were above 3Gy.
The maximal PSD was 6.3 Gy. Also,
67 cases had a DAP above 300 Gy.cm² of which 17 were above 500 Gy.cm².
These cases had a wide range of pathologies and treatments,
meaning it is not simple to predict high PSD based on the type of procedure alone.
Some examples of procedures were: Pre-SIRS,
embolization epigastrica inferior,
relining TIPPS,
stent AMS,
TACE for HCC,
etc.
The linear correlation between DAP and PSD was relatively poor with an R² value of 0.79 while the correlation between PSD and Ka,r was noticeably better with an R² value of 0.93 ( Fig. 2 ).
Six cases were found with a PSD above 2Gy,
while having a DAP or Ka,r well below their respective trigger values. All these cases had a high number of lateral views,
meaning the tube is much closer to the patient and the patient is no longer protected by the table causing much higher PSD ( Fig. 3 ).
Additionally,
four cases had a DAP above 500 Gy.cm² while having a PSD below 2Gy.
All these cases had higher number of rotational scans and used larger fields of views ( Fig. 4 ).