REGULAR CONTENT
Final ID
575
Type
Original Scientific Research-Poster Only
Authors
S Morita1, S Suzaki1, U Ishizaki1, K Endo1, H Yamazaki1, Y Nishina1, S Sakai1
Institutions
1Tokyo Women's Medical University, Tokyo, Japan
Purpose
To compare radiation exposure in patients undergoing adrenal venous sampling (AVS) using dynamic trace digital angiography (DTDA), which enhances background compression and image contrast of vessels and devices, and spot fluoroscopy, which allows focused fluoroscopy within an adjustable region of interest under a similar peak dose condition, with radiation exposure in patients not undergoing these techniques.
Materials & Methods
Eleven patients (3 men and 8 women; median age, 50 years; range, 41–64 years) underwent AVS with DTDA and spot fluoroscopy (Group A), and 11 patients (4 men and 7 women; median age, 50 years; range, 27–65 years) underwent AVS with conventional digital subtraction angiography (DSA) and a conventional collimator (Group B) with a single plane system (Infinix Celeve-i; Toshiba Medical Systems, Tokyo, Japan). The dose–area product (DAP), peak skin dose, fluoroscopy time, and number of radiographic frames were compared between the groups with the Mann–Whitney U test.
Results
The acquisition DAP with DTDA in Group A was significantly lower than that with conventional DSA in Group B (5.3 ± 3.7 vs. 29.1 ± 20.1 Gy·cm2, p < 0.001). The fluoro DAP with spot fluoroscopy in Group A was relatively lower than that without in Group B (33.3 ± 22.9 vs. 59.1 ± 35.7 Gy·cm2, p = 0.088). Thus, the total DAP in Group A was significantly lower than that in Group B (38.6 ± 25.9 vs. 88.2 ± 53.6 Gy·cm2, p = 0.006). The peak skin dose in Group A was significantly lower than that in Group B (403 ± 340 vs. 771 ± 416 mGy, p = 0.030). No significant differences in the fluoroscopy time or mean number of radiographic frames were observed between Groups A and B (28.5 ± 11.3 vs. 32.4 ± 14.2 min, p = 0.511; 128 ± 54 vs. 137 ± 58 frames, p = 0.974).
Conclusions
Radiation exposure in patients during AVS can be reduced by approximately half by using DTDA and spot fluoroscopy.
Final ID
575
Type
Original Scientific Research-Poster Only
Authors
S Morita1, S Suzaki1, U Ishizaki1, K Endo1, H Yamazaki1, Y Nishina1, S Sakai1
Institutions
1Tokyo Women's Medical University, Tokyo, Japan
Purpose
To compare radiation exposure in patients undergoing adrenal venous sampling (AVS) using dynamic trace digital angiography (DTDA), which enhances background compression and image contrast of vessels and devices, and spot fluoroscopy, which allows focused fluoroscopy within an adjustable region of interest under a similar peak dose condition, with radiation exposure in patients not undergoing these techniques.
Materials & Methods
Eleven patients (3 men and 8 women; median age, 50 years; range, 41–64 years) underwent AVS with DTDA and spot fluoroscopy (Group A), and 11 patients (4 men and 7 women; median age, 50 years; range, 27–65 years) underwent AVS with conventional digital subtraction angiography (DSA) and a conventional collimator (Group B) with a single plane system (Infinix Celeve-i; Toshiba Medical Systems, Tokyo, Japan). The dose–area product (DAP), peak skin dose, fluoroscopy time, and number of radiographic frames were compared between the groups with the Mann–Whitney U test.
Results
The acquisition DAP with DTDA in Group A was significantly lower than that with conventional DSA in Group B (5.3 ± 3.7 vs. 29.1 ± 20.1 Gy·cm2, p < 0.001). The fluoro DAP with spot fluoroscopy in Group A was relatively lower than that without in Group B (33.3 ± 22.9 vs. 59.1 ± 35.7 Gy·cm2, p = 0.088). Thus, the total DAP in Group A was significantly lower than that in Group B (38.6 ± 25.9 vs. 88.2 ± 53.6 Gy·cm2, p = 0.006). The peak skin dose in Group A was significantly lower than that in Group B (403 ± 340 vs. 771 ± 416 mGy, p = 0.030). No significant differences in the fluoroscopy time or mean number of radiographic frames were observed between Groups A and B (28.5 ± 11.3 vs. 32.4 ± 14.2 min, p = 0.511; 128 ± 54 vs. 137 ± 58 frames, p = 0.974).
Conclusions
Radiation exposure in patients during AVS can be reduced by approximately half by using DTDA and spot fluoroscopy.