Patient radiation dose during angiography and embolization for abdominal hemorrhage: the influence of CT angiography, fluoroscopy system, patient and procedural variables

CVIR Endovascular

Table 6 Comparison of procedure number, mean fluoroscopy time, air kerma-area product, reference air kerma between the RAD-IR study, old fluoroscopy system and new fluoroscopy system

	N	FT (min)		PKA (cGy.cm2)		K_a,r (mGy)
		Mean (95% CI)	Range	Mean (95% CI)	Range	Mean (95% CI)	Range
RAD-IR	94	25.8 (22.2–29.5)	3.5–93.7	34,757 (30,599–38,915)	2713– 129,465	2367 (2037–2697)	105–7160
OS	61	19.6 (16.4–22.8)	1.33–61.9	28,540 (23,524-33,555)	138.5–96,876	1688 (1074-2302)	100–17,100
% Reduction compared to RAD-IR		24.0		17.9		28.7
NS	93	20.8 (18.1–23.4)	0.6–62.4	11, 875 (8979-14,770)	261–63,118	778 (594–962)	52.8–3323
% Reduction compared to RAD-IR		19.4		65.8		67.1

Note: The RAD-IR study used mean and not median values for FT, PKA and K_a,r. Percentage reduction of PKA and K_a,r are calculated relative to the RAD-IR mean dose. N number, OS old system (Axiom Artis DTA), NS new system (Axiom Artis Q), BMI body mass index, FT fluoroscopy time, PKA air kerma-area product, K_a,r reference air kerma. N/A not available