Table 2.

Technical characteristics

	Low dose N = 100	Normal dose [14] N = 17	P value
Exposure parameters
Tube voltage 3DRA (kV)	70 (60–96)	90 (90–90)	< 0.001
Tube current 3DRA (mA)	228 (53–395)	69 (26–363)	< 0.001
Exposure time 3DRA (ms)	465.5 (333.2–1330)	843.2 (452.2–868)	< 0.001
Skin dose 3DRA (mGy)	9 (1.7–83)	20,86 (10,33–90,69)	< 0.001
DAP 3DRA (mGy·cm2)	1279 (150–16,987)	3128 (1231–17,273)	< 0.001
Procedural time (min)	153 (30–360)	165 (60–540)	0.360
Total fluoroscopy time (min)	28 (0.4–121)	22 (6.4–81.4)	0.497
Effective dose
3DRA (mSv)	0.54 (0.12–2.23)	1.62 (0.70–4.94)	< 0.001
Fluoroscopy (mSv)	1.53 (0.00–25.40)	4.4 (0.2–15.8)	0.002
Angiography (mSv)	0.45 (0.00–19.33)	3.6 (0–79.1)	0.009
Total catheterization (mSv)	2.64 (0.27–28.13)	12.4 (2–99.9)	< 0.001
Interventional group	3.65 (0.49–28.13)
Diagnostic group	0.86 (0.27–10.09)

Values represent median and range