Ladder-Like Low Iodine Delivery Rate Injection Protocols Based on BMI at 70 KV by Automated Tube Voltage Selection in Coronary CTA

Table 6

Subjective image quality comparison.

Point	Diagnostic segments of coronary artery			4 point
	1 point	2 point	3 point
Experimental group	1005	102	2	3
Control group	1011	90	7	4
Z	0.394
P	0.694

Note: data are numbers of segments, and data in parentheses are percentages.