Table 3.

Reproducibility of necrotic core and dense calcium by Shin’s method

	Shin’s 1	Shin’s 2	Absolute △	P
Frame (n = 189)
Vessel area, mm²	14.66 ± 3.73	14.66 ± 3.73	0
DC area, mm²	0.39 ± 0.48	0.38 ± 0.48	0.01 ± 0.01	0.96
NC area, mm²	0.82 ± 0.57	0.81 ± 0.56	0.01 ± 0.02	0.95
Segment (n = 8)
Lesion length, mm	10.24 ± 0.28	10.24 ± 0.28	0
Vessel volume, mm³	150.42 ± 35.2	150.42 ± 35.2	0
DC volume, mm³	4.03 ± 3.78	4.00 ± 3.78	0.03 ± 0.02	0.99
NC volume, mm³	8.39 ± 4.58	8.35 ± 4.57	0.06 ± 0.06	0.99

Values are presented as mean ± SD

DC dense calcium, NC necrotic core, P conventional versus Shin’s method, △ difference