A clinical strategy to improve the diagnostic performance of 3T non-contrast coronary MRA and noninvasively evaluate coronary distensibility: combination of diastole and systole imaging

Table 2 Comparison of image quality between coronary MRA at diastole and systole in 107 study participants

Parameter	No. of all segments	At diastole		At systole		P value
Parameter	No. of all segments	Image quality	No. of segments with a score ≥ 3	Image quality	No. of segments with a score ≥ 3	P value
Overall	1319	3.63 ± 0.63	1238	3.72 ± 0.56	1265	< 0.001
RCA
Proximal	107	3.83 ± 0.42	105	3.85 ± 0.38	106	0.640
Middle	105	3.44 ± 0.60	99	3.54 ± 0.64	101	0.063
Distal	104	3.58 ± 0.63	96	3.63 ± 0.58	99	0.426
PDA/PL	93	3.59 ± 0.66	81	3.74 ± 0.53	89	0.013
LM	107	3.95 ± 0.21	107	3.96 ± 0.19	107	0.566
LAD
Proximal	107	3.92 ± 0.31	106	3.95 ± 0.21	107	0.207
Middle	107	3.78 ± 0.46	105	3.89 ± 0.32	107	0.007
Distal	107	3.34 ± 0.75	95	3.68 ± 0.58	103	< 0.001
DA1	96	3.49 ± 0.83	85	3.65 ± 0.67	88	0.018
DA2	74	3.51 ± 0.80	66	3.65 ± 0.65	69	0.017
LCX
Proximal	107	3.87 ± 0.39	105	3.87 ± 0.34	107	> 0.99
Distal	101	3.36 ± 0.66	93	3.43 ± 0.75	89	0.276
OM	104	3.42 ± 0.76	95	3.49 ± 0.79	93	0.145

No. of all segments: including all segments could be visualized in 31 volunteers and segments with lumen diameter ≥ 1.5 mm on CAG images in 76 patients
Data are mean ± standard deviation
MRA magnetic resonance angiography, LM left main coronary artery, RCA right coronary artery, LAD left anterior descending coronary artery, LCX left circumflex coronary artery, PDA posterior descending artery, PL posterolateral branch, DA1 the first diagonal branch, DA2 the second diagonal branch, OM oblique marginal branch

ISSN: 1532-429X