Table 2 The results of SNR and CNR between different image reconstructions in the proximal and distal segments of coronary arteries
Parameter | FBP | Hybrid IR | DLR | SR-DLR | P-value |
|---|---|---|---|---|---|
SNR | |||||
 Proximal | |||||
  RCA | 20.4 ± 8.0 | 27.9 ± 10.0 | 35.0 ± 11.1 | 43.8 ± 17.6 | 0.001 |
  LMA | 18.2 ± 7.5 | 25.6 ± 9.0 | 33.8 ± 10.4 | 40.8 ± 12.5 | 0.001 |
  LAD | 19.7 ± 7.9 | 26.4 ± 8.6 | 35.0 ± 11.2 | 43.1 ± 13.9 | 0.001 |
  LCX | 19.9 ± 7.7 | 26.6 ± 8.9 | 36.1 ± 12.4 | 45.6 ± 17.9 | 0.001 |
 Distal | |||||
  RCA | 17.1 ± 7.4 | 23.9 ± 9.6 | 32.1 ± 12.0 | 42.4 ± 16.1 | 0.001 |
  LAD | 20.7 ± 8.4 | 27.6 ± 10.4 | 34.3 ± 13.3 | 46.4 ± 17.1 | 0.001 |
  LCX | 20.9 ± 8.7 | 27.9 ± 9.9 | 33.1 ± 10.8 | 45.5 ± 19.5 | 0.001 |
CNR | |||||
 Proximal | |||||
  RCA | 16.8 ± 8.2 | 22.4 ± 8.5 | 27.3 ± 8.7 | 36.2 ± 12.3 | 0.001 |
  LMA | 16.3 ± 7.6 | 22.1 ± 7.6 | 27.6 ± 7.7 | 36.6 ± 11.4 | 0.001 |
  LAD | 16.6 ± 8.3 | 22.3 ± 8.3 | 27.0 ± 8.4 | 36.5 ± 12.2 | 0.001 |
  LCX | 16.3 ± 7.6 | 21.6 ± 8.0 | 26.7 ± 8.3 | 36.3 ± 12.1 | 0.001 |
 Distal | |||||
  RCA | 15.9 ± 7.6 | 21.2 ± 8.0 | 25.3 ± 8.3 | 34.9 ± 12.0 | 0.001 |
  LAD | 17.0 ± 8.1 | 22.5 ± 8.2 | 26.4 ± 8.6 | 36.4 ± 12.5 | 0.001 |
  LCX | 16.3 ± 7.6 | 21.5 ± 7.8 | 25.7 ± 7.9 | 36.3 ± 12.1 | 0.001 |