Table 2 Quantitative and qualitative analysis of the CCTA images.

From: Diagnostic accuracy of low-radiation coronary computed tomography angiography with low tube voltage and knowledge-based model reconstruction

 

61 Patients

Attenuation of the aortic root

469.1 ± 67.8 HU

Noise

31.8 ± 8.6

SNR

RCAa

15.38 ± 2.80

LMb

14.37 ± 2.53

LADc

13.86 ± 2.56

LCxd

14.27 ± 3.02

CNR

RCA

18.25 ± 2.76

LM

17.28 ± 2.64

LAD

16.65 ± 2.55

LCx

17.02 ± 3.09

Image quality

Per-vessel analysis

3.40 ± 0.68

   RCA

3.70 ± 0.53

   LM

3.90 ± 0.35

   LAD

3.41 ± 0.62

   LCx

3.35 ± 0.71

No. of segments

No. of segments in each score (%)

768 (100)

   Grade 4 (Excellent)

391 (50.9)

   Grade 3 (Good)

293 (38.2)

   Grade 2 (Adequate)

84 (10.9)

   Grade 1 (Poor)

0 (0)

  1. Data are presented as mean ± standard deviation. Abbreviations: aRight coronary artery, bLeft main coronary artery, cLeft anterior descending artery, dLeft circumflex artery. Segments with a diameter of at least 1.5 mm at the origin were included.
  2. CCTA: coronary computed tomographic angiography.
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