Table 2.

Calcium detectability of CSCT and CCTA reconstructed with different parameters for very low, low, medium and high-density calcification

Scan description	Very low	Low	Medium	High
CSCT	100%	100%	100%	100%
CCTA (FBP, Qr36f, 3.0 mm)	6.7%	60%	100%	100%
CCTA (FBP, Qr44f, 0.4 mm)	100%	100%	100%	100%
CCTA (FBP, Qr36f, 0.4 mm)	100%	100%	100%	100%
CCTA (QIR, Qr36f, 0.4 mm)	100%	100%	100%	100%

Between brackets reconstruction method, kernel, and slice thickness

CSCT calcium scoring computed tomography (reference), CCTA coronary computed tomography angiography, FBP filtered back projection, QIR quantum iterative reconstruction