Keywords:
Calcifications / Calculi, Arteriosclerosis, Screening, Diagnostic procedure, CT, Cardiac
Authors:
K. Zhuravlev, V. Sinitsyn, A. Spektor; Moscow/RU
Results
The study comprised 398 patients. The standard CT protocol was used in 202 cases, and the low-dose one in 196 cases. The value of CACS=0 was found in 109 patients (27%). The mean Agatston values of CACS were 395 ± 583 for gated CACS and 384 ± 602 for non-gated CACS (p=0.41). The correlation between CACS obtained with gated and non-gated CT was high even when "zero" values of CACS were excluded (Agatston: r = 0.975; Volume: r = 0.977; Mass: r = 0.976) (Fig. 1). There were no significant difference between correlation coefficients calculated separately for standard-dose and low-dose CT groups (r: 0.97 vs 0.979, p=0.065) (Fig. 2-3). The chest CT radiation dose was significantly less than in combination with the gated CACS (2±0.6 vs 3.5±0.7 mSv; p<0.001). Moreover, the radiation dose in low-dose chest CT was significantly less compared to the radiation dose obtained by the calcium scoring (0.9±0.3 vs 1.4±0.2 mSv; p<0.001)(Fig. 4).