Figure 1.
TLD locations in the anthropomorphic phantom.
(A) The scan range included the entire lung from apex to base. (B) A total of 68 TLDs were placed at 22 phantom sites.
Table 1.
Imaging parameters for our pediatric phantom study.
Figure 2.
Axial CT slices of the pediatric anthropomorphic phantom at the level of the 8th thoracic vertebra for different image protocols: (A) 64-slice CT; (B) 256-slice CT. Red circle indicates a chosen ROI.
Figure 3.
A comparison of (A) cardiac image quantum index (CIQI), (B) signal-to-noise ratio (SNR), (C) image noise, (D) effective mAs and (E) effective dose from TLD measurement for different imaging protocols.
Figure 4.
Linear regression analysis of (A) SNR versus CIQI, (B) image noise versus CIQI (C) SNR versus effective mAs, (D) image noise versus effective mAs, (E) effective dose from TLD measurement versus effective mAs.
The correlations were calculated based on the whole 50 ROIs.
Figure 5.
A comparison of the effective dose measured with DLP method and TLD method.
Table 2.
Organ dose and effective dose values obtained from TLD measurements for different acquisition protocols.