ESCR 2016 / P-0018
Dose and image quality in CT pulmonary angiography: Comparison of Dual-Source CT, third generation Dual-Energy CT and conventional 64-slice spiral CT
Congress: ESCR 2016
Poster No.: P-0018
Type: Scientific Poster
Keywords: Cardiovascular system, CT-Angiography, Contrast agent-intravenous, Dosimetry, Dosimetric comparison
Authors: A. Kosmala, T. Gassenmaier, S. Veldhoen, A. Kunz, T. A. Bley, B. Petritsch; Würzburg/DE

Results

 

Mean CTDIvol and DLP were significantly lower (CTDIvol: 1 vs. 3: p<0.001; 2 vs. 3: p=0.002 / DLP: 1 vs. 3: p<0.001; 2 vs. 3: p<0.001) in group 3 (4.49±1.48 mGy / 161±55 mGycm) compared to group 1 (7.45±2.72 mGy / 252±96 mGycm) and group 2 (6.46±3.72 mGy / 228±136 mGycm).

 

Subjective image quality was rated good to excellent in >91% (110/120) with an interreader agreement of 90.3%.

 

The three protocols did not significantly differ in subjective image quality.

 

While group 3 presented with higher BN levels (1 vs. 3: p=0.003; 2 vs. 3: p=0.026), background noise was similar between group 1 and group 2. The SNR was highest in group 2 (1 vs. 2: p<0.002; 2 vs. 3: p<0.001) and similar between groups 1 and 3.

 

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