Keywords:
Congenital, Contrast agent-intravenous, CT-Angiography, CT, Cardiovascular system, Cardiac
Authors:
N. Rokytska1, R. Tammo1, T. Yalynska2, H. Morkovkina1, A. Halchenko3; 1Kyiv/UA, 2Kyiv, Kyiv/UA, 3Kiev/UA
DOI:
10.1594/ecr2018/C-0780
Methods and materials
Between 2011–2017,
29 patients (5 girls,
24 boys) with a mean age 7,4 ± 5 months,
with HS with RI underwent MDCT to recognition of the spectrum of CHD.
The MDCT images were acquired on a 16 slices scanners in all patients after performing echocardiography.
- CT dose parameters of 80 kV and 40 mAs with tube current modulation were set for all patients.
- CT data were obtained using the following parameters: detector collimation,
1.5 mm; slice thickness,
2 mm; Increment,
1 or 2 mm; Feed /Rotation,
18 mm/sec; gantry rotation time,
0.5 sec.
- The scan range was from the thoracic inlet to the top of the iliac wings.
In all scans,
dose modulation (CARE Dose 4D) was used to minimize the radiation dose.
- Nonionic iodinated contrast material (320 mg/ml) was injected at a rate varying from 1.2 ml/sec to 2.5 ml/sec.
- The scan delay was determined using bolus tracking in the descending aorta with a 4 seconds delay after trigger,
repetitive monitoring scans were performed within the lumen of the descending aorta as the region of interest with the threshold of starting the diagnostic scans as 80 HU.