Xiang Tang MMEDSC, BMEDSC, Presenter: Nothing to Disclose

Bin Lu MD, Abstract Co-Author: Nothing to Disclose

Jinguo Lu MD, Abstract Co-Author: Nothing to Disclose

To analyze the image quality of coronary arteries by dual-source computed tomography(DSCT)in congential heart disease(CHD)childern.

Image quality of coronary arteries were scored by two radiologists in four categories. More than 3 point was considered to be good image quality and with diagnostic value.Score differences among 3 groups of baseline heart rate levels,3 groups of age level and 4 coronary branches were analyzed by using F test and SNK test. Multiple linear regressions were used to analyze the predictors of age,heart rate, tube voltage,tube current, pitch, contrast volume,contrast injection rate with the coronary image scores.

A total of 72 consecutive patients were enrolled (average age of 1.5 years,42 days to 16 years old). Coronary artery branches of 71.2% (205/288) were evaluable. Image quality of left main coronary artery (LM,score of 3.64±0.49),left anterior descending (LAD,score of 2.97±0.40), right coronary artery (RCA,score of 2.82±0.70),left circumflex (LCX, score of 2.76 ± 0.73) were in a descending order (F=29.00,P<0.0001). Image score of age groups of 0-1 years old group(2.80 ± 0.65),1-3 years old group(2.81 ± 0.74),3-14 years old group (3.58± 0.52) were in a ascending order (F=20.16,P<0.0001).3-14 years old group was statistic different from 0-1 years old group and 1-3 years old group,there were no difference between these two groups. Image score of heart rate groups of <100 bpm group(3.54±0.56)，100-150 bpm group(2.86±0.70) and >150 bpm group(2.81±0.63) were in a descending order(F=16.72,P<0.0001).(<100) bpm group was statistic different from 100-150 bpm group and >150 bpm group,there were no difference between these two groups.There were different impact factors predicted image quality of LM, LAD, LCX and RCA.Age(r=0.013,P=0.008)and contrast volume(r=0.292,P=0.011)had positive correlation with LM.age(r=0.509,P<0.001)and voltage(r=0.292,P=0.004)had positive correlation with LAD，Heartrate（r=-0.179,P=0.037)had negative correlation with LAD.Age(r=0.063,P<0.001)had negative correlation with LCX.Age(r=0.486,P=0.011)and Voltage(r=0.220,P=0.035)had positive correlation with RCA.

DSCT could clearly visualizes coronary arteries of CHD children over the age of 3 or heart rate less than 100 bpm. Limitations of  DSCT coronary angiography for CHD children were the relatively young age and fast heart rate.

 

Tang, X, Lu, B, Lu, J, Analysis of Dual Source CT Coronary Angiography of Congenital Heart Disease on Childern.  Radiological Society of North America 2009 Scientific Assembly and Annual Meeting, November 29 - December 4, 2009 ,Chicago IL. http://archive.rsna.org/2009/8007303.html