Comparison of different automatic bolus tracking thresholds for 64-slice spiral CT angiography in pulmonary artery
GU Qing-chun
XUE Chun-hua
FAN Hua-hui
CHEN Wei
LV Chuan-guo
JIANG Hua-dong
YANG Bo
Abstract：Objective To compare the quality of the images using different thresholds of automatic bolus tracking in 64‐slice spiral CT angiography of pulmonary arteries ,hoping to get the best threshold .Methods Sixty patients were ran‐domly divided into three groups ,and the automatic bolus tracking thresholds of pulmonary CT value plus 5 HU (group A) ,45 HU(group B) ,85 HU(group C) in the pulmonary trunk were used respectively .The CT values of pulmonary ar‐tery ,pulmonary vein and aorta among four groups were compared ,at the same time ,the excellent rates of image under different thresholds were compared .Results The CT values of pulmonary artery ,pulmonary vein and aorta among three groups had statistical difference ,the excellent rate of image under different thresholds had significant difference ( P <0.001) ,there was significant difference between group A and the other two groups ( P <0 .001) ,there was also signifi‐cant difference between group B and group C ( P <0 .001) .Conclusion The bolus tracking thresholds of pulmonary CT value plus 5 HU in the pulmonary trunk is preferable .
Keywords：Pulmonary arteryTomographyX-ray computerAngiographyThreshold
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1370-1372,1376 )