The technology feasibility studies and image quality evaluation of computed tomographic pulmonary angiography using dual-energy subtraction
10.3969/j.issn.1002-1671.2015.04.012
- VernacularTitle:双能量减影 CT 肺动脉造影技术可行性研究
- Author:
Aiguo BAI
;
Yibo SUN
;
Fang LU
;
Shihong LI
;
Yanqing HUA
- Publication Type:Journal Article
- Keywords:
computed tomography;
pulmonary angiography;
dual-energy subtraction;
pulmonary embolism
- From:
Journal of Practical Radiology
2015;(4):566-570
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess quantitative and subjective image quality in computed tomography pulmonary angiography (CT-PA)with dual-energy subtraction methods,and to select the best dual-energy subtraction method.Methods 30 consecutive patients underwent CTPA using a single tube,fast voltage switching technique.One set of routine poly-chromatic images (RPI),two sets of monochromatic images with different optimal contrast-to-noise ratios (OCNR)and three sets of dual-energy subtraction images (DE-SI)were obtained by a dedicated workstation with dual-energy software (AW4.5 Advantage WS;GE Healthcare).For all the six sets of images,CNR and the score of global subjective image quality were calculated.Results DESI 3 got the highest CNR,and DESI 1 got the next high CNR.In global subjective image quality,DESI 1 got the highest score.However,when compared with DESI 2,no significant difference was found.Conclusion CTPA with dual-energy subtraction technique is feasible.DESI 1 affords the best bal-ance between quantitative analysis and subjective evaluation compared with other sets of images.
