ABSTRACT
Objective To evaluate the value of multi-slice spiral computed tomography angiography(MSCTA)scanning and reconstruction technology in detecting anomalous origin of coronary artery(AOCA).Methods Retrospective analysis was done in 3 856 patients who accepted MSCTA.Volume rendering(VR),multi-planar reformation(MPR),curved planar reformation(CPR)and maximum intensity projection(MIP)were used to observe the origin and course of coronary artery.Results 42 patients with AOCA were detected among 3 856 objects,and the detection rate was 1.09%.The detection rates had no statistically significant difference between male(1.17%)and female(0.98%).The rate of patients with anomalous origin of left coronary artery was 30.95%(13/42), and 9 objects(69.23%,9/13)of them had the anomalous origin of left circumflex.The rate of patients with anomalous origin of right coronary was 66.67%(28/42),and 35.71% of them(17/28)were found to have the anomalous origin of right coronary artery from the left sinus of valsalva.Conclusion MSCTA scanning and reconstruction technology is noninvasive,rapid,accurate and intuitive.
ABSTRACT
Purpose To explore the diagnostic value of multiple image technique derived from dual-energy CT in arterial+parenchymal phase scan mode in detecting pancreatic adenocarcinoma so as to provide more valuable information for clinical treatment.Materials and Methods Thirty two patients with pancreatic adenocarcinoma proved pathologically underwent dual-phase scan with dual-source CT.Linear blend image,non-linear blend image and iodine map were acquired.The absolute enhancement value of tumor (AEV),the relative enhancement value of tumor (REV),enhancement ratio (ER) of tumor to pancreatic parenchyma,and the image contrast to noise ratio (CNR) were also calculated,so that the diagnostic value and the ability image in two phases to display the pancreatic adenocarcinoma lesions could be assessed.Results On arterial phase,the differences in AEV,REV and CNR value were significant among the three groups images (P＜0.05).On parenchymal phase,the difference in REV,ER,and CNR value were also significant among the three groups (P＜0.05).When the three sequences on the 2 phases were compared with each other,the differences in AEV and REV value of tumor tissues were significant among the groups (P＜0.05).Moreover,the differences of ER value in linear blend image and CNR in the iodine map were significant in dual phase enhancement (P＜0.05).Conclusion Dualenergy CT enhanced scan mode on dual phase combined with multiple sequences can improve the sensitivity in detection of pancreatic adenocarcinoma lesions.