Clinical value of application of low dose scanning technology in the dual source CT coronary angiography

Abstract

Objective To observe the clinical value of application of low-dose scanning technology in dual source CT coronary angiography. Methods 200 cases who received coronary artery imaging were randomly selected as the study subjects.Patients were divided into the observation group and the control group using the random number method, 100 cases in each group.All patients underwent dual source CT angiography.The observation group was treated by adaptive prospective ECG gated sequence, the control group was treated with retrospective ECG gated sequences.The image quality and radiation dose to bear were compared between the two groups. Results The various stages of image score proportion between the two groups had no significant difference(P>0.05). The average score of reading image of the observation group was (1.52±0.33)points, which of the control group was (1.48±0.46)points, there was no difference between the two groups(t=0.857, P>0.05). The CTDL, DLP and ED in the observation group were significantly lower than the control group[the observation group: CTDL(23.41±5.82), DLP(224.61±85.44), ED(3.01±1.12)mSv; the control group: CTDL(34.09±6.77), DLP(82.93±94.28), ED(5.33±2.01)mSv], and the differences were statistically significant(t=11.963, 12.443, 10.083, all P<0.05)]. Conclusion Prospective ECG gated sequence technology can effectively reduce the radiation dose of the patients under dual source CT coronary angiography, reduce probability of radiation damage, and the image quality is not changed obviously, which meets the needs of clinical diagnosis. Key words: Radiography, dual-enery scanned projection; Tomography, X-ray computed; Coronary vessels