The application of 320-slice CT " double-low" MIP imaging technique in obstructive sleep apnea syndrome with coronary heart disease / 中国医师杂志

ABSTRACT

Objective@#To evaluate the value of 320-slice computed tomography (CT) " double-low" maximum density projection (MIP) imaging protocol (low tube voltage and low contrast agent concentration) in obstructive sleep apnea syndrome (OSAS) with coronary heart disease.@*Methods@#40 cases of OSAS with coronary heart disease in our hospital were selected. All patients underwent 320-slice CT " double-low" MIP imaging and received conventional coronary angiography (CAG) within 1 month. With reference to CAG examination results, the accuracy of 320-slice CT " double low" MIP-imaging technique in diagnosing the Obstructive sleep apnea syndrome with coronary heart disease can be evaluated.@*Results@#The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of 320-slice CT" double-low " MIP imaging in the diagnosis of obstructive respiratory sleep disorder with coronary disease were 95.14%, 94.43%, 95.33%, 83.62%, 98.20%. respectively. The heart rate of testers was (65.20±4.79)bpm/min, the dose length product (DLP) was (98.22±32.54)mGy·cm, and the effective radiation dose (ED) was (1.35±0.42)mSv.@*Conclusions@#Compared with CAG, the 320-slice CT " double-low" MIP imaging technique reduced doses of radiation while maintained the good quality of image. Therefore, this technique has high application value as a clinical diagnosis method to diagnose patients with obstructive respiratory sleep disorder and coronary heart disease.