Analysis of the low-dose, low-concentration scanning technique of CT in patients with acute pulmonary embolism
急性肺动脉栓塞患者应用CT低剂量，低浓度扫描技术的临床价值分析

摘要

目的 综合分析急性肺动脉栓塞（acute pulmonary embolism, APE）患者应用CT低剂量和低浓度扫描技术的临床价值。方法 本次研究的主要对象为：APE患者（共86例，病例选取时间开始于2021年3月，截止时间为2022年3月）。按照数字随机表法分为2组（每组均为43例），一组为对照组（应用常规CT扫描技术），另一组为实验组（应用CT低剂量、低浓度扫描技术）。结果 对比两组CT剂量指数、CT值、噪声、图像信噪比（SNR）、对比噪声比（CNR），结果表明实验组高于对照组（P＜0.05）。对比两组图像评分、阳性检出率、肺动脉主干、左肺肺动脉、右肺肺动脉、左右上叶肺动脉、左右基底段肺动脉亚段、左右基底段肺动脉，结果表明两组比较无差异（P＞0.05）。对比两组辐射剂量（DLP），结果表明实验组低于对照组（P＜0.05）。结论 APE患者应用CT低剂量、低浓度扫描技术的临床价值高于常规CT扫描技术，与此同时能够显著降低DLP，提高SNR、CNR、CT剂量指数以及CT值等。

Abstract

Objective: To comprehensively analyze the clinical value of the low-dose and low-concentration application of CT scanning technology in patients with acute pulmonary embolism (APE).
Methods: The main subjects of this study were: APE patients (86 cases were selected in March 2021 and ended in March 2022). According to the digital random table method, it was divided into two groups (43 cases in each group), one was control group (applying conventional CT scanning technology) and the other was experimental group (using CT low dose and low concentration scanning technology).
Results: Comparing the CT dose index, CT value, noise, image signal-to-noise ratio (SNR), and contrast noise ratio (CNR), the results showed that the experimental group was higher than the control group (P <0.05). Comparing the two groups of image scores, the positive detection rate, the main pulmonary artery, left pulmonary artery, right pulmonary artery, right pulmonary artery, left and right superior pulmonary artery, left and right basal pulmonary artery subsegment, and left and right basal pulmonary artery, the results showed no difference between the two groups (P> 0.05). Comparing the two groups of radiation doses (DLP), the results showed that the experimental group was lower than the control group (P <0.05).
Conclusion  : The clinical value of applying CT low-dose and low-concentration scanning technology in APE patients is higher than the conventional CT scanning technology, which can significantly reduce DLP, improve SNR, CNR, CT dose index and CT value.