呼吸门控技术在PET采集中的应用优势及技师所受辐射剂量分析

发布时间：2018-02-27 02:16

本文关键词： 呼吸门控采集技术 PET 应用优势辐射剂量辐射防护　出处：《医疗卫生装备》2016年12期 　论文类型：期刊论文

【摘要】：目的 :通过对比呼吸门控采集技术与常规采集技术所得的图像,找出呼吸门控技术的优势;监测技师在使用该技术时所受的辐射剂量,从辐射防护角度验证该技术的可行性。方法:从2015年3月1日至8月30日间接受PET/CT检查的患者中选择50例符合条件的患者,入组条件为患者肺部孤立性结节。在常规PET采集之后加做呼吸门控技术采集,请1位主治医师(博士)、1位主任医师进行盲测,对比2次采集病灶的形态大小、最长径、体积以及标准摄取值(standard uptake value,SUV),出具详细的核医学报告;利用个人辐射检测仪监测技师使用该技术时所受的辐射剂量,利用统计学软件进行分析。结果:采用呼吸门控技术后,很大程度上减少了患者呼吸运动带来的伪影,病灶显示更清晰、边缘更易于区分,使测量病灶的长度、体积、SUV等结果更加准确。参照放射人员辐射安全标准,分析技师安装和拆卸呼吸压敏元件所受的辐射剂量符合安全规范。结论:在符合技师辐射剂量安全标准的前提下,对肺部孤立性结节的患者采用呼吸门控技术采集,是PET采集抵消呼吸运动伪影的一个可行性高、效果好的技术,值得临床广泛开展应用。
[Abstract]:Objective: to find out the advantages of respiratory gating technology by comparing the images obtained from respiratory gated acquisition technology and conventional acquisition technology, and to monitor the radiation dose received by technicians when using this technique. The feasibility of the technique was verified from the perspective of radiation protection. Methods: from March 1st 2015 to August 30th, 50 eligible patients were selected for indirect PET/CT examination. Pulmonary solitary nodule was selected as the condition. After routine PET acquisition, respiratory gating technique was added. One attending physician (doctor and one chief physician) was asked to carry out blind measurement, and the size and the longest diameter of the lesions were compared. The volume and standard uptake value of the standard uptake value are used to produce detailed nuclear medicine reports; the radiation doses received by technicians when using the technique are monitored by a personal radiation detector; and analyzed by statistical software. Results: after the use of respiratory gating technology, It greatly reduces the artifact caused by the patient's respiratory movement. The focus is clearly displayed and the edges are easier to distinguish. The results of measuring the length of the lesion, the volume of the SUV, etc., are more accurate, as per the radiation safety standards of the radiologist. It is analyzed that the radiation dose received by the technician in installing and disassembling the respiratory pressure sensitive element conforms to the safety specification. Conclusion: under the premise of meeting the safety standard of radiation dose of the technician, the patients with solitary pulmonary nodules were collected by respiratory gating technique. It is a feasible and effective technique for collecting and cancelling respiratory motion artifacts by PET, which is worthy of extensive clinical application.
【作者单位】：四川省肿瘤医院;
【基金】：四川省科技厅计划项目(2015JY0026)
【分类号】：R817.4

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