Johnson Pamela T, Naidich David, Fishman Elliot K
The Russell H. Morgan Department of Radiology and Radiologic Sciences, Johns Hopkins School of Medicine, 601 N. Caroline Street, Room 3251, Baltimore, MD 21287, USA.
Emerg Radiol. 2007 Feb;13(5):243-9. doi: 10.1007/s10140-006-0547-z. Epub 2006 Nov 29.
The purpose of this study was to determine the extent to which a consensus exists on multidetector row computed tomography (MDCT) protocol parameters for suspected pulmonary embolism (PE). In August of 2004, a questionnaire addressing a number of body MDCT protocols was mailed to 99 fellows of the Society of Computed Body Tomography, representing a total of 46 institutions. In May 2005, this was followed up with a second mailing. The survey requested details pertaining to protocols for the most advanced MDCT scanner in the department. The overall survey response rate of 37% (17/46) yielded 15 protocols for 16-MDCT imaging of suspected PE. This data was tabulated and revealed a consensus for the use of bolus tracking, rapid contrast infusion, caudo-cranial scanning, the narrowest detector row collimation, and thin (<2 mm) reconstruction sections. However, contrast infusion timing, contrast concentration, and implementation of radiation dose modulation were variable. This compilation of protocols reflects recently published studies advocating the use of narrow acquisition collimation and reconstruction sections for MDCT of suspected PE. Future studies are necessary to elucidate the optimal intravenous contrast infusion parameters and further assess the efficacy of reduced radiation dose protocols.
本研究的目的是确定在疑似肺栓塞（PE）的多排螺旋计算机断层扫描（MDCT）协议参数方面存在多大程度的共识。2004年8月，一份涉及多个身体部位MDCT协议的问卷被邮寄给了计算机体层摄影学会的99名会员，这些会员代表了46个机构。2005年5月，进行了第二次邮寄跟进。该调查要求提供有关部门中最先进MDCT扫描仪协议的详细信息。37%（17/46）的总体调查回复率产生了15份针对疑似PE的16层MDCT成像的协议。这些数据被制成表格，结果显示在使用团注追踪、快速静脉注射造影剂、尾头方向扫描、最窄的探测器排准直以及薄层（<2mm）重建层面方面存在共识。然而，造影剂注射时间、造影剂浓度以及辐射剂量调制的实施情况各不相同。这些协议的汇编反映了最近发表的研究，这些研究主张在疑似PE的MDCT中使用窄采集准直和重建层面。未来有必要开展研究以阐明最佳的静脉注射造影剂参数，并进一步评估降低辐射剂量协议的疗效。
