Zeman R K, Fox S H, Silverman P M, Davros W J, Carter L M, Griego D, Weltman D I, Ascher S M, Cooper C J
Department of Radiology, Georgetown University Medical Center, Washington, DC 20007-2197.
AJR Am J Roentgenol. 1993 Apr;160(4):719-25. doi: 10.2214/ajr.160.4.8456652.
Since its clinical introduction in the mid 1970s, techniques for CT have undergone many changes that have dramatically altered how CT scans are obtained. Helical (spiral) CT allows for faster acquisition of truly volumetric CT data than is possible with conventional scanners. Routine helical CT of the abdomen is now possible because of three major technical refinements: the development of the slip-ring gantry, improved detector efficiency, and greater tube cooling capability. This article reviews the technical principles that govern helical CT, the potential advantages and disadvantages of this technique, and initial clinical experience with helical CT of the abdomen.
自20世纪70年代中期CT临床应用以来，CT技术经历了诸多变革，这些变革极大地改变了CT扫描的获取方式。与传统扫描仪相比，螺旋CT能够更快地获取真正的容积性CT数据。由于三项主要技术改进，现在常规腹部螺旋CT成为可能：滑环式扫描架的发展、探测器效率的提高以及更大的管冷却能力。本文回顾了螺旋CT的技术原理、该技术的潜在优缺点以及腹部螺旋CT的初步临床经验。
