Naidich D P
Department of Radiology, New York University Medical Center, Bellevue Hospital, New York.
Radiol Clin North Am. 1994 Jul;32(4):759-74.
Intuitively, any technique that minimizes the effects of respiratory motion, eliminates misregistration between scans, minimizes intravenous contrast requirements, and allows high quality multiplanar and 3-D image reconstruction is likely to have a tremendous impact on conventional notions concerning routine thoracic CT. Helical scanning is already of proved efficacy for vascular and airway imaging as well as for identifying and characterizing pulmonary nodules. It may be anticipated that the indications for the use of helical imaging will continue to expand. Of particular interest is the ongoing development of reconstruction algorithms that allow high-quality images to be obtained with rapid table incrementation while simultaneously reducing radiation exposure. Given the intrinsically high contrast of structures within the thorax coupled with the disadvantages that result from respiratory motion, it is not unreasonable to conclude that within the near future volumetric techniques will be the standard for nearly all CT applications within the thorax.
直观地说，任何能够将呼吸运动的影响降至最低、消除扫描间配准误差、减少静脉造影剂用量并允许进行高质量多平面和三维图像重建的技术，都可能对有关常规胸部CT的传统观念产生巨大影响。螺旋扫描在血管和气道成像以及识别和表征肺结节方面已被证明有效。可以预期，螺旋成像的应用指征将继续扩大。特别值得关注的是正在开发的重建算法，这些算法能够在快速增加扫描床移动速度的同时获得高质量图像，同时减少辐射剂量。鉴于胸部结构本身具有高对比度，再加上呼吸运动带来的不利影响，得出在不久的将来容积技术将成为几乎所有胸部CT应用的标准这一结论并非不合理。
