Department of Diagnostic Radiology, Division of Diagnostic Imaging, University of Texas, MD Anderson Cancer Center, Unit 1473, PO Box 301402, Houston, TX, 77230, USA.
Department of Imaging Physics, Division of Diagnostic Imaging, University of Texas, MD Anderson Cancer Center, Unit 1472, PO Box 301402, Houston, TX, 77230-1402, USA.
Abdom Radiol (NY). 2017 Mar;42(3):688-701. doi: 10.1007/s00261-016-1035-x.
Dual-energy CT imaging has many potential uses in abdominal imaging. It also has unique requirements for protocol creation depending on the dual-energy scanning technique that is being utilized. It also generates several new types of images which can increase the complexity of image creation and image interpretation. The purpose of this article is to review, for rapid switching and dual-source dual-energy platforms, methods for creating dual-energy protocols, different approaches for efficiently creating dual-energy images, and an approach to navigating and using dual-energy images at the reading station all using the example of a pancreatic multiphasic protocol. It will also review the three most commonly used types of dual-energy images: "workhorse" 120kVp surrogate images (including blended polychromatic and 70 keV monochromatic), high contrast images (e.g., low energy monochromatic and iodine material decomposition images), and virtual unenhanced images. Recent developments, such as the ability to create automatically on the scanner the most common dual-energy images types, namely new "Mono+" images for the DSDECT (dual-source dual-energy CT) platform will also be addressed. Finally, an approach to image interpretation using automated "hanging protocols" will also be covered. Successful dual-energy implementation in a high volume practice requires careful attention to each of these steps of scanning, image creation, and image interpretation.
双能 CT 成像在腹部成像中有许多潜在的用途。它还根据所使用的双能扫描技术对协议创建有独特的要求。它还生成了几种新的图像类型，这可能会增加图像创建和解释的复杂性。本文的目的是回顾快速切换和双源双能平台的方法，用于创建双能协议，有效地创建双能图像的不同方法，以及在阅读站导航和使用双能图像的方法，所有这些都是使用胰腺多期协议的例子。它还将回顾三种最常用的双能图像类型：“主力”120kVp 替代图像（包括混合多色和 70keV 单色）、高对比度图像（例如，低能量单色和碘物质分解图像）和虚拟未增强图像。最近的发展，例如在扫描器上自动创建最常见的双能图像类型的能力，即用于 DSDECT（双源双能 CT）平台的新“Mono+”图像，也将得到解决。最后，还将介绍使用自动“悬挂协议”进行图像解释的方法。在高容量实践中成功实施双能成像需要仔细关注扫描、图像创建和图像解释的每一个步骤。
