Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 S. Kingshighway Blvd, St Louis, MO 63110 (M.J.S., S.B.); and Siemens Healthineers, Malvern, Pa (M.C.).
Radiol Imaging Cancer. 2021 Jan 15;3(1):e200097. doi: 10.1148/rycan.2021200097. eCollection 2021 Jan.
Technical advances in CT have enabled implementation of dual-energy CT into routine clinical practice. By acquiring images at two different energy spectra, dual-energy CT enables material decomposition, allowing generation of material- and energy-specific images. Material-specific images include virtual nonenhanced images and iodine-specific images (iodine maps). Energy-specific images include virtual monoenergetic images. The reconstructed images can provide unique qualitative and quantitative information about tissue composition and contrast media distribution. In thoracic oncologic imaging, dual-energy CT provides advantages in characterization of thoracic malignancies and lung nodules, determination of extent of disease, and assessment of response to therapy. An especially important feature in children is that dual-energy CT does not come at a higher radiation exposure. CT, CT-Quantitative, Lung, Mediastinum, Neoplasms-Primary, Pediatrics, Thorax, Treatment Effects © RSNA, 2021.
CT 技术的进步使双能 CT 得以在常规临床实践中应用。通过在两个不同能谱上采集图像，双能 CT 实现了物质分解，从而生成物质特异性和能量特异性图像。物质特异性图像包括虚拟平扫图像和碘特异性图像（碘图）。能量特异性图像包括虚拟单能量图像。重建图像可以提供有关组织成分和对比剂分布的独特定性和定量信息。在胸部肿瘤成像中，双能 CT 有助于胸部恶性肿瘤和肺结节的特征描述、疾病程度的确定以及治疗反应的评估。双能 CT 对儿童的一个特别重要的特点是，其不会带来更高的辐射暴露。 CT、CT 定量、肺、纵隔、肿瘤-原发性、儿科学、胸部、治疗效果© RSNA，2021.
