Service d'Imagerie Médicale, CHU de la Cavale Blanche, Boulevard Tanguy Prigent, 29609, Brest Cedex, France.
Laboratoire de traitement de l'information médicale-LaTIM (Inserm UMR 1101), 5 Avenue Foch, 29200, Brest Cedex, France.
Eur Radiol. 2019 Sep;29(9):4930-4936. doi: 10.1007/s00330-019-06041-x. Epub 2019 Feb 15.
This technical note describes a novel CT scan protocol that includes a non-enhanced CT, dynamic CTA, and perfusion of the whole brain and CTA of the carotid arteries using a 320-row area detector CT scanner, with a unique contrast injection and acceptable radiation exposure dose in patients presenting with acute ischemic stroke. The acquisition parameters and reconstruction parameters will be discussed including the use of model-based iterative reconstruction (MBIR), time summing (tMIP), and subtraction techniques to optimize the results of this protocol.Key Points• Scanning on a 320-row area detector CT can achieve both brain perfusion with dynamic angiography and reconstructed arterial and venous CTA, and supra aortic trunk angiography, in a single acquisition. • It provides, in a single exam, a full diagnostic workup, i.e., all the acquisitions that are needed to make a quick decision, with reasonable exposure to ionizing radiation and reduced amount of medium contrast, in case of acute ischemic stroke presentation.
本技术说明描述了一种新的 CT 扫描方案，该方案包括非增强 CT、动态 CTA 和全脑灌注以及使用 320 排探测器 CT 扫描仪进行颈动脉 CTA，在急性缺血性脑卒中患者中具有独特的对比注射和可接受的辐射暴露剂量。将讨论采集参数和重建参数，包括使用基于模型的迭代重建（MBIR）、时间总和（tMIP）和减影技术来优化该方案的结果。
要点
• 在 320 排探测器 CT 上进行扫描，可以在单次采集的情况下同时实现脑灌注、动态血管造影以及重建的动脉和静脉 CTA 和主动脉弓上血管造影。
• 它在单次检查中提供了完整的诊断检查，即在急性缺血性脑卒中发作时，只需进行一次快速决策所需的所有采集，同时可合理地减少电离辐射暴露和造影剂用量。
