Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany.
AJNR Am J Neuroradiol. 2012 Nov;33(10):E124-8. doi: 10.3174/ajnr.A2577. Epub 2011 Aug 11.
VOI imaging can provide higher image quality at a reduced dose for a subregion. In this study with a robot-driven C-arm FDCT system, the goals were proof of feasibility for inner ear imaging, higher flexibility during data acquisition, and easier processing during reconstruction. First a low-dose OV scan was acquired allowing an orientation and enabling the selection of the VOI. The C-arm was then moved by the robotic system without a need for patient movement and the VOI was scanned with adapted parameters. Uncompromised artifact-free image quality was achieved by the 2-scan approach and the dose was reduced by 80%-90% in comparison with conventional MSCT and FPCT scans.
VOI 成像可以在降低剂量的情况下提供更高的图像质量，适用于亚区域。在这项使用机器人驱动 C 臂 FDCT 系统的研究中，目标是证明内耳成像的可行性、在数据采集期间具有更高的灵活性，以及在重建期间更易于处理。首先，采集低剂量的 OV 扫描，允许定向并选择 VOI。然后，机器人系统移动 C 臂，而无需患者移动，并使用适应的参数扫描 VOI。通过两扫描方法实现了无伪影的高质量图像，与传统的 MSCT 和 FPCT 扫描相比，剂量降低了 80%-90%。
