Im Ki Chun, Choi Ik Soo, Ryu Jin-Sook, Eo Gi Seoung, Kim Jae Seung, Moon Dae Hyuk
Department of Nuclear Medicine, University of Ulsan College of Medicine, ASAN Medical Center, Seoul, Republic of Korea.
J Digit Imaging. 2010 Dec;23(6):732-43. doi: 10.1007/s10278-009-9227-3. Epub 2009 Aug 6.
We developed positron emission tomography (PET)/computed tomography (CT) viewing software (PETviewer) that can display co-registered PET and CT images obtained by PET/CT and stored on picture archiving and communication systems (PACS). PETviewer has tools for presetting windows for CT display; control bars for PET window level; zoom, pan, and pseudo-color functions; and allows the user to draw a rectangular region of interest (ROI) for standardized uptake value (SUV) measurement. SUV was calculated using PET DICOM header information and the pixel intensity in PETviewer. Reconstructed datasets of PET/CT and maximum intensity projection (MIP) of the PET images were transferred and archived in PACS. Phantom experiments were performed to evaluate the validity of image fusion. PET/CT images were displayed on an independent window in PACS. Transaxial PET images were reformatted as sagittal and coronal PET images, which were displayed with the corresponding CT and PET/CT fusion images with adjustable color and transparency. Transaxial, sagittal, and coronal PET images corresponding to the location of the cursor were shown using cine display of MIP images. All images were displayed in PETviewer within 20 s on a personal computer for PACS, which was equipped with a P4, 1.3-GHz CPU, and 512 Mb of RAM. We could measure maximum and mean SUV in a ROI using PETviewer. Transaxial fused images of patients and phantoms showed excellent registration and fusion of PET and CT images in the X and Y directions. PETviewer provided very useful clinical tools for assessing PET/CT images on PACS and should assist in maximizing the benefits derived from PET/CT imaging.
我们开发了正电子发射断层扫描（PET）/计算机断层扫描（CT）查看软件（PETviewer），它可以显示通过PET/CT获取并存储在图像存档与通信系统（PACS）上的配准PET和CT图像。PETviewer具有用于预设CT显示窗口的工具；PET窗口水平的控制栏；缩放、平移和伪彩色功能；并允许用户绘制感兴趣的矩形区域（ROI）以进行标准化摄取值（SUV）测量。SUV是使用PET DICOM头部信息和PETviewer中的像素强度计算得出的。PET/CT的重建数据集和PET图像的最大强度投影（MIP）被传输并存档在PACS中。进行了体模实验以评估图像融合的有效性。PET/CT图像在PACS中的独立窗口上显示。将横轴PET图像重新格式化为矢状面和冠状面PET图像，它们与相应的CT和PET/CT融合图像一起显示，颜色和透明度可调。使用MIP图像的动态显示展示与光标位置对应的横轴、矢状面和冠状面PET图像。所有图像在配备P4、1.3 GHz CPU和512 Mb RAM的用于PACS的个人计算机上，20秒内在PETviewer中显示。我们可以使用PETviewer测量ROI中的最大和平均SUV。患者和体模的横轴融合图像在X和Y方向上显示出PET和CT图像的出色配准和融合。PETviewer为在PACS上评估PET/CT图像提供了非常有用的临床工具，应有助于最大限度地提高PET/CT成像的益处。
