Wang Weiyuan, Ionita Ciprian, Kuhls-Gilcrist Andrew, Huang Ying, Qu Bin, Gupta Sandesh K, Bednarek Daniel R, Rudin Stephen
University at Buffalo (State University of New York), Toshiba Stroke Research Center, 3435 Main St., Buffalo, NY 14214, USA.
Proc SPIE Int Soc Opt Eng. 2011 Mar 16;7961:79614J-. doi: 10.1117/12.877588.
A new Graphical User Interface (GUI) was developed using Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW) for a high-resolution, high-sensitivity Solid State X-ray Image Intensifier (SSXII), which is a new x-ray detector for radiographic and fluoroscopic imaging, consisting of an array of Electron-Multiplying CCDs (EMCCDs) each having a variable on-chip electron-multiplication gain of up to 2000× to reduce the effect of readout noise. To enlarge the field-of-view (FOV), each EMCCD sensor is coupled to an x-ray phosphor through a fiberoptic taper. Two EMCCD camera modules are used in our prototype to form a computer-controlled array; however, larger arrays are under development. The new GUI provides patient registration, EMCCD module control, image acquisition, and patient image review. Images from the array are stitched into a 2k×1k pixel image that can be acquired and saved at a rate of 17 Hz (faster with pixel binning). When reviewing the patient's data, the operator can select images from the patient's directory tree listed by the GUI and cycle through the images using a slider bar. Commonly used camera parameters including exposure time, trigger mode, and individual EMCCD gain can be easily adjusted using the GUI. The GUI is designed to accommodate expansion of the EMCCD array to even larger FOVs with more modules. The high-resolution, high-sensitivity EMCCD modular-array SSXII imager with the new user-friendly GUI should enable angiographers and interventionalists to visualize smaller vessels and endovascular devices, helping them to make more accurate diagnoses and to perform more precise image-guided interventions.
利用实验室虚拟仪器工程工作台（LabVIEW）为高分辨率、高灵敏度的固态X射线图像增强器（SSXII）开发了一种新的图形用户界面（GUI）。SSXII是一种用于放射成像和荧光透视成像的新型X射线探测器，由一系列电子倍增电荷耦合器件（EMCCD）组成，每个器件具有高达2000倍的可变片上电子倍增增益，以降低读出噪声的影响。为了扩大视野（FOV），每个EMCCD传感器通过光纤锥与X射线磷光体耦合。我们的原型中使用了两个EMCCD相机模块来形成一个计算机控制的阵列；然而，更大的阵列正在开发中。新的GUI提供患者登记、EMCCD模块控制、图像采集和患者图像查看。来自阵列的图像被拼接成一个2k×1k像素的图像，该图像可以以17Hz的速率采集和保存（通过像素合并可更快）。在查看患者数据时，操作员可以从GUI列出的患者目录树中选择图像，并使用滑块浏览图像。常用的相机参数，包括曝光时间、触发模式和单个EMCCD增益，可以使用GUI轻松调整。GUI的设计旨在适应EMCCD阵列扩展到具有更多模块的更大视野。具有新型用户友好型GUI的高分辨率、高灵敏度EMCCD模块化阵列SSXII成像仪应能使血管造影师和介入医生可视化更小的血管和血管内装置，帮助他们做出更准确的诊断并进行更精确的图像引导干预。
