Sharma P, Swetadri Vasan S N, Titus A H, Cartwright A N, Bednarek D R, Rudin S
Electrical Engineering Department and Toshiba Stroke Research Center at University at Buffalo, The State University of New York, Buffalo, NY 14260-1920, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:5979-82. doi: 10.1109/EMBC.2012.6347356.
We describe and demonstrate for the first time the use of the novel Multiple Module Multiplexer (MMMIC) for a 2×2 array of new electron multiplying charge coupled device (EMCCD) based x-ray detectors. It is highly desirable for x-ray imaging systems to have larger fields of view (FOV) extensible in two directions yet to still be capable of doing high resolution imaging over regions-of-interest (ROI). The MMMIC achieves these goals by acquiring and multiplexing data from an array of imaging modules thereby enabling a larger FOV, and at the same time allowing high resolution ROI imaging through selection of a subset of modules in the array. MMMIC also supports different binning modes. This paper describes how a specific two stage configuration connecting three identical MMMICs is used to acquire and multiplex data from a 2×2 array of EMCCD based detectors. The first stage contains two MMMICs wherein each MMMIC is getting data from two EMCCD detectors. The multiplexed data from these MMMICs is then forwarded to the second stage MMMIC in the similar fashion. The second stage that has only one MMMIC gives the final 12 bit multiplexed data from four modules. This data is then sent over a high speed Camera Link interface to the image processing computer. X-ray images taken through the 2×2 array of EMCCD based detectors using this two stage configuration of MMMICs are shown successfully demonstrating the concept.
我们首次描述并展示了新型多模块多路复用器（MMMIC）在基于新型电子倍增电荷耦合器件（EMCCD）的2×2阵列X射线探测器中的应用。对于X射线成像系统而言，非常希望能够在两个方向上扩展更大的视场（FOV），同时仍能够在感兴趣区域（ROI）上进行高分辨率成像。MMMIC通过采集和复用来自成像模块阵列的数据来实现这些目标，从而实现更大的视场，同时通过选择阵列中的模块子集来实现高分辨率ROI成像。MMMIC还支持不同的合并模式。本文描述了如何使用连接三个相同MMMIC的特定两级配置来采集和复用来自基于EMCCD的2×2探测器阵列的数据。第一级包含两个MMMIC，其中每个MMMIC从两个EMCCD探测器获取数据。然后，来自这些MMMIC的复用数据以类似的方式转发到第二级MMMIC。只有一个MMMIC的第二级给出来自四个模块的最终12位复用数据。然后，该数据通过高速相机链路接口发送到图像处理计算机。展示了使用这种MMMIC两级配置通过基于EMCCD的2×2探测器阵列拍摄的X射线图像，成功验证了这一概念。
