Medipix2 based CdTe microprobe for dental imaging
Medipix2 based CdTe microprobe for dental imaging
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DOI：
10.1088/1748-0221/6/12/c12002
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发表时间：
2011-12
影响因子：
1.3
通讯作者：
Z. Vykydal;A. Fauler;M. Fiederle;J. Jakubek;M. Svestkova;A. Zwerger
中科院分区：
文献类型：
--
作者：
Z. Vykydal;A. Fauler;M. Fiederle;J. Jakubek;M. Svestkova;A. Zwerger
医学成像设备和技术需要提供样本或患者的高分辨率和低剂量图像。混合半导体单光子计数设备与合适的传感器材料和先进的图像重建技术一起满足这些要求。在特定情况下，例如直接观察牙科植入物，成像设备本身的尺寸也起着关键作用。本研究比较了由标准商业牙科成像系统（Gendex 765DC X射线管和VisualiX闪烁探测器）和两个Medipix 2 USB Lite探测器（一个配备Si传感器（300 μm厚），一个配备CdTe传感器（1 mm厚））提供的牙齿2D X射线照片。Medipix 2设备的单光子计数能力允许几乎无限的图像动态范围，从而显著提高对比度。整个USB Lite设备的尺寸仅为15 mm × 60 mm，其中25%由敏感区域组成。这种紧凑型探测器可直接在患者口腔内使用。
Medical imaging devices and techniques are demanded to provide high resolution and low dose images of samples or patients. Hybrid semiconductor single photon counting devices together with suitable sensor materials and advanced techniques of image reconstruction fulfil these requirements. In particular cases such as the direct observation of dental implants also the size of the imaging device itself plays a critical role. This work presents the comparison of 2D radiographs of tooth provided by a standard commercial dental imaging system (Gendex 765DC X-ray tube with VisualiX scintillation detector) and two Medipix2 USB Lite detectors one equipped with a Si sensor (300 μm thick) and one with a CdTe sensor (1 mm thick). Single photon counting capability of the Medipix2 device allows virtually unlimited dynamic range of the images and thus increases the contrast significantly. The dimensions of the whole USB Lite device are only 15 mm × 60 mm of which 25% consists of the sensitive area. Detector of this compact size can be used directly inside the patients' mouth.