Novel large-area MIS-type x-ray image sensor for digital radiography

Novel large-area MIS-type x-ray image sensor for digital radiography
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用于数字射线照相的新型大面积 MIS 型 X 射线图像传感器

DOI:
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发表时间:
1998
期刊:
Medical Imaging
影响因子:
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通讯作者:
T. Yamazaki
T. Yamazaki
中科院分区:
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文献类型:
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作者:
T. Kameshima;N. Kaifu;Eiichi Takami;M. Morishita;T. Yamazaki

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我们已经开发了一种全新的,大面积的x射线图像传感器,用于数字射线照相系统(DRS)。该传感器采用由氢化非晶硅(a- si:H)制成的薄膜晶体管(TFT)/金属绝缘体半导体(MIS)型光电转换器阵列。该传感器具有2688 X 2688像素,间距为160微米。活动区域为17英寸× 17英寸。传感器利用与阵列耦合的闪烁体。由x射线产生的光由mis型光电转换器检测,并通过切换tft扫描出所产生的信号。a-Si TFT/ mis型光电变换器阵列具有信噪比高、制作工艺简单等特点。我们将描述传感器的原理和性能。此外,我们将展示用该传感器获得的人体受试者的一些x射线图像。传感器的动态范围覆盖了射线照相的大部分曝光范围。信噪比几乎只受x射线光子噪声的限制。MTF对于胸片数字摄影是足够的。x射线图像对比度好。实验结果和获得的图像表明,全新的传感器在替代x射线胶片方面具有很大的优势。该传感器制作工艺简单,生产效率高,成本低。
We have developed a brand new, large-area X-ray image sensor for Digital Radiography System (DRS). The sensor utilizes a thin film transistor (TFT)/metal insulator semiconductor (MIS)-type photoelectric converter array made from hydrogenated amorphous silicon (a-Si:H). The sensor has 2688 X 2688 pixels at a pitch of 160 micrometer. The active area is 17 inch X 17 inch. The sensor utilizes scintillator coupled to the array. The light generated by X-rays is detected by the MIS-type photoelectric converters, and the resultant signals are scanned out by switching the TFTs. The a-Si TFT/MIS-type photoelectric converter array is characterized by high signal to noise ratio (SNR) and simple fabrication process. We will describe the principle and the performance of the sensor. In addition, we will present some X-ray images of a human subject obtained with this sensor. Dynamic range of the sensor covers most of the exposure range for radiography. SNR is limited almost only by the X-ray photon noise. MTF is sufficient for digital chest radiography. X-ray images have good contrast. The experimental results and obtained images show that the brand new sensor has great advantages for replacing X-ray film. The simple fabrication process of the sensor promises high productivity and low cost of DRS.
对用于荧光镜和射线照相操作的高分辨率、间接检测、有源矩阵平板成像仪 (AMFPI) 的信号性能进行实证研究。
DOI: 10.1118/1.597918
发表时间: 1997
期刊: Medical physics
影响因子: 3.8
作者:
Antonuk,LE;El-Mohri,Y;Siewerdsen,JH;Yorkston,J;Huang,W;Scarpine,VE;Street,RA
通讯作者: Street,RA
细微肺部异常的数字放射成像:像素大小对观察者性能影响的 ROC 研究。
DOI: 10.1148/radiology.158.1.3940383
发表时间: 1986
期刊: Radiology
影响因子: 19.7
作者:
MacMahon,H;Vyborny,CJ;Metz,CE;Doi,K;Sabeti,V;Solomon,SL
通讯作者: Solomon,SL
DOI: 10.1118/1.597919
发表时间: 1997-01-01
期刊: MEDICAL PHYSICS
影响因子: 3.8
作者:
Siewerdsen, JH;Antonuk, LE;Cunningham, IA
通讯作者: Cunningham, IA