High resolution amplified pixel sensor architectures for large area digital mammography tomosynthesis

Farhad Taghibakhsh; Karim S. Karim

doi:10.1117/12.769842

18 March 2008 High resolution amplified pixel sensor architectures for large area digital mammography tomosynthesis

Farhad Taghibakhsh, Karim S. Karim

Proceedings Volume 6913, Medical Imaging 2008: Physics of Medical Imaging; 69133R (2008) https://doi.org/10.1117/12.769842
Event: Medical Imaging, 2008, San Diego, California, United States

Abstract

Amplified Pixel Sensor (APS) architectures using two transistors per pixel are introduced in this research for digital mammography tomosynthesis that requires high resolution and low noise imaging capability. The fewer number of on-pixel elements and reduced pixel complexity result in a smaller pixel pitch and higher gain, which makes the two-transistor (2T) APS architectures promising for high resolution, low noise and high speed digital imaging including medical imaging modalities such as tomosynthesis and cone beam computed tomography. Measured results from in-house fabricated test arrays using amorphous silicon (a-Si) thin film transistor (TFTs) are presented as well as driving schemes for minimizing the threshold voltage metastability problem and increasing frame rate. The results indicate that a pixel input referred noise value of down to 220 electrons is achievable with a 50μm pixel pitch a-Si 2T APS.

Citation Download Citation

Farhad Taghibakhsh and Karim S. Karim "High resolution amplified pixel sensor architectures for large area digital mammography tomosynthesis", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69133R (18 March 2008); https://doi.org/10.1117/12.769842

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