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1 March 2019 Flat panel design and performance of a new a-Si mammography imaging system
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Abstract
Mammography systems demand high quality imaging at reduced acquisition times. The Varex 3024MX imager was designed specifically with the demands of mammographic imaging in mind: high spatial resolution, excellent low contrast resolution as well as excellent low dose performance, and acquisition speeds capable of tomography. This paper will describe the details of the next generation a-Si mammography sensor array and contrast the predicate product, PS3024M. The Varex 3024MX imager delivers a 3584x2816 matrix with a pixel pitch of 83um resulting in an active area of 297.5mm x 233.7mm., optimized for mammography applications. A 250um thick deposited columnar CsI(Tl) layer is used as the scintillator. The development of a new pixel architecture and charge amplifier ASIC allows for faster readout of the sensor array at 16 bit pixel depth. The faster readout of the Varex 3024MX enables readout speeds up to 10fps. In addition to the faster frame rates, the combination of the new pixel architecture and ASIC, result in a very low electronic noise floor and improved ghosting behavior. The results, as outlined below, will show that the 3024MX design targeted improvements to detective quantum efficiency (DQE), maximum linear dose (MLD), quantum-limited dose (QLD), ghosting, and image readout time.
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Steve Wettstein, Carlo Tognina, and Isaias D. Job "Flat panel design and performance of a new a-Si mammography imaging system", Proc. SPIE 10948, Medical Imaging 2019: Physics of Medical Imaging, 109483F (1 March 2019); https://doi.org/10.1117/12.2513473
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