A stationary digital breast tomosynthesis scanner

Xin Qian; Andrew Tucker; Emily Gidcumb; Jianping Lu; Otto Zhou; Derrek Spronk; Frank Sprenger; Yiheng Zhang; Don Kennedy; Tom Farbizio; Zhenxue Jing

doi:10.1117/12.911540

9 March 2012 A stationary digital breast tomosynthesis scanner

Xin Qian, Andrew Tucker, Emily Gidcumb, Jianping Lu, Otto Zhou, Derrek Spronk, Frank Sprenger, Yiheng Zhang, Don Kennedy, Tom Farbizio, Zhenxue Jing

Author Affiliations +

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 831352 (2012) https://doi.org/10.1117/12.911540
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

Abstract

A prototype stationary digital breast tomosynthesis (s-DBT) system has been developed by retrofitting a Hologic Selenia Dimension rotating gantry tomosynthesis scanner with a spatially distributed carbon nanotube (CNT) x-ray source array. The goal is to improve the system spatial resolution by removing the x-ray tube motion induced focal spot blurring. The CNT x-ray source array comprises 31 individually addressable x-ray beams covering 30° angular span. Each x-ray beam has a minimum focal spot size of 0.64×0.61mm (full-width-at-half-maximum), a stationary W anode operating up to 50kVp, and 1mm thick Al filter. The flux from each beam is regulated and varied using dedicated control electronics. The maximum tube current is determined by the heat load of the stationary anode and depends on the energy, pulse width and the focal spot size used. Stable operation at 28kVp, 27mA tube current, 250msec pulse width and 38mA tube current, 183msec pulse width per exposure was achieved with extended lifetime. The standard ACR phantom was imaged and analyzed to evaluate the image quality. The actual scanning speed depends on the number of views and the readout time of the x-ray detector. With the present detector, 6 second scanning time at either 15 views or 31 views can be achieved at 100mAs total imaging dose with a detector readout time of 240msec.

Citation Download Citation

Xin Qian, Andrew Tucker, Emily Gidcumb, Jianping Lu, Otto Zhou, Derrek Spronk, Frank Sprenger, Yiheng Zhang, Don Kennedy, Tom Farbizio, and Zhenxue Jing "A stationary digital breast tomosynthesis scanner", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 831352 (9 March 2012); https://doi.org/10.1117/12.911540

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