In the phantom studies the 1st generation s‐DBT system has demonstrated 30% higher spatial resolution than the corresponding continuous motion DBT systems. The system is currently being evaluated for its diagnostic performance in 100 patient clinical evaluation against FFDM. Initial results indicate that the s‐DBT system can produce increased lesion conspicuity and comparable MC visibility. However due to x‐ray flux limitations, certain large size patients have to be excluded. Recent studies have shown that increasing the angular span beyond 30° can be beneficial for enhanced depth resolution. We report the preliminary characterization of the 2nd generation s-DBT system with a new CNT x-ray source array, increased tube flux and a larger angular span. Increasing x‐ray tube flux allows for a larger patient population and dual energy imaging. Results indicate that the system delivers more than twice the flux, allowing for imaging of all size patients with acquisition time of 2‐4 seconds. A 7° increase in angular span over 1st generation decreased the ASF by 37%. Additionally, the 2nd generation s‐DBT system utilizing a specific AFVR reconstruction method resulted in a 92% increase in the in plane resolution over CM DBT system, and a 37% increase in spatial resolution over the 1st generation s-‐DBT system.
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Jabari Calliste, Gongting Wu, Philip E. Laganis, Derrek Spronk, Houman Jafari, Kyle Olson, Bo Gao, Yueh Z. Lee, Otto Zhou, Jianping Lu, "A new generation of stationary digital breast tomosynthesis system with wider angular span and faster scanning time," Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 978304 (22 March 2016);