Seventh-generation CT

G. M. Besson

doi:10.1117/12.2214319

31 March 2016 Seventh-generation CT

G. M. Besson

Proceedings Volume 9783, Medical Imaging 2016: Physics of Medical Imaging; 978350 (2016) https://doi.org/10.1117/12.2214319
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

A new dual-drum CT system architecture has been recently introduced with the potential to achieve significantly higher temporal resolution than is currently possible in medical imaging CT. The concept relies only on known technologies; in particular rotation speeds several times higher than what is possible today could be achieved leveraging typical x-ray tube designs and capabilities. However, the architecture lends itself to the development of a new arrangement of x-ray sources in a toroidal vacuum envelope containing a rotating cathode ring and a (optionally rotating) shared anode ring to potentially obtain increased individual beam power as well as increase total exposure per rotation. The new x-ray source sub-system design builds on previously described concepts and could make the provision of multiple conventional high-power cathodes in a CT system practical by distributing the anode target between the cathodes. In particular, relying on known magnetic-levitation technologies, it is in principle possible to more than double the relative speed of the electron-beam with respect to the target, thus potentially leading to significant individual beam power increases as compared to today’s state-of-the-art. In one embodiment, the proposed design can be naturally leveraged by the dual-drum CT concept previously described to alleviate the problem of arranging a number of conventional rotating anode-stem x-ray tubes and power conditioners on the limited space of a CT gantry. In another embodiment, a system with three cathodes is suggested leveraging the architecture previously proposed by Franke.

Citation Download Citation

G. M. Besson "Seventh-generation CT", Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 978350 (31 March 2016); https://doi.org/10.1117/12.2214319

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KEYWORDS

Sensors

X-rays

X-ray computed tomography

X-ray sources

Imaging systems

Temporal resolution

Magnetism

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