Stationary digital breast tomosynthesis with distributed field emission X-ray tube

被引：15

作者：

Sprenger, F. ^{[1
]}

Calderon, X. ^{[2
]}

Gidcumb, E. ^{[2
]}

Lu, J. ^{[2
]}

Qian, X. ^{[2
]}

Spronk, D. ^{[1
]}

Tucker, A. ^{[2
]}

Yang, G. ^{[2
]}

Zhou, O. ^{[2
]}

机构：

[1] XinRay Syst LLC, Res Triangle Pk, NC USA

[2] Univ N Carolina, Chapel Hill, NC 27599 USA

来源：

MEDICAL IMAGING 2011: PHYSICS OF MEDICAL IMAGING | 2011年 / 7961卷

关键词：

tomosynthesis; field emission; CNT; distributed sources; x-ray; mammography; breast imaging;

D O I：

10.1117/12.878280

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Tomosynthesis requires projection images from different viewing angles. Using a distributed x-ray source this can be achieved without mechanical motion of the source with the potential for faster image acquisition speed. A distributed xray tube has been designed and manufactured specifically for breast tomosynthesis. The x-ray tube consists of 31 field emission x-ray sources with an angular range of 30 degrees. The total dose is up to 100mAs with an energy range between 27 and 45 kVp. We discuss the source geometry and results from the characterization of the first prototype. The x-ray tube uses field emission cathodes based on carbon nanotubes (CNT) as electron source. Prior to the manufacturing of the sealed x-ray tube extensive testing on the field emission cathodes has been performed to verify the requirements for commercial tomosynthesis systems in terms of emission current, focal spot size and tube lifetime.

引用

页数：6

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