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Proceedings Paper

Digital x-ray cameras for real-time stereotactic breast needle biopsy
Author(s): Hans Roehrig; Laurie L. Fajardo; Tong Yu
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Paper Abstract

This paper describes experiments performed to determine image quality of three x-ray imaging systems designed for stereotactic breast needle biopsy: A system developed in-house, a LoRad DSM and a Fischer MammoVision. All systems have been successfully used to perform stereotactic breast needle biopsies and preoperative needle localizations. They all successfully decrease the time for stereotactic needle biopsy procedures. The systems are being characterized with respect to image quality for a variety of mammographic x-ray screens. The sensitivity can be as high as 96 ADU/mR and as low as 28 ADU/mR, depending on the phosphor screen and the gain used. The response is linear with respect to x-ray exposure. The highest spatial resolution found was on the order of 10 lp/mm, which is the Nyquist frequency for systems with 1024 pixels at a linear field of 5 cm. The noise at zero spatial frequency was found to be mainly determined by x-ray photon noise.

Paper Details

Date Published: 14 September 1993
PDF: 12 pages
Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154593
Show Author Affiliations
Hans Roehrig, Univ. of Arizona (United States)
Laurie L. Fajardo, Univ. of Arizona (United States)
Tong Yu, Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 1896:
Medical Imaging 1993: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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