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14 September 1993 Digital x-ray cameras for real-time stereotactic breast needle biopsy
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hans Roehrig, Laurie L. Fajardo M.D., and Tong Yu "Digital x-ray cameras for real-time stereotactic breast needle biopsy", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993);

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