Optimization of a high-resolution real-time solid state x-ray detection system for mammography

Sylvie Chapuy; Zlatko Dimcovski; Jean-Sebastien Graulich; Nicolas Rabiller; Mimoza Ristova

doi:10.1117/12.505663

30 December 2003 Optimization of a high-resolution real-time solid state x-ray detection system for mammography

Sylvie Chapuy, Zlatko Dimcovski, Jean-Sebastien Graulich, Nicolas Rabiller, Mimoza Ristova

Proceedings Volume 5199, Penetrating Radiation Systems and Applications V; (2003) https://doi.org/10.1117/12.505663
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

In this study we present Vista-Mamma 50, a novel detection system for high resolution real-time digital mammography. A matrix sensor (12 cm x 12 cm) consists of a high luminance CsI:Tl crystal grown with columnar structure on the top of a pin photodiode matrix driven by CMOS transistors. This imaging technology is known to allow achievement of a pixel size as small as 50 μm or less with a fill factor of the sensitive area of about 80%. The sensor is equipped with a fast real-time electronic system for readout and digitization of images with a dynamic range of 12 bits. Images can be obtained at a frame rate as high as 9 images per second in a 4 x 4 binning operation mode. Appropriate computerized control tools, real-time image treatment, data representation and off-line analysis have been developed. On-line image processing is automatically applied to each frame, including offset and gain corrections and masking of defective pixels. Quantitative measurements including dose response, modulation transfer function (MTF) and detective quantum efficiency are presented. It was found that the detector response shows linear dependence on the entrance dose. The results from the MTF showed that a resolution of equal to or greater than 8 lp/mm could be achieved. The high value of the DQE obtained could be ascribed to the large fill factor. The high resolution detector that we present is well adapted to the image quality which is required by the standards for applications in mammography. Some preliminary results have been obtained for microcalcifications performed on equivalent breast phantoms. Clinical tests are in progress.

Citation Download Citation

Sylvie Chapuy, Zlatko Dimcovski, Jean-Sebastien Graulich, Nicolas Rabiller, and Mimoza Ristova "Optimization of a high-resolution real-time solid state x-ray detection system for mammography", Proc. SPIE 5199, Penetrating Radiation Systems and Applications V, (30 December 2003); https://doi.org/10.1117/12.505663

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available