CCD DETECTOR DEVELOPMENT FOR DIGITAL X-RAY MAMMOGRAPHY

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 7134
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Fischer Imaging Corpon
12300 North Grant Street, Denver, CO, 80241
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 DAVID E GUSTAFSON PHD
 (303) 452-6800
Business Contact
Phone: () -
Research Institution
N/A
Abstract
A HIGH-RESOLUTION SCANNED-PROJECTION RADIOGRAPHY SYSTEM IS PROPOSED FOR DIGITAL MAMMOGRAPHIC APPLICATIONS. BY USING A WIDE, DYNAMIC-RANGE CCD DETECTOR, SOME OF THE CURRENT LIMITATIONS ENCOUNTERED IN CONVENTIONAL FILM-SCREEN MAMMOGRAPHY CAN BE AVOIDED. ONE-DIMENSIONAL, FANBEAM GEOMETRY PROVIDES VERY GOOD SCATTERED X-RAY REDUCTION. A TIME-DELAY-AND-INTEGRATE (TDI) MODE OF CCD IMAGING WITH A 2,048X96 ELEMENT CCD ARRAY PROVIDES THE OPPORTUNITY TO IMAGEWITHOUT THE EXCESSIVE POWER-LOADING OF X-RAY TUBES THAT WOULD BE REQUIRED WITH A 2,048X1 ARRAY. BY UTILIZING TDI CHARGE INTEGRATION WHILE THE DETECTOR IS SCANNED, EACH PROJECTION THROUGH STATIONARY ANATOMY IS AVERAGED OVER 96 EXPOSURES, THEREBY PROVIDING A SIGNIFICANT SIGNAL-TO-QUANTUMMOTTLE IMPROVEMENT OF APPROXIMATELY 10:1 WHEN COMPARED TO A 2,048X1 DETECTOR AT THE EQUIVALENT TUBE LOADING. DEVELOPMENTAL TASKS TO BE PERFORMED INCLUDE CONSTRUCTION OF A TDI-CCD X-RAY DETECTOR IN WHICH THE LIGHT OUTPUT OF AN X-RAY-INTENSIFYING SCREEN IS COUPLED BY MEANS OF A LENS TO THE CCD FOCAL PLANE, MEASUREMENT OF X-RAY SENSITIVITY, ASSESSMENT OF NOISE CHARACTERISTICS AND HOMOGENEITY OF THE X-RAY DETECTOR CONSTRUCTION OF A MOVING-SAMPLE X-RAY IMAGING SYSTEM BASED ON THE TDI DETECTOR, AND DETERMINATION OF THE OPTIMUM X-RAY SPECTRUM FOR DIGITAL MAMMOGRAPHIC IMAGING TASKS TO EVALUATE ITS CLINICAL POTENTIAL.

* information listed above is at the time of submission.

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