Accession Number:

ADA277543

Title:

Clinical Evaluation of a Digital Mammography Based on Micro-Lithography (Breast Cancer)

Descriptive Note:

Annual rept. 1 Dec 1992-1 Dec 1993

Corporate Author:

GEORGETOWN UNIV WASHINGTON DC

Personal Author(s):

Report Date:

1994-01-20

Pagination or Media Count:

25.0

Abstract:

A prototype digital x-ray imaging under development by 3M consists of a x-ray detector and an image reader. The x-ray detector is a thick-layer armorphous selenimum and insulation layer device that stores the x-ray latent image as a charge distribution at the selenimuminsulatro interface. The reader is a canning device that uses a pulsed HeCd laser 441 nm to read the latent x- ray image stored in the detector. The image reading laser pulse releases the latent image charge from the interface. The released charge is detected, digitised, and stored by the image reader. Clinical quality images can be obtained at x-ray exposures that are comparable to those used for state of the art film screen systems. The resolution of the image pixel size and pixel spacing is determined by the size and placement of the image reading laser. The prototype is routinely operated at resolutions from 50 micron to 170 micron. The performance of the device compares well with theoretical results. Initial results show linear x-ray signal response to x-ray dose for low exposures, and a large dynamic range. Currently final engineering testing is underway so that a prototype system can be shipped to Georgetown for clinical installation. Breast Cancer, Mammography, Digital, RAD VI.

Subject Categories:

  • Medicine and Medical Research
  • Pharmacology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE