System considerations in CCD-based x-ray imaging for digital chest radiography and digital mammography

System modeling is used to investigate the effect of various system parameters on the image quality in CCD-based x-ray imaging systems. The systems considered consist of a typical phosphor-based scintillating screen coupled to a CCD through lens or fiberoptic taper. Two applications, chest radiograp...

Full description

Saved in:
Bibliographic Details
Published in:Medical physics (Lancaster) 1997-02, Vol.24 (2), p.287-297
Main Authors: Hejazi, Shahram, Trauernicht, David P.
Format: Article
Language:English
Subjects:
87.56.01.a
87.56.04
biomedical equipment
Biophysical Phenomena
Biophysics
CCD image sensors
Charge coupled devices
diagnostic radiography
Digital mammography
Digital radiography
Mammography
Mammography - methods
Medical image quality
Medical imaging
Medical X‐ray imaging
modelling
Models, Theoretical
Non‐ionizing radiation equipment and techniques
Radiographic Image Enhancement
Radiography
Radiography, Thoracic - methods
systems analysis
Technology, Radiologic
X-Rays
X‐ray effects
X‐ray imaging
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:System modeling is used to investigate the effect of various system parameters on the image quality in CCD-based x-ray imaging systems. The systems considered consist of a typical phosphor-based scintillating screen coupled to a CCD through lens or fiberoptic taper. Two applications, chest radiography and mammography, are analyzed. For each application typical system characteristics and operating conditions are used to determine the detective quantum efficiency (DQE) as a function of spatial frequency, optical collection efficiency, optical demagnification factor, and electronic noise. The DQE is modeled by extending the analysis for storage phosphor systems. The calculations are done for typical exposure conditions (0.25 mR for chest and 10.0 mR for mammography); however, the exposure effects are also discussed. It was found that a reasonable DQE can be obtained for both applications through each coupling approach; however, the demagnification requirements and electronic noise limitations are more stringent for the digital mammography application.
ISSN:0094-2405
2473-4209
DOI:10.1118/1.598072