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MTF evaluation of a phosphor-coated CCD for x-ray imaging
M Gambaccini1, A Taibi, A Del Guerra
1Dipartimento di Fisica Università di Ferrara, Italy.
Physics in Medicine and Biology
|December 1, 1996
Summary
A new digital X-ray detector using a gadolinium oxysulphide scintillator achieved a high spatial resolution of 20 line pairs/mm. This advanced imaging system meets mammography
Area of Science:
- Medical Imaging
- Detector Physics
- Materials Science
Background:
- Digital X-ray imaging requires high spatial resolution for accurate diagnosis.
- Traditional detectors face limitations in achieving the necessary resolution for advanced applications like mammography.
- Charge-coupled device (CCD) technology offers potential for improved imaging performance.
Purpose of the Study:
- To develop and evaluate a novel digital X-ray detector with enhanced spatial resolution.
- To assess the performance of a direct deposition gadolinium oxysulphide scintillator on a CCD.
- To determine the feasibility of this system for mammographic imaging.
Main Methods:
- Assembly of a novel digital X-ray detector system.
- Direct deposition of a gadolinium oxysulphide scintillator onto a CCD.
- Measurement of the modulation transfer function (MTF) using the narrow slit technique.
- Evaluation of spatial resolution along digital coordinate axes.
Main Results:
- The developed imaging system achieved a spatial resolution limit of approximately 20 line pairs per millimeter (lp/mm).
- High resolution was consistently obtained in both digital coordinate directions.
- The detector demonstrated suitability for demanding mammographic imaging requirements.
Conclusions:
- The novel digital X-ray detector exhibits excellent spatial resolution.
- Direct scintillator deposition on CCDs is an effective method for high-resolution imaging.
- This system shows significant promise for advancing mammography and other high-resolution X-ray applications.