Related Experiment Video
Updated: Jun 13, 2026
05:28
Clinical Imaging of Microwave Mammography
Published on: November 14, 2025
Using a NPWE model observer to assess suitable image quality for a digital mammography quality assurance programme
P Monnin1, F O Bochud, F R Verdun
1Institute for Radiation Physics IRA, CHUV - UNIL, Grand Pré 1, 1007 Lausanne, Switzerland. pascal.monnin@chuv.ch
Radiation Protection Dosimetry
|April 17, 2010
Summary
A new objective method assesses digital mammography imaging performance by evaluating microcalcification visibility. This approach uses spatial resolution and noise power spectra to define minimal image quality, potentially simplifying current tests.
Area of Science:
- Radiology
- Medical Imaging
- Quality Assurance
Background:
- Digital mammography requires robust quality assurance programs.
- Objective performance metrics are needed for digital systems.
- Current methods like CDMAM may be complex to implement.
Purpose of the Study:
- To develop an objective method for evaluating mammography imaging performance.
- To assess the visibility of 0.2 mm microcalcifications in digital mammography.
- To establish a new standard for mammography quality assurance.
Main Methods:
- Utilized a quasi-ideal observer model to assess microcalcification visibility.
- Measured spatial resolution via modulation transfer function and noise power spectra.
- Determined contrast using an aluminum sheet and PMMA blocks, defining minimal quality by a contrast-to-noise ratio (CNR) of 5.4.
Main Results:
- The developed method provides an objective measure of image quality for digital mammography.
- Evaluations on computed radiography (CR) and digital radiography (DR) systems were successful.
- The method establishes a threshold CNR for minimum acceptable image quality regarding microcalcification visibility.
Conclusions:
- The new objective method offers a reliable way to evaluate digital mammography systems.
- This approach can potentially replace existing methods like CDMAM.
- It simplifies the threshold contrast visibility test, enhancing mammography quality assurance.
