A parametric method for determining mammographic X-ray tube output and half value layer

Area of Science:

• Medical Physics
• Radiological Sciences
• Health Quality Assurance

Background:

• Accurate mean glandular dose assessment is crucial for quality assurance in breast screening programs.
• Variations in X-ray tube voltage and programmable exposure modes necessitate extensive measurements for dose calculations.
• Existing methods require numerous measurements to obtain necessary data for dose calculations.

Purpose of the Study:

• To develop a computer model for predicting X-ray tube output and half-value layer.
• To simplify the calculation of dosimetry data for mammography quality assurance.
• To provide easily incorporable data for dose calculation spreadsheets.

Main Methods:

• Utilized a computer model to generate data for tube output and half-value layer.
• Derived data from measurements routinely obtained during quality assurance tests.
• Presented data as equations and parameters for spreadsheet integration.

Main Results:

• The computer model successfully produced data for calculating tube output and half-value layer.
• Experimental verification showed good agreement between measured and predicted values.
• The model is effective across various target, filter, and tube voltage combinations.

Conclusions:

• The developed computer model aids in calculating essential dosimetry parameters for mammography.
• This approach streamlines quality assurance by reducing the need for extensive measurements.
• The model facilitates accurate mean glandular dose calculations in breast screening programs.