Optimizing full-field digital mammography techniques: The influence of target-filter and peak voltage settings on lesion Detection and average glandular dose
The goal of this study was to assess the influence of the target-filter combination and the tube voltage on lesion detection and average glandular dose (AGD) in digital mammography using a flat-panel X-ray detector based on amorphous silicon technology. For the assessment of image quality images of the ACR mammographic accreditation phantom were obtained. Increasing peak voltage by 2 kVp decreases breast dose by 7% for the same target-filter combination. Changing the target-filter combination from Mo-Mo to Mo-Rh decreases AGD by approximately 10% and changing from Mo-Mo to Rh-Rh decreases the AGD by approximately 30% at the same peak voltage values. In the peak voltage range between 25 and 35 kVp there was no difference in lesion detectability for different tube voltages at the same detector dose between Mo-Mo and Mo-Rh.
KeywordsFiltration Attenuation Iodid Molybdenum Cesium
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