VolparaDoseRT adds a new range of features to the VolparaDensity output.
VolparaDoseRT uses the volumetric quantitative data from VolparaDensity software to calculate patient-specific mean glandular dose (MGD) per image. This will differ from the dose reported by the x-ray system because VolparaDoseRT does not presume that the breast is half adipose and half glandular tissue, as the x-ray systems do.
VolparaDoseRT also calculates the amount of pressure applied to the breast during screening. These results are displayed on the secondary capture image, and the patient-specific dose and density results can also be integrated into patient letters for reporting (from the SC image or from a mammography CAD SR).
This is an example of a VolparaDoseRT secondary capture where the mean glandular dose was 2.3 mGy per image (shown in the lower left corner).
Mean Glandular Dose
Breast glandular tissue is sensitive to radiation, and absorbs more radiation than fatty tissue. Mammography unit manufacturers estimate density using calculations based on assumptions of a homogeneous mixture of fat and fibroglandular tissue in standard, non-personalized proportions. This results in dose being routinely under- or over-estimated. VolparaDoseRT uses patient-specific volumetric density results to calculate the dose and standardizes the way MGD is assessed across the different manufacturers’ mammography units, by using the same globally-accepted and validated algorithm.
Average Applied Pressure
Either excessive or insufficient pressure to the breast during screening will negatively impact image quality. VolparaDoseRT displays the applied pressure which is based on the compression force and contact area. By measuring the applied pressure, practices can monitor for improper compression from inexperienced technologists or mammography units with different automated breast compression settings. Corrective action can be taken quickly in order to to operate in an optimal range that improves patient experience, attendance rates, and image quality.
- Patient movement can blur image
- Dose exposure is increased
- Separation of overlapping tissue is poor
- Increased discomfort or pain for woman
- Severe paddle tilt reduces image quality
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