The ability to generate patient specific mammographic dose using volumetric breast density data from 2D mammography and 3D tomosynthesis is among the research presented this week at the 12th
The patient-specific dose research is one of multiple abstracts that highlight the use of quantitative breast imaging software tools to provide Enterprise-wide breast care imaging and informatics, including volumetric density, patient-specific dose, and applied pressure.
In the study, "Patient Specific Dose Calculation using Volumetric Breast Density for Mammography and Tomosynthesis," researchers demonstrated how to calculate a patient-specific mean glandular dose (MGD) which personalizes dose to the individual woman using her volumetric breast density, rather than assuming a certain breast density, or one that is estimated solely from compressed breast thickness. Patient-specific MGD values were generated using Volpara volumetric breast density measurement software to estimate the glandularity, or percentage of the breast that contains glandular tissue, of each breast from the mammogram, and the MGD calculation method presented by Dance et al. Researchers compared the values calculated using VolparaDensity with those reported by the manufacturer for a database of 403 2D mammograms.
While agreement is good for dense breasts, results demonstrated that the MGD is underestimated in fatty breasts. Results for 91 2D projection images and 3D tomosynthesis acquisitions in "combo" mode were also compared. In general, the MGDs are approximately equal; however, when split into density categories, it becomes apparent that breasts exhibited significantly different doses, with tomosynthesis MGDs being higher than mammogram MGDs for fattier cases.
"The results of this study reinforce that volumetric breast density supports the ability to calculate personalized MGD estimates using the patient specific glandularity. Manufacturer reported MGD estimates appeared to underestimate dose in the case of fatty, or low density, breasts in comparison to our calculations, but gave good agreement in the case of dense breasts," said
With growing emphasis on dose in medical imaging as a result of the Image Wisely initiative, it is reasonable to expect dose monitoring to expand to include mammography. The Size Specific Dose Estimation (SSDE) for CT was created by an
VolparaDose is vendor-neutral and uses patient-specific quantitative data to generate a more accurate assessment of the MGD per image. Research shows that it is possible to improve the accuracy and personalization of radiation dose estimation, which can allow you to identify safety issues, and keep your patients better informed.
"The breast is among the organs most sensitive to radiation, and it is therefore essential to keep x-ray mean glandular dose as low as possible, while achieving as diagnostically useful an image as possible, for fear of inducing cancers during mammography and/or tomosynthesis screening," added Dr. Highnam. "The introduction of breast tomosynthesis and of shorter screening intervals for high-risk women potentially increase patients' exposure to radiation dose, which has renewed interest in the accurate MGD calculation, tracking, and accountability on an individual patient basis."
Cleared by the
About Volpara Solutions
Founded to enable radiologists to give women the most accurate information possible regarding their breast health, Volpara Solutions is the wholly owned sales and marketing arm of
Read the full story at http://www.prweb.com/releases/2014/07/prweb11987148.htm
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