Dynamic Contrast-Enhanced Digital Breast Tomosynthesis
Annual rept. 1 Mar 2011-29 Feb 2012
PENNSYLVANIA UNIV PHILADELPHIA
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Contrast-enhanced digital breast tomosynthesis CE-DBT is a novel x-ray imaging technique that produces a 3D representation of the breast vasculature via an intravenous contrast agent. CE-DBT offers a combination of excellent spatial resolution and accurate functional information, suggesting a strong potential role in disease prognostication. We are developing an innovative technique for obtaining dynamic contrast-enhanced DCE images with high spatial and temporal resolution. Our objective is to demonstrate, in proof-of-principle, that 4D DCE-DBT is technically feasible and that the derived data accurately measures vascular dynamics. Current contrast-enhanced DBT systems produces images at 2-3 fixed time points. Our proposed acquisition technique is capable of producing perfusion images at 30-60 time points for the same radiation dose. The method is compatible with both temporal and dual-energy subtraction methods. Reconstruction is performed using one full set of sequentially-acquired images however, unlike conventional DBT, the starting angle and hence measurement time point is arbitrary in our method. The resulting 4D data set consists of many time-resolved 3D functional measurements of tumor perfusion, offering the potential for superior lesion characterization and hence diagnostic accuracy.
- Medicine and Medical Research