Results for: tomosynthesis
A 3D animation depicting an experimental breast cancer detection technique. Based on CT technology, this technology allows for the creation of 'movies' that provide information about breast structures, both normal abnormal.
In Dec 2009, Duke was 1st US site to receive the Siemens MAMMOMAT Inspiration which is a combined full-field digital mammography and breast tomosynthesis system. This investigational system has not yet received FDA approval. Outside the US, this system received the CE mark and is commercially available as of Nov 2009. This video shows the system during physics acceptance testing at Duke. The x-ray tube fires a pre-shot for exposure estimation, then tilts the tube head to the left to begin the 45 degree sweep during which 25 low-dose projection shots are fired at a rate of about one per second. The tube head then re-centers and the compression paddle is lifted. The projection images are then reconstructed to yield a pseudo-3D volumetric data set of the breast. Uploaded by Joseph Lo PhD, principal investigator of research project. All rights reserved by Joseph Lo, Duke University Dept of Radiology and Siemens Healthcare.
The DBT system employs a digital X-ray that records a series of low-dose, high-resolution images of the breast while traversing a small (15°) arc around the compressed breast. As the projection angle changes, images are recorded at slightly different depths and thicknesses, from one surface of the breast to the other. The compression time of approximately four seconds needed for DBT is similar to that used for standard two-dimensional digital mammography. Following the procedure, reconstruction algorithms are used to create a 3-D rendering of the interior breast architecture.
This rendering is presented to the breast imager as a stack of images of the breast that, in total, represent the area from one skin surface to the other. Each DBT image can be magnified or manipulated to better reveal minute detail. These processes can reduce the superimposition of overlapping tissue shadows seen in two-dimensional mammograms, allowing more accurate interpretations of breast changes.