Limited angle dual modality breast imaging

We are developing a dual modality breast scanner that can obtain X-ray transmission and gamma ray emission images in succession at multiple viewing angles with the breast held under mild compression. These views are then reconstructed and fused to obtain three-dimensional images that combine structural and functional information. Here we describe the dual modality system and present results of phantom experiments designed to test the system´s ability to obtain volumetric dual modality data sets from a limited number of projections, acquired over a limited (less than 180 degrees) angular range.