As a new three-dimensional breast imaging technique, breast tomosynthesis allows the reconstruction of an arbitrary set of planes in the breast from a limited-angle series of x-ray projection images. The breast tomosynthesis technique has been demonstrated as promising to improve early breast cancer detection. This paper represents a preliminary phantom study and computer simulation results of ...

Geometry and physics of absorption imaging impose certain constraints on X-ray projections. Recently, the Epipolar Consistency Conditions (ECC) have been introduced and applied to motion correction in flat-detector computed tomography (CT). They are based on redundant information in transmission images along epipolar lines. Unlike other consistency conditions for CT scans, they act directly on ...

This paper describes the development and initial cadaver studies using a prototype image-guided surgery system for femoroplasty, which is a potential alternative treatment for reducing fracture risk in patients with severe osteoporosis. Our goal is to develop an integrated surgical guidance system that will allow surgeons to augment the femur using patient-specific biomechanical planning and in...

Radio-frequency catheter ablation (RFCA) has become an accepted treatment option for atrial fibrillation (Afib). RFCA of Afib involves isolation of the pulmonary veins under X-ray guidance. For easier navigation, two-dimensional X-ray imaging may take advantage of overlay images derived from static pre-operative 3-D data set to add anatomical details which, otherwise, would not be visible under...

ABSTRACT X-ray images of galaxy clusters often show disturbed structures that are indications cluster mergers. To complement our previous work on the dynamical state 964 observed by Chandra, we process for 1308 from XMM–Newton archival data, together with 22 newly released and evaluate their these images. The concentration index c, centroid shift ? power ratio P3/P0 calculated in circular regio...

We present deep ROSAT X-ray images of the double nucleus galaxy Mrk 266 in combination with optical images and spectra. The High Resolution Imager (HRI) X-ray morphology can be divided into four components: two nuclei of the merging galaxies, a diffuse galactic component and a strong northern jet coincident with very strong optical line emission. This jet component is decoupled from the rest of...

There is considerable current interest in deriving accurate dimensional measurements of the internal ge ometry of complex manufactured parts particularly castings This paper describes an approach to the re construction of D part geometry from multiple dig ital X ray images A novel method for radiographic stereo is described which takes into account the spe cial imaging geometry of the digital X...