A theoretical method is presented that allows identification of optimal x-ray imaging geometry, considering the effects of x-ray source distribution, imaging task, x-ray scatter, and imager detective quantum efficiency (DQE). Each of these factors is incorporated into the ICRU-recommended figure of merit for image quality, the detectability index, which is maximized to determine the optimal sys...

How does it work? During a mammogram, a patient’s breast is placed on a flat support plate and compressed with a parallel plate called a paddle. An x-ray machine produces a small burst of x-rays that pass through the breast to a detector located on the opposite side. The detector can be either a photographic film plate, which captures the x-ray image on film, or a solid-state detector, which tr...

OBJECTIVE The aim of this study was to compare the image quality and radiation dose in chest imaging using an amorphous silicon flat-panel detector system and an amorphous selenium flat-panel detector system. In addition, the low-contrast performance of both systems with standard and low radiation doses was compared. MATERIALS AND METHODS In two groups of 100 patients each, digital chest radi...

Philips DigitalDiagnost, a digital radiographic system mounting flat panel detector (FPD), can display dose area data (DiDi dose) calculated by examination parameters. We evaluated its fundamental characteristics and compared the values of DiDi dose andactual measured data obtained by the area dose product meter (PD-4100L). Tendency of varied values of mAs, X-ray tube values and exposure area f...

Digital tomosynthesis is a radiographic technique that can produce an arbitrary number of section images of a patient from a single pass of the X-ray tube. It utilizes a conventional X-ray tube, a flat-panel detector, a computer-controlled tube mover, and special reconstruction algorithms to produce section images. While it does not have the depth resolution of computed tomography (CT), tomosyn...

Flat Panel Display (FPD) industry has achieved sufficient critical mass for its growth to explode. Thus, it can now attract the right blend of capital investments and R&D resources to drive technical innovation toward continuous improvement in view quality, manufacturing efficiency, and system integration. These in turn are sustaining consumer interest, penetration, revenue growth, and the pote...

In the last twenty years the Federal Institute for Materials Research and Testing (BAM) has developed several tomographs from high resolution computed tomography with synchrotron radiation at the Berlin Electron Storage Ring Company for Synchrotron Radiation (BESSY) in the energy range from 8 to 80 keV, over laboratory equipment using different kind of micro focus X-ray tubes (a 100 kV transmis...