Digital radiographic imaging systems, such as those using photostimulable storage phosphor, amorphous selenium, amorphous silicon, CCD, and MOSFET technology, can produce adequate image quality over a much broader range of exposure levels than that of screen/film imaging systems. In screen/film imaging, the final image brightness and contrast are indicative of over- and underexposure. In digita...

OBJECTIVE To evaluate the efficacy for spatial resolution and radiation dose of a small-field digital mammographic imaging system using parabolic polycapillary optics. MATERIALS AND METHODS We developed a small-field digital mammographic imaging system composed of a CCD (charge coupled device) detector and an X-ray source coupled with parabolic polycapillary optics. The spatial resolution and...

In this study we focus on understanding the system imaging mechanisms given rise to the unique characteristic of discretization in digital holography. Imaging analysis with respect to the system geometries is investigated and the corresponding requirements for reliable holographic imaging are specified. In addition, the imaging capacity of a digital holographic system is analyzed in terms of sp...

The market for digital cameras has exploded over the last few years. Including cameras fitted in devices such as mobile phones, digital cameras have become the fastest selling consumer electronic device in history. This growth in digital sales has been matched by a decline in the sales of traditional analogue cameras to the extent where Kodak has announced its decision to stop selling these pro...

Digital coronary angiography: the new gold standard? Few, if any, other areas of imaging require the high spatial, temporal, and contrast resolutions that are needed for coronary arteriography. For two decades 35 mm cine-angiography has fulfilled these requirements and has been regarded as the "gold standard" for the investigation of coronary artery disease; but despite its many advantages cine...

OBJECTIVE To compare off-the-shelf digital imaging equipment with a standard single lens reflex 35-mm endoscopic camera in a busy pediatric ears, nose, and throat setting. DESIGN Two digital cameras with an endoscope adapter and a step-down ring were evaluated to obtain optimal settings for digital endoscopic photography. The equipment was used in various clinical and surgical settings to inc...

in order to distinguish between benign and malignant types of pigmented skin lesions, computerized procedures have been developed for images taken by different equipment that the most available one of them is conventional digital cameras. in this research, a new procedure to detect malignant melanoma from benign pigmented lesions using macroscopic images is presented. the images are taken by co...

CMOS active pixel sensor technology, which is widely used these days for digital imaging, is based on analog pixels. Transition to digital pixel sensors can boost signal-to-noise ratios and enhance image quality, but can increase pixel area to dimensions that are impractical for the high-volume market of consumer electronic devices. There are two main approaches to digital pixel design. The fir...