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Date:7/14/2010

higher RBE."

The presentation "Linear Energy Transfer of Proton Clusters" by E Fourkal et al. will be at 1:30 p.m. on Sunday, July 18 in area 2 of the exhibit hall of the Philadelphia Convention Center.

ABSTRACT: http://www.aapm.org/meetings/amos2/pdf/49-12901-51016-247.pdf


11) SOLID-STATE X-RAY INTENSIFIERS

In traditional x-ray image intensifiers (XIIs), developed in the 1950s, X-rays, having passed through a patient's body, were converted to secondary electrons, which were accelerated by high voltages in bulky vacuum tubes. The electrons, in turn, were subsequently converted back into light, which finally was recorded by a camera. This method was used to achieve image intensification and results in distortions of the images. Although still in use, XII's began to be replaced in the 1990s by flat panel imagers, which proved to have problems of their own, such as limited spatial resolution and poor image quality for low X-ray exposures.

New solid state X-ray image intensifiers (SSXII's) based on electron-multiplying solid state sensors, developed by researchers at the University at Buffalo over the past several years, can provide superior medical imaging capabilities. The SSXII is a high-sensitivity, high resolution imager that can be operated in real-time to provide movie-like images with negligible additive electronic instrumentation noise.

Dr. Andrew Kuhls-Gilcrist of the University at Buffalo says that the next generation of SSXII devices will have an expanded field-of-view to enable larger region-of-interest imaging. "Seeing images taken with the new SSXII is like viewing high-definition TV for the first time," says Kuhls-Gilcrist. Using an extensible modular array design, the field-of-view can be expanded to larger sizes for eventual imaging of entire organs. Additional design improvements are expected to provide even gr
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Contact: Jason Socrates Bardi
jbardi@aip.org
858-775-4080
American Institute of Physics
Source:Eurekalert

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