Mr. Eric Jude L. Morris Profile

Eric Jude L. Morris

at Univ of Tennessee Health Science Ctr

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Proceedings Article | 20 April 2005 Paper

A backscattered x-ray imager for medical applications

Eric Jude Morris, Frank Dibianca, Hemant Shukla, Daya Gulabani

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.595507

KEYWORDS: Signal to noise ratio, X-rays, Photons, Backscatter, X-ray imaging, Sensors, Medical imaging, Monte Carlo methods, Calcium, Radiography

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Conventional X-ray radiographic systems rely on transmitted photons for the production of images. Backscatter imaging makes use of the more abundant scattered photons for image formation. Specifically, incoherently (Compton) scattered X-ray photons are detected and used for image formation in this modality of medical imaging. However, additional information is obtained when the transmitted X-ray photons are also detected and used. Transmission radiography produces a two-dimensional image of a three dimensional system, therefore image information from a shallower object is often contaminated by image information from underlying objects. Backscattered x-ray imaging largely overcomes this deficiency by imaging depth selectively, which reduces corruption of shallow imaging information by information from deeper objects lying under it. Backscattered x-ray imaging may be particularly useful for examining anatomical structures at shallow depths beneath the skin. Some typical applications for such imaging might be breast imaging, middle ear imaging, imaging of skin melanomas, etc. Previous investigations, by way of theoretical calculations and computational simulations into the feasibility of this kind of imaging have uncovered high-contrast and SNR parameters. Simulations indicate that this method can be used for imaging relatively high-density objects at depths of up to approximately five centimeters below the surface. This paper presents both theoretical and experimental SNR results on this new medical imaging modality.

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