Biomedical spectral x-ray imaging: promises and challenges

Steven M. Jorgensen; Diane R. Eaker; Erik L. Ritman

doi:10.1117/12.904615

15 September 2011 Biomedical spectral x-ray imaging: promises and challenges

Steven M. Jorgensen, Diane R. Eaker, Erik L. Ritman

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Proceedings Volume 8143, Medical Applications of Radiation Detectors; 814302 (2011) https://doi.org/10.1117/12.904615
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Imaging arrays with sub-millimeter detector pixels that count and allocate energy to each detected photon are now being introduced into biomedical computed tomography scanners. Consequently, bremsstrahlung x-ray can provide the advantages of simultaneous recording of multiple quasi-monochromatic x-ray images which can be used for identification of various materials within the image field. This capability increases the inherent contrast within biomedical CT images and also introduces the ability to use high atomic weight "foreign" elements (e.g., strontium) which are surrogates for "native" biological elements (e.g., calcium) to monitor tissue function (e.g., bone deposition). Challenges for this methodology include limited maximum fluence due to photon pile-up, charge-sharing between contiguous pixels and heterogeneous pixel characteristics due to manufacturing difficulties.

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Steven M. Jorgensen, Diane R. Eaker, and Erik L. Ritman "Biomedical spectral x-ray imaging: promises and challenges", Proc. SPIE 8143, Medical Applications of Radiation Detectors, 814302 (15 September 2011); https://doi.org/10.1117/12.904615

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KEYWORDS

X-rays

X-ray imaging

X-ray computed tomography

Sensors

Photodetectors

Biomedical optics

X-ray sources

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