Energy-selective laser-based x-ray source for mammography

Andrzej Krol; Jean-Claude Kieffer; Walter Huda; Zhiming Jiang; Charles C. Chamberlain; Jianfan Yu

doi:10.1117/12.317088

24 July 1998 Energy-selective laser-based x-ray source for mammography

Andrzej Krol, Jean-Claude Kieffer, Walter Huda, Zhiming Jiang, Charles C. Chamberlain, Jianfan Yu

Proceedings Volume 3336, Medical Imaging 1998: Physics of Medical Imaging; (1998) https://doi.org/10.1117/12.317088
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

X-ray spectra suitable for mammography, created by laser-based x-ray source at laser intensity about 10¹⁸ W/cm², where investigated. The spectra consisted of a continuous bremsstrahlung emission and discrete K_(alpha ), K_(beta ) lines and have been obtained for Mo, Rh, Ag, In and Sn targets (Z equals 42, 45, 47, 49, and 50) with K_(alpha ) emissions at 17.4, 20.2, 22.2, 24.2, and 25.3 keV, respectively. The continuous bremsstrahlung component extended to high energies with no cut-off energy. The shape of the continuous bremsstrahlung spectrum was described by the function E^-p, where p (greater than 0) was primarily determined by the temperature of hot electrons produced in laser beam- target interaction. The absolute value of x-ray yield was proportional to the atomic number of the target Z. The intensity of characteristic x-rays was about a factor of five higher than the corresponding bremsstrahlung, and showed weak dependence (increase) when the atomic number of the target increased from Z equals 42 to Z equals 50.

Citation Download Citation

Andrzej Krol, Jean-Claude Kieffer, Walter Huda, Zhiming Jiang, Charles C. Chamberlain, and Jianfan Yu "Energy-selective laser-based x-ray source for mammography", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); https://doi.org/10.1117/12.317088

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