Identification of Biliary and Urinary Calculi by Optical Spectroscopy Compared to X-Ray Diffractometry

Waldhausen, W. V.; Fitzner, Rudolf; Scholz, Christian W.; Borning, W.; Brodzinski, T.; Helfmann, Jürgen

doi:10.1007/978-3-642-73864-7_5

Laser Lithotripsy 1988

DOI: 10.1007/978-3-642-73864-7_5

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Identification of Biliary and Urinary Calculi by Optical Spectroscopy Compared to X-Ray Diffractometry

W. V. Waldhausen¹,

Rudolf Fitzner²,

Christian W. Scholz³

et al.

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“…Because the stone absorption increases to the uv [2] the plasma threshold is lower with shorter wavelength. The earlier a plasma is established the better the following laser energy is heating this plasma and the better is the efficiency.…”

mentioning

confidence: 99%

<title>New alternative for laser lithotropsy-long pulse passively q-switched solid-state laser with fiber-based resonator</title>

Mueller¹,

Helfmann²,

Pashinin

et al. 1994

SPIE Proceedings

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mentioning

confidence: 99%

<title>New alternative for laser lithotropsy-long pulse passively q-switched solid-state laser with fiber-based resonator</title>

Mueller¹,

Helfmann²,

Pashinin

et al. 1994

SPIE Proceedings

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<title>Efficiency of stone fragmentation by long pulses of a Q-switched Nd:YAG laser</title>

et al. 1992

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With a long pulsed Nd:YAG-laser (pulse duration 300 ns) with the fundamental and (or) second harmonic wavelength the fragmentation of different urological and gall stones has been investigated. With 200 and 400 .tm fibers in a contact application all types of stones could be fragmented with energies less than 120 mJ (400 .tm fiber) or 45 mJ (200 tm fiber). By use of a double pulsesimultaneous application of second harmonic and fundamental radiation -the efficiency of fragmentation could be increased and energy threshold decreased. Laser system: A Q-switched Nd:YAG laser (fig. 1) with an oscillator in a polarization closed loop resonator is producing long laser pulses. 1 2 KTP Lens Crystai Q-switched Nd:YAG-Laser Ou 90°-Rotator M Fig. 1: Schematic description of the laser set up. Pockels Cell M Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/23/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Identification of Biliary and Urinary Calculi by Optical Spectroscopy Compared to X-Ray Diffractometry

Cited by 2 publications

References 0 publications

<title>New alternative for laser lithotropsy-long pulse passively q-switched solid-state laser with fiber-based resonator</title>

<title>New alternative for laser lithotropsy-long pulse passively q-switched solid-state laser with fiber-based resonator</title>

<title>Efficiency of stone fragmentation by long pulses of a Q-switched Nd:YAG laser</title>

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