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The use of novel digital power supply to drive laser systems. / Daniele Doneddu

Swansea University Author: Daniele, Doneddu

Abstract

Light-based therapies are becoming increasingly important and widely applied within the clinical practice. Their advantages over more traditional therapies have created an expanding market which is driving the development of more efficient and sophisticated devices. These devices allow a more precis...

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Published: 2010
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42441
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spelling 2018-08-29T14:36:47.0349725 v2 42441 2018-08-02 The use of novel digital power supply to drive laser systems. 51c6d55c30fd2a3615a12f7ff4032063 NULL Daniele Doneddu Daniele Doneddu true true 2018-08-02 Light-based therapies are becoming increasingly important and widely applied within the clinical practice. Their advantages over more traditional therapies have created an expanding market which is driving the development of more efficient and sophisticated devices. These devices allow a more precise control of the characteristics of the optical output to maximise benefits of the treatment. Although many studies have been conducted on light, and more specifically lasers, both from a therapeutic and a technological perspective, there is still much research to be undertaken. Laser systems have been used for more than two decades for the treatment of vascular lesions. Indeed the application of selective photothermolysis utilising the monochromaticity of the laser system has become the treatment of choice. However the treatment of larger blood vessels remains problematic. Many workers have, for theoretical and clinical reasons, elected to choose the YAG laser for the treatment of larger thread veins and vascular lesions containing larger vessels. The therapeutic output has been mixed and the need for further work identified. This thesis describes the design of a novel approach to the control of the temporal profile of the YAG laser. The design aspect of the work includes a computer modelling study which shows that careful control of the temporal parameters can in principle improve the therapeutic output. A novel approach to the digital control of the flashlamps pumping the YAG crystal is also described. The digital control of the flashlamp translates to sensitive control of the temporal profile of the laser output in a way that has not been described to date. The thesis therefore concludes that control of the temporal output of the YAG laser, if possible, should give improved therapeutic output and that the necessary level of control can be achieved by advanced digital techniques. Future clinical work should prove improved therapeutic results. E-Thesis Biomedical engineering. 31 12 2010 2010-12-31 COLLEGE NANME Swansea University Medical School COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-29T14:36:47.0349725 2018-08-02T16:24:29.2597915 Swansea University Medical School Swansea University Medical School Daniele Doneddu NULL 1 0042441-02082018162454.pdf 10798149.pdf 2018-08-02T16:24:54.6570000 Output 20005962 application/pdf E-Thesis true 2018-08-02T16:24:54.6570000 false
title The use of novel digital power supply to drive laser systems.
spellingShingle The use of novel digital power supply to drive laser systems.
Daniele, Doneddu
title_short The use of novel digital power supply to drive laser systems.
title_full The use of novel digital power supply to drive laser systems.
title_fullStr The use of novel digital power supply to drive laser systems.
title_full_unstemmed The use of novel digital power supply to drive laser systems.
title_sort The use of novel digital power supply to drive laser systems.
author_id_str_mv 51c6d55c30fd2a3615a12f7ff4032063
author_id_fullname_str_mv 51c6d55c30fd2a3615a12f7ff4032063_***_Daniele, Doneddu
author Daniele, Doneddu
author2 Daniele Doneddu
format E-Thesis
publishDate 2010
institution Swansea University
college_str Swansea University Medical School
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hierarchy_top_title Swansea University Medical School
hierarchy_parent_id swanseauniversitymedicalschool
hierarchy_parent_title Swansea University Medical School
department_str Swansea University Medical School{{{_:::_}}}Swansea University Medical School{{{_:::_}}}Swansea University Medical School
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description Light-based therapies are becoming increasingly important and widely applied within the clinical practice. Their advantages over more traditional therapies have created an expanding market which is driving the development of more efficient and sophisticated devices. These devices allow a more precise control of the characteristics of the optical output to maximise benefits of the treatment. Although many studies have been conducted on light, and more specifically lasers, both from a therapeutic and a technological perspective, there is still much research to be undertaken. Laser systems have been used for more than two decades for the treatment of vascular lesions. Indeed the application of selective photothermolysis utilising the monochromaticity of the laser system has become the treatment of choice. However the treatment of larger blood vessels remains problematic. Many workers have, for theoretical and clinical reasons, elected to choose the YAG laser for the treatment of larger thread veins and vascular lesions containing larger vessels. The therapeutic output has been mixed and the need for further work identified. This thesis describes the design of a novel approach to the control of the temporal profile of the YAG laser. The design aspect of the work includes a computer modelling study which shows that careful control of the temporal parameters can in principle improve the therapeutic output. A novel approach to the digital control of the flashlamps pumping the YAG crystal is also described. The digital control of the flashlamp translates to sensitive control of the temporal profile of the laser output in a way that has not been described to date. The thesis therefore concludes that control of the temporal output of the YAG laser, if possible, should give improved therapeutic output and that the necessary level of control can be achieved by advanced digital techniques. Future clinical work should prove improved therapeutic results.
published_date 2010-12-31T03:57:42Z
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score 10.84241