DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i>
The article describes a determination method of the laser radiation with specific parameters effect on the eye tissues based on optoacoustic probing. Low-power probing laser with 7-10 ns pulses generates acoustic waves at the aiming point. The waves propagate through the medium (saline in a cuvette)...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Russian |
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Russian Academy of Sciences, Siberian Branch Publishing House
2019-02-01
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| Series: | Сибирский научный медицинский журнал |
| Subjects: | |
| Online Access: | https://sibmed.elpub.ru/jour/article/view/47 |
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| author | A. V. Ardamakova N. A. Fedoruk A. P. Lytkin A. V. Larichev V. I. Siplivyy |
| author_facet | A. V. Ardamakova N. A. Fedoruk A. P. Lytkin A. V. Larichev V. I. Siplivyy |
| author_sort | A. V. Ardamakova |
| collection | DOAJ |
| description | The article describes a determination method of the laser radiation with specific parameters effect on the eye tissues based on optoacoustic probing. Low-power probing laser with 7-10 ns pulses generates acoustic waves at the aiming point. The waves propagate through the medium (saline in a cuvette) to acoustic receiver. The characteristics of the acoustic wave give basis for estimation of optical absorption coefficient - a parameter that determines temperature in the affected area after applying therapeutic laser. Calculation of the temperature pattern was performed using a three-dimensional thermal conductivity model that enabled determination of temperature distribution at any local point during coagulation and immediately after. To compare the results with pre-calculated temperature field values, direct temperature measurement was taken from the surface of the absorbing layer. The experiment was performed on six human chorioretinal tissue samples in vitro; the obtained optical absorption coefficient values did not exceed 120-300 cm-1 with maximum error margin of 20 %. The computational model was seen to be in good agreement with experimental thermocouple measurements. |
| format | Article |
| id | doaj-art-001a8a3d018b471a8a54d412e25ee0c9 |
| institution | Kabale University |
| issn | 2410-2512 2410-2520 |
| language | Russian |
| publishDate | 2019-02-01 |
| publisher | Russian Academy of Sciences, Siberian Branch Publishing House |
| record_format | Article |
| series | Сибирский научный медицинский журнал |
| spelling | doaj-art-001a8a3d018b471a8a54d412e25ee0c92025-08-20T03:50:44ZrusRussian Academy of Sciences, Siberian Branch Publishing HouseСибирский научный медицинский журнал2410-25122410-25202019-02-01384444810.15372/SSMJ2018040647DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i>A. V. Ardamakova0N. A. Fedoruk1A. P. Lytkin2A. V. Larichev3V. I. Siplivyy4Research Institute of Eye DiseasesResearch Institute of Eye DiseasesLomonosov Moscow State UniversityLomonosov Moscow State UniversitySechenov UniversityThe article describes a determination method of the laser radiation with specific parameters effect on the eye tissues based on optoacoustic probing. Low-power probing laser with 7-10 ns pulses generates acoustic waves at the aiming point. The waves propagate through the medium (saline in a cuvette) to acoustic receiver. The characteristics of the acoustic wave give basis for estimation of optical absorption coefficient - a parameter that determines temperature in the affected area after applying therapeutic laser. Calculation of the temperature pattern was performed using a three-dimensional thermal conductivity model that enabled determination of temperature distribution at any local point during coagulation and immediately after. To compare the results with pre-calculated temperature field values, direct temperature measurement was taken from the surface of the absorbing layer. The experiment was performed on six human chorioretinal tissue samples in vitro; the obtained optical absorption coefficient values did not exceed 120-300 cm-1 with maximum error margin of 20 %. The computational model was seen to be in good agreement with experimental thermocouple measurements.https://sibmed.elpub.ru/jour/article/view/47optical absorption coefficienttemperature field distributionlaser coagulationoptoacoustics |
| spellingShingle | A. V. Ardamakova N. A. Fedoruk A. P. Lytkin A. V. Larichev V. I. Siplivyy DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> Сибирский научный медицинский журнал optical absorption coefficient temperature field distribution laser coagulation optoacoustics |
| title | DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> |
| title_full | DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> |
| title_fullStr | DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> |
| title_full_unstemmed | DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> |
| title_short | DETERMINATION OF THE TEMPERATURE FIELD DURING LASER COAGULATION of CHORIORETINAL COMPLEX WITH OPTOACOUSTIC <i>IN VITRO</i> |
| title_sort | determination of the temperature field during laser coagulation of chorioretinal complex with optoacoustic i in vitro i |
| topic | optical absorption coefficient temperature field distribution laser coagulation optoacoustics |
| url | https://sibmed.elpub.ru/jour/article/view/47 |
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