Non-Invasive Measurement of the Temperature Using Scanning Small Coils
The temperature measurement of tumor is very important for hyperthermia. A temperature is measured by inserting a thermocouple thermometer into a living body. The fault of this method is that it can get only partial temperature and it has large invasive to the patient. Therefore, it method can'...
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| Published in | Japanese Journal of Hyperthermic Oncology Vol. 20; no. 4; pp. 249 - 255 |
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| Main Authors | , , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Japanese Society for Thermal Medicine
01.12.2004
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0911-2529 1881-9516 |
| DOI | 10.3191/thermalmedicine.20.249 |
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| Abstract | The temperature measurement of tumor is very important for hyperthermia. A temperature is measured by inserting a thermocouple thermometer into a living body. The fault of this method is that it can get only partial temperature and it has large invasive to the patient. Therefore, it method can't know even if a part of temperature rises. We researched the matter whether temperature measurement could be done without stabbing a thermometer by using the small coils. A magnetic field is generated when the radio-frequency is charged with electricity of the high frequency to the objects. Magnetic field is caught with the coil which put this magnetic field on making it stand opposite to each other. The electric fields decrease by 1/ (2πr). Then, we can calculate the profile of the electric fields using this equation. There are strong correlation between the radio frequency current and temperature in this object. Therefore, we can estimate the temperature distribution in the heating object non-invasive. The results of this study confirmed, there was strong correlation between temperature distribution using thermography and distribution of RF currents from our methods. |
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| AbstractList | The temperature measurement of tumor is very important for hyperthermia. A temperature is measured by inserting a thermocouple thermometer into a living body. The fault of this method is that it can get only partial temperature and it has large invasive to the patient. Therefore, it method can't know even if a part of temperature rises. We researched the matter whether temperature measurement could be done without stabbing a thermometer by using the small coils. A magnetic field is generated when the radio-frequency is charged with electricity of the high frequency to the objects. Magnetic field is caught with the coil which put this magnetic field on making it stand opposite to each other. The electric fields decrease by 1/ (2πr). Then, we can calculate the profile of the electric fields using this equation. There are strong correlation between the radio frequency current and temperature in this object. Therefore, we can estimate the temperature distribution in the heating object non-invasive. The results of this study confirmed, there was strong correlation between temperature distribution using thermography and distribution of RF currents from our methods. |
| Author | ONO, HIROBUMI ANDO, SATOSHI MONZEN, HAJIME TAKAHASHI, TOHRU FUKUYAMA, ATSUSHI AMANO, MORIKAZU SUZUKI, TOMOAKI HASEGAWA, TAKEO MAEDA, KAYOKO YAMAMOTO, ITSUO |
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| References | 6) Delannoy J., LeBihan D., Hoult D. I., Levin R. L. : Hyperthermia system combined with a magnetic resonance imaging unit. Med Phys, 17 : 885-860, 1990. 7) John D. : Noninvasive MRI Thermometry with the Proton Resonance Frequency Method : Study of Susceptibility Effects. Magan Reson Med, 34 : 359-367, 1995. 3) Hasegawa T. : The Biological Ground on Hyperthermia for Malignant Tumors. Research Reports of Suzuka University of Medical Science, 3 : 3-9, 1996. 9) Bruno Q., Jacco A. Z., Chrit T. W. M. : Magnetic Resonance Temperature Imaging for Guidance of Thermotherapy. Journal of Magnetic Resonance Imaging, 12 : 525-533, 2000. 2) Hasegawa T. : What is the hyperthermia for the treatment of the cancer. Journal of the Japan Association of Radiological Technologists, 40 : 727-732, 1993. 5) Hasegawa T., Ishiguro Y., Shimpo S., Jo S., Nagata Y., Ostanpenko V., Tanaka Y. : Measurement of electromagnetic currents around heating area for non-invasive temperature monitoring during hyperthermia. Hyperthermic Oncology in Japan '94', Ed. Y. Tanaka, Koseisha : 232-233, 1995. 1) Eric J. H. : Radiology or the Radiologist. Fourth Edition : pp257-288, 1994. 8) Samulski T. V., MacFall J., Zhang Y., Grant W., Charles C. : Non-invasive thermometry using magnetic resonance diffusion imaging : potential for application in hyperthemic oncology. Int J Hyperthermia, 8 : 819-829, 1992. 4) Hasegawa T. : Measurement of the temperature distribution non-invasively during 2450MHz Microwave system. Research Reports of Suzuka University of Medical Science, 3 : 10-16, 1996. |
| References_xml | – reference: 8) Samulski T. V., MacFall J., Zhang Y., Grant W., Charles C. : Non-invasive thermometry using magnetic resonance diffusion imaging : potential for application in hyperthemic oncology. Int J Hyperthermia, 8 : 819-829, 1992. – reference: 4) Hasegawa T. : Measurement of the temperature distribution non-invasively during 2450MHz Microwave system. Research Reports of Suzuka University of Medical Science, 3 : 10-16, 1996. – reference: 1) Eric J. H. : Radiology or the Radiologist. Fourth Edition : pp257-288, 1994. – reference: 3) Hasegawa T. : The Biological Ground on Hyperthermia for Malignant Tumors. Research Reports of Suzuka University of Medical Science, 3 : 3-9, 1996. – reference: 6) Delannoy J., LeBihan D., Hoult D. I., Levin R. L. : Hyperthermia system combined with a magnetic resonance imaging unit. Med Phys, 17 : 885-860, 1990. – reference: 2) Hasegawa T. : What is the hyperthermia for the treatment of the cancer. Journal of the Japan Association of Radiological Technologists, 40 : 727-732, 1993. – reference: 9) Bruno Q., Jacco A. Z., Chrit T. W. M. : Magnetic Resonance Temperature Imaging for Guidance of Thermotherapy. Journal of Magnetic Resonance Imaging, 12 : 525-533, 2000. – reference: 7) John D. : Noninvasive MRI Thermometry with the Proton Resonance Frequency Method : Study of Susceptibility Effects. Magan Reson Med, 34 : 359-367, 1995. – reference: 5) Hasegawa T., Ishiguro Y., Shimpo S., Jo S., Nagata Y., Ostanpenko V., Tanaka Y. : Measurement of electromagnetic currents around heating area for non-invasive temperature monitoring during hyperthermia. Hyperthermic Oncology in Japan '94', Ed. Y. Tanaka, Koseisha : 232-233, 1995. |
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| Title | Non-Invasive Measurement of the Temperature Using Scanning Small Coils |
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