Patterns of changes of tumour temperatures during clinical hyperthermia: Implications for treatment planning, evaluation and control
The patterns of changes in tumour temperatures were studied at selected times throughout 104 hyperthermia sessions. Temperature change patterns were analysed in the context of the known patterns of change of the applied power. First, of 69 extracranial treatments analysed, 74% indicated relatively f...
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Veröffentlicht in: | International journal of hyperthermia 1995, Vol.11 (3), p.425-436 |
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description | The patterns of changes in tumour temperatures were studied at selected times throughout 104 hyperthermia sessions. Temperature change patterns were analysed in the context of the known patterns of change of the applied power. First, of 69 extracranial treatments analysed, 74% indicated relatively flat temperatures at constant applied power during a major portion of the treatment, thereby indicating that during that time there were no major changes in any of the physical or physiological tissue parameters which contribute to the ability of the tumour tissue to remove energy (Pattern 1). Second, after reaching an initial steady state, approximately 14% of these extracranial treatments showed either steadily decreasing temperatures at constant power, or constant temperatures at steadily increasing applied power, thereby indicating that the tumour's ability to remove energy was steadily increasing in time following the initial steady state (Pattern 2). Finally, after reaching an initial steady state, the remaining 12% of these treatments showed a pronounced decrease in temperature occurring about 10-20 min into the treatment followed by increasing temperatures or levelling off of temperatures at a higher value than the temperature minimum that had occurred, all at constant applied power (Pattern 3). Of 35 brain treatments analysed, 80% followed Pattern 1, 14% followed Pattern 2, and 6% followed Pattern 3. Intratumoral heterogeneity was evident in some cases with approximately 44% of all treatments having at least one individual temperature sensor change in a manner that did not follow the average direction of change when all sensors were combined. For seven patients with permanent probes, the patterns of change presented in the first treatments were also observed during six out of seven of the second treatments. In addition, three out of the five patients who had an evaluable third treatment showed a pattern of change during that third treatment that was similar to the pattern observed in both treatment one and treatment two. |
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P. ; Hynynen, K. ; Roemer, R. B.</creator><creatorcontrib>Anhalt, D. P. ; Hynynen, K. ; Roemer, R. B.</creatorcontrib><description>The patterns of changes in tumour temperatures were studied at selected times throughout 104 hyperthermia sessions. Temperature change patterns were analysed in the context of the known patterns of change of the applied power. First, of 69 extracranial treatments analysed, 74% indicated relatively flat temperatures at constant applied power during a major portion of the treatment, thereby indicating that during that time there were no major changes in any of the physical or physiological tissue parameters which contribute to the ability of the tumour tissue to remove energy (Pattern 1). Second, after reaching an initial steady state, approximately 14% of these extracranial treatments showed either steadily decreasing temperatures at constant power, or constant temperatures at steadily increasing applied power, thereby indicating that the tumour's ability to remove energy was steadily increasing in time following the initial steady state (Pattern 2). Finally, after reaching an initial steady state, the remaining 12% of these treatments showed a pronounced decrease in temperature occurring about 10-20 min into the treatment followed by increasing temperatures or levelling off of temperatures at a higher value than the temperature minimum that had occurred, all at constant applied power (Pattern 3). Of 35 brain treatments analysed, 80% followed Pattern 1, 14% followed Pattern 2, and 6% followed Pattern 3. Intratumoral heterogeneity was evident in some cases with approximately 44% of all treatments having at least one individual temperature sensor change in a manner that did not follow the average direction of change when all sensors were combined. For seven patients with permanent probes, the patterns of change presented in the first treatments were also observed during six out of seven of the second treatments. In addition, three out of the five patients who had an evaluable third treatment showed a pattern of change during that third treatment that was similar to the pattern observed in both treatment one and treatment two.</description><identifier>ISSN: 0265-6736</identifier><identifier>EISSN: 1464-5157</identifier><identifier>DOI: 10.3109/02656739509022477</identifier><identifier>PMID: 7636328</identifier><identifier>CODEN: IJHYEQ</identifier><language>eng</language><publisher>London: Informa UK Ltd</publisher><subject>Biological and medical sciences ; blood flow ; Body Temperature ; Brain Neoplasms - blood supply ; Brain Neoplasms - physiopathology ; Brain Neoplasms - therapy ; human tumour ; Humans ; Hyperthermia ; Medical sciences ; Neoplasms - blood supply ; Neoplasms - physiopathology ; Neoplasms - therapy ; power control ; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) ; Regional Blood Flow ; Technology. Biomaterials. Equipments. Material. 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P.</creatorcontrib><creatorcontrib>Hynynen, K.</creatorcontrib><creatorcontrib>Roemer, R. B.</creatorcontrib><title>Patterns of changes of tumour temperatures during clinical hyperthermia: Implications for treatment planning, evaluation and control</title><title>International journal of hyperthermia</title><addtitle>Int J Hyperthermia</addtitle><description>The patterns of changes in tumour temperatures were studied at selected times throughout 104 hyperthermia sessions. Temperature change patterns were analysed in the context of the known patterns of change of the applied power. First, of 69 extracranial treatments analysed, 74% indicated relatively flat temperatures at constant applied power during a major portion of the treatment, thereby indicating that during that time there were no major changes in any of the physical or physiological tissue parameters which contribute to the ability of the tumour tissue to remove energy (Pattern 1). Second, after reaching an initial steady state, approximately 14% of these extracranial treatments showed either steadily decreasing temperatures at constant power, or constant temperatures at steadily increasing applied power, thereby indicating that the tumour's ability to remove energy was steadily increasing in time following the initial steady state (Pattern 2). Finally, after reaching an initial steady state, the remaining 12% of these treatments showed a pronounced decrease in temperature occurring about 10-20 min into the treatment followed by increasing temperatures or levelling off of temperatures at a higher value than the temperature minimum that had occurred, all at constant applied power (Pattern 3). Of 35 brain treatments analysed, 80% followed Pattern 1, 14% followed Pattern 2, and 6% followed Pattern 3. Intratumoral heterogeneity was evident in some cases with approximately 44% of all treatments having at least one individual temperature sensor change in a manner that did not follow the average direction of change when all sensors were combined. For seven patients with permanent probes, the patterns of change presented in the first treatments were also observed during six out of seven of the second treatments. In addition, three out of the five patients who had an evaluable third treatment showed a pattern of change during that third treatment that was similar to the pattern observed in both treatment one and treatment two.</description><subject>Biological and medical sciences</subject><subject>blood flow</subject><subject>Body Temperature</subject><subject>Brain Neoplasms - blood supply</subject><subject>Brain Neoplasms - physiopathology</subject><subject>Brain Neoplasms - therapy</subject><subject>human tumour</subject><subject>Humans</subject><subject>Hyperthermia</subject><subject>Medical sciences</subject><subject>Neoplasms - blood supply</subject><subject>Neoplasms - physiopathology</subject><subject>Neoplasms - therapy</subject><subject>power control</subject><subject>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</subject><subject>Regional Blood Flow</subject><subject>Technology. Biomaterials. Equipments. Material. Instrumentation</subject><subject>Time Factors</subject><subject>Ultrasonic Therapy</subject><subject>ultrasound</subject><issn>0265-6736</issn><issn>1464-5157</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1995</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9UUtv1DAQthCoLIUfwAHJB8SJgBM7the4oIpHpUpwgHM0cSaNK8cOtgPae394vd2lEkLqydb30sw3hDyv2Rtes-1b1shWKr5t2ZY1jVDqAdnUQoqqrVv1kGz2fFUE8jF5ktIVY0y0jTohJ0pyyRu9IdffIWeMPtEwUjOBv8Tbb17nsEaacV4wQl5jgYc1Wn9JjbPeGnB02hUuTxhnC-_o-by4AmcbStgYijci5Bl9posD74v1NcXf4NZbDQU_UBN8jsE9JY9GcAmfHd9T8vPzpx9nX6uLb1_Ozz5eVEZwlqtGIetRcF3WrU2tjRBMm0HrLfR9r9pB9zBAQXs-KhxBKeCmHxVXSg-yMfyUvDrkLjH8WjHlbrbJoCvjYVhTp5QQQkldhPVBaGJIKeLYLdHOEHddzbp9891_zRfPi2P42s843DmOVRf-5ZGHVNobI3hj052Mt0wyto_5cJBZX0qc4U-Ibugy7FyIfz38vine_2OfEFyeDETsrspBfan3nh1uANCntFQ</recordid><startdate>1995</startdate><enddate>1995</enddate><creator>Anhalt, D. P.</creator><creator>Hynynen, K.</creator><creator>Roemer, R. B.</creator><general>Informa UK Ltd</general><general>Taylor & Francis</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>1995</creationdate><title>Patterns of changes of tumour temperatures during clinical hyperthermia: Implications for treatment planning, evaluation and control</title><author>Anhalt, D. P. ; Hynynen, K. ; Roemer, R. B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c430t-27e0be4385091c18c4408cd889abbb75d8badac44b3f7efa77a3cbf73778d62c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1995</creationdate><topic>Biological and medical sciences</topic><topic>blood flow</topic><topic>Body Temperature</topic><topic>Brain Neoplasms - blood supply</topic><topic>Brain Neoplasms - physiopathology</topic><topic>Brain Neoplasms - therapy</topic><topic>human tumour</topic><topic>Humans</topic><topic>Hyperthermia</topic><topic>Medical sciences</topic><topic>Neoplasms - blood supply</topic><topic>Neoplasms - physiopathology</topic><topic>Neoplasms - therapy</topic><topic>power control</topic><topic>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</topic><topic>Regional Blood Flow</topic><topic>Technology. Biomaterials. Equipments. Material. Instrumentation</topic><topic>Time Factors</topic><topic>Ultrasonic Therapy</topic><topic>ultrasound</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Anhalt, D. P.</creatorcontrib><creatorcontrib>Hynynen, K.</creatorcontrib><creatorcontrib>Roemer, R. B.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>International journal of hyperthermia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Anhalt, D. P.</au><au>Hynynen, K.</au><au>Roemer, R. B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Patterns of changes of tumour temperatures during clinical hyperthermia: Implications for treatment planning, evaluation and control</atitle><jtitle>International journal of hyperthermia</jtitle><addtitle>Int J Hyperthermia</addtitle><date>1995</date><risdate>1995</risdate><volume>11</volume><issue>3</issue><spage>425</spage><epage>436</epage><pages>425-436</pages><issn>0265-6736</issn><eissn>1464-5157</eissn><coden>IJHYEQ</coden><abstract>The patterns of changes in tumour temperatures were studied at selected times throughout 104 hyperthermia sessions. Temperature change patterns were analysed in the context of the known patterns of change of the applied power. First, of 69 extracranial treatments analysed, 74% indicated relatively flat temperatures at constant applied power during a major portion of the treatment, thereby indicating that during that time there were no major changes in any of the physical or physiological tissue parameters which contribute to the ability of the tumour tissue to remove energy (Pattern 1). Second, after reaching an initial steady state, approximately 14% of these extracranial treatments showed either steadily decreasing temperatures at constant power, or constant temperatures at steadily increasing applied power, thereby indicating that the tumour's ability to remove energy was steadily increasing in time following the initial steady state (Pattern 2). Finally, after reaching an initial steady state, the remaining 12% of these treatments showed a pronounced decrease in temperature occurring about 10-20 min into the treatment followed by increasing temperatures or levelling off of temperatures at a higher value than the temperature minimum that had occurred, all at constant applied power (Pattern 3). Of 35 brain treatments analysed, 80% followed Pattern 1, 14% followed Pattern 2, and 6% followed Pattern 3. Intratumoral heterogeneity was evident in some cases with approximately 44% of all treatments having at least one individual temperature sensor change in a manner that did not follow the average direction of change when all sensors were combined. For seven patients with permanent probes, the patterns of change presented in the first treatments were also observed during six out of seven of the second treatments. In addition, three out of the five patients who had an evaluable third treatment showed a pattern of change during that third treatment that was similar to the pattern observed in both treatment one and treatment two.</abstract><cop>London</cop><pub>Informa UK Ltd</pub><pmid>7636328</pmid><doi>10.3109/02656739509022477</doi><tpages>12</tpages></addata></record> |
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subjects | Biological and medical sciences blood flow Body Temperature Brain Neoplasms - blood supply Brain Neoplasms - physiopathology Brain Neoplasms - therapy human tumour Humans Hyperthermia Medical sciences Neoplasms - blood supply Neoplasms - physiopathology Neoplasms - therapy power control Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) Regional Blood Flow Technology. Biomaterials. Equipments. Material. Instrumentation Time Factors Ultrasonic Therapy ultrasound |
title | Patterns of changes of tumour temperatures during clinical hyperthermia: Implications for treatment planning, evaluation and control |
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