Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region

Margarethus M. Paulides; Stefan H.J.A. Vossen; Adrianus P.M. Zwamborn; Gerard C. van Rhoon

doi:10.1016/j.ijrobp.2005.04.048

Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region

Margarethus M. Paulides, Stefan H.J.A. Vossen, Adrianus P.M. Zwamborn, Gerard C. van Rhoon

Electromagnetics

Research output: Contribution to journal › Article › Academic › peer-review

43 Citations (Scopus)

Abstract

PURPOSE: To investigate the ability to deposit radiofrequency energy centrally in the neck as a function of antenna positions, number of antennas, and operating frequency.

METHODS AND MATERIALS: Power absorption (PA) distributions in a realistic model of the head-and-neck anatomy are calculated in which the head model is irradiated by an array of dipole antennas. The relative PA distributions corresponding to different setups are visualized and analyzed using the ratio of the average PA (aPA) in the target and neck region.

RESULTS: Both the PA distributions and aPA ratios indicate an optimal focusing ability of the setups (i.e., the ability to direct energy efficiently into the target region), between 400 and 600 MHz. In this frequency band, the focusing ability depends only moderately on the size of the neck. Finally, it is found that the focusing ability at 433 MHz is increased significantly by increasing the number of antenna elements.

CONCLUSIONS: The optimal frequency is found to be highly dependent on the size of the target volume; thus, a single optimum is hard to define. However, future clinical research will focus on 433 MHz based on the optimal range of frequencies, as found in this study.

Original language	English
Pages (from-to)	634-642
Number of pages	9
Journal	International Journal of Radiation Oncology, Biology, Physics
Volume	63
Issue number	2
DOIs	https://doi.org/10.1016/j.ijrobp.2005.04.048
Publication status	Published - 1 Oct 2005

Keywords

Feasibility Studies
Head and Neck Neoplasms/radiotherapy
Humans
Hyperthermia, Induced/instrumentation
Neck/anatomy & histology
Radio Waves/therapeutic use

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10.1016/j.ijrobp.2005.04.048

Cite this

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title = "Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region",

abstract = "PURPOSE: To investigate the ability to deposit radiofrequency energy centrally in the neck as a function of antenna positions, number of antennas, and operating frequency.METHODS AND MATERIALS: Power absorption (PA) distributions in a realistic model of the head-and-neck anatomy are calculated in which the head model is irradiated by an array of dipole antennas. The relative PA distributions corresponding to different setups are visualized and analyzed using the ratio of the average PA (aPA) in the target and neck region.RESULTS: Both the PA distributions and aPA ratios indicate an optimal focusing ability of the setups (i.e., the ability to direct energy efficiently into the target region), between 400 and 600 MHz. In this frequency band, the focusing ability depends only moderately on the size of the neck. Finally, it is found that the focusing ability at 433 MHz is increased significantly by increasing the number of antenna elements.CONCLUSIONS: The optimal frequency is found to be highly dependent on the size of the target volume; thus, a single optimum is hard to define. However, future clinical research will focus on 433 MHz based on the optimal range of frequencies, as found in this study.",

keywords = "Feasibility Studies, Head and Neck Neoplasms/radiotherapy, Humans, Hyperthermia, Induced/instrumentation, Neck/anatomy \& histology, Radio Waves/therapeutic use",

author = "Paulides, \{Margarethus M.\} and Vossen, \{Stefan H.J.A.\} and Zwamborn, \{Adrianus P.M.\} and \{van Rhoon\}, \{Gerard C.\}",

year = "2005",

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doi = "10.1016/j.ijrobp.2005.04.048",

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Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region. / Paulides, Margarethus M.; Vossen, Stefan H.J.A.; Zwamborn, Adrianus P.M. et al.
In: International Journal of Radiation Oncology, Biology, Physics, Vol. 63, No. 2, 01.10.2005, p. 634-642.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region

AU - Paulides, Margarethus M.

AU - Vossen, Stefan H.J.A.

AU - Zwamborn, Adrianus P.M.

AU - van Rhoon, Gerard C.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - PURPOSE: To investigate the ability to deposit radiofrequency energy centrally in the neck as a function of antenna positions, number of antennas, and operating frequency.METHODS AND MATERIALS: Power absorption (PA) distributions in a realistic model of the head-and-neck anatomy are calculated in which the head model is irradiated by an array of dipole antennas. The relative PA distributions corresponding to different setups are visualized and analyzed using the ratio of the average PA (aPA) in the target and neck region.RESULTS: Both the PA distributions and aPA ratios indicate an optimal focusing ability of the setups (i.e., the ability to direct energy efficiently into the target region), between 400 and 600 MHz. In this frequency band, the focusing ability depends only moderately on the size of the neck. Finally, it is found that the focusing ability at 433 MHz is increased significantly by increasing the number of antenna elements.CONCLUSIONS: The optimal frequency is found to be highly dependent on the size of the target volume; thus, a single optimum is hard to define. However, future clinical research will focus on 433 MHz based on the optimal range of frequencies, as found in this study.

AB - PURPOSE: To investigate the ability to deposit radiofrequency energy centrally in the neck as a function of antenna positions, number of antennas, and operating frequency.METHODS AND MATERIALS: Power absorption (PA) distributions in a realistic model of the head-and-neck anatomy are calculated in which the head model is irradiated by an array of dipole antennas. The relative PA distributions corresponding to different setups are visualized and analyzed using the ratio of the average PA (aPA) in the target and neck region.RESULTS: Both the PA distributions and aPA ratios indicate an optimal focusing ability of the setups (i.e., the ability to direct energy efficiently into the target region), between 400 and 600 MHz. In this frequency band, the focusing ability depends only moderately on the size of the neck. Finally, it is found that the focusing ability at 433 MHz is increased significantly by increasing the number of antenna elements.CONCLUSIONS: The optimal frequency is found to be highly dependent on the size of the target volume; thus, a single optimum is hard to define. However, future clinical research will focus on 433 MHz based on the optimal range of frequencies, as found in this study.

KW - Feasibility Studies

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KW - Humans

KW - Hyperthermia, Induced/instrumentation

KW - Neck/anatomy & histology

KW - Radio Waves/therapeutic use

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DO - 10.1016/j.ijrobp.2005.04.048

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JO - International Journal of Radiation Oncology, Biology, Physics

JF - International Journal of Radiation Oncology, Biology, Physics

IS - 2

ER -

Theoretical investigation into the feasibility to deposit RF energy centrally in the head-and-neck region

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Keywords

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