Abstract
A mathematical model has been developed, which is able to predict power distributions in biological tissues during microwave hyperthermia delivered by waveguide applicators. The numerical solution of Maxwell's equations was obtained by the finite-difference time-domain (FDTD) technique. Two improvements with respect to the standard implementation of FDTD were introduced: a separation between the source and load calculations (based on the Schelkunoff equivalence principle) and a simple routine that automatically recognises the steady state. Two commercially available applicators, a dual-ridged and a side-loaded waveguide, were modelled using their theoretical aperture fields. The absorption rate density (ARD) distributions delivered by these applicators were measured through phantom thermal dosimetry and compared with the patterns estimated by the stimulation.
| Original language | English |
|---|---|
| Pages (from-to) | 891-904 |
| Number of pages | 14 |
| Journal | Physics in Medicine and Biology |
| Volume | 35 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1990 |
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ASJC Scopus subject areas
- Biomedical Engineering
- Physics and Astronomy (miscellaneous)
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
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Absorption rate density (ARD) computation in microwave hyperthermia by the finite-difference time-domain method. / Pontalti, R.; Cristoforetti, L.; Valdagni, R.; Antolini, R.
In: Physics in Medicine and Biology, Vol. 35, No. 7, 1990, p. 891-904.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Absorption rate density (ARD) computation in microwave hyperthermia by the finite-difference time-domain method
AU - Pontalti, R.
AU - Cristoforetti, L.
AU - Valdagni, R.
AU - Antolini, R.
PY - 1990
Y1 - 1990
N2 - A mathematical model has been developed, which is able to predict power distributions in biological tissues during microwave hyperthermia delivered by waveguide applicators. The numerical solution of Maxwell's equations was obtained by the finite-difference time-domain (FDTD) technique. Two improvements with respect to the standard implementation of FDTD were introduced: a separation between the source and load calculations (based on the Schelkunoff equivalence principle) and a simple routine that automatically recognises the steady state. Two commercially available applicators, a dual-ridged and a side-loaded waveguide, were modelled using their theoretical aperture fields. The absorption rate density (ARD) distributions delivered by these applicators were measured through phantom thermal dosimetry and compared with the patterns estimated by the stimulation.
AB - A mathematical model has been developed, which is able to predict power distributions in biological tissues during microwave hyperthermia delivered by waveguide applicators. The numerical solution of Maxwell's equations was obtained by the finite-difference time-domain (FDTD) technique. Two improvements with respect to the standard implementation of FDTD were introduced: a separation between the source and load calculations (based on the Schelkunoff equivalence principle) and a simple routine that automatically recognises the steady state. Two commercially available applicators, a dual-ridged and a side-loaded waveguide, were modelled using their theoretical aperture fields. The absorption rate density (ARD) distributions delivered by these applicators were measured through phantom thermal dosimetry and compared with the patterns estimated by the stimulation.
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U2 - 10.1088/0031-9155/35/7/006
DO - 10.1088/0031-9155/35/7/006
M3 - Article
VL - 35
SP - 891
EP - 904
JO - Physics in Medicine and Biology
JF - Physics in Medicine and Biology
SN - 0031-9155
IS - 7
ER -