Page 8 - Computational Modeling in Biomedical Engineering and Medical Physics
P. 8
viii Contents
Magnetic drug transfer thorough larger vessels 201
Magnetic drug transfer through the membrane and tissue 204
References 210
7. Magnetic stimulation and therapy 217
7.1 Introduction 217
7.2 Magnetic stimulation of long cell fibers, a reduced mathematical model 220
Cable theory and the activating function 220
A computational model for the induced electric field and the activating
function 223
The activating function produced by circular coils 225
Example of activation function distribution inside the body 227
7.3 Magnetic stimulation of the spinal cord 230
Modeling the lumbar magnetic stimulation 230
Numerical simulation results 233
7.4 Transcranial magnetic stimulation 234
Modeling the transcranial magnetic stimulation 235
Numerical simulation results 237
7.5 Magnetic therapy 239
Modeling the magnetic field therapy 240
Numerical simulation results 242
References 245
8. Hyperthermia and ablation 249
8.1 Thermotherapy methods 249
Hyperthermia 249
Ablation 252
8.2 Radiofrequency thermotherapy 253
Thermal ablation of a kidney tumor 255
Mathematical modeling 255
Numerical modeling 259
Some thermographic considerations 263
8.3 Pin interstitial applicators for microwave hyperthermia 266
Numerical analysis of heating when blood flow is taken into account 268
Thermal analysis in mild hyperthermia of soft tissue 271
Temperature-dependent dielectric properties 275