Related Experiment Video
Updated: Aug 2, 2026
07:16
Thermal Ablation for the Treatment of Abdominal Tumors
Published on: March 7, 2011
Radiofrequency lesion generation and its effect on tissue impedance
E R Cosman1, W J Rittman, B S Nashold
1Department of Physics, Massachusetts Institute of Technology, Cambridge.
Applied Neurophysiology
|January 1, 1988
Abstract:
The method of radiofrequency heat lesion generation is reviewed with specific reference to the dorsal root entry zone. Experimental data on the impedance of electrolytic media as a function of temperature are reported, and their relation to what should be observed during radiofrequency lesioning in the body is commented upon. The future utility of impedance monitoring is discussed as well as possible implications of bipolar lesion electrode systems.
More Related Videos
Related Concept Videos
01:29RLC Series Circuits: Impedance
When current flow is opposed in a DC or AC circuit, it is referred to as resistance or impedance, respectively. Impedance plays a key role in determining the performance of AC circuits. It is represented by Z, which is a combination of resistance and reactance, and depends upon the angular frequency, measured in ohms.
Thus, the magnitude of the impedance is given by the following equation,
Thus, the magnitude of the impedance is given by the following equation,
01:23Lossless Lines
In electrical engineering, a lossless transmission line is characterized by a purely imaginary propagation constant and a resistive characteristic impedance. The ABCD parameters, which describe the relationship between the input and output voltages and currents, indicate an equivalent π circuit with an imaginary series impedance and a shunt admittance. This results in a transmission line that, when the product of the phase constant (beta) and the length of the line is less than pi, exhibits...