Related Experiment Videos
Effect of field shaping on thermal pattern produced by external microwave
1Department of Radiation Oncology, Loma Linda University Medical Center, CA 92354.
Summary
External microwave heating patterns can be modified using shielding to protect sensitive tissues, especially in the head and neck. This technique reliably alters thermal patterns, leading to improved clinical patient tolerance during treatment.
Area of Science:
- Biomedical Engineering
- Medical Physics
- Oncology
Background:
- External microwave heating is used in clinical settings.
- Heating adjacent bone or soft tissues, particularly in the head and neck, can cause undesired side effects.
- Controlling microwave energy deposition is crucial for effective and safe treatment.
Purpose of the Study:
- To investigate the effect of shielding on external microwave heating patterns.
- To determine if shielding can reliably alter thermal distribution.
- To assess the clinical utility of modified heating patterns for improved patient tolerance.
Main Methods:
- A static phantom was utilized to measure thermal patterns.
- Symmetric and asymmetric shielding of the microwave applicator (BSD MA 150) was applied.
- The impact of shielding on the microwave field and subsequent thermal distribution was analyzed.
Main Results:
- Shielding reliably and predictably altered the thermal patterns generated by the microwave applicator.
- Both symmetric and asymmetric shielding demonstrated effectiveness in modifying heat distribution.
- The observed predictable alterations suggest a controllable method for managing microwave energy deposition.
Conclusions:
- Modification of external microwave heating patterns via shielding is a viable clinical strategy.
- This method effectively reduces undesired energy coupling to adjacent tissues, notably in the head and neck.
- Clinical application of this technique has resulted in enhanced patient tolerance, indicating its therapeutic benefit.