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EVALUATION OF 915-MHZ AND 2450-MHZ DIRECT CONTACT DIATHERMY APPLICATORS

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The 915-MHz circularly polarized applicators penetrated deeper into muscle with less superficial heating than the 2450-MHz applicator.

Plain English Summary

Summary written for general audiences

The study evaluated three 915-MHz circularly polarized applicators. Heating patterns were measured in a bi-layered planar tissue model and compared with a 915-MHz linearly polarized applicator and a 2450-MHz circularly polarized applicator. The 915-MHz applicators achieved penetration depths of 2.8 to 3.1 cm in muscle versus 2.0 cm for the 2450-MHz applicator. Fat-to-muscle SAR ratios were 0.42 to 0.48 for 915-MHz applicators and about 1.0 for the 2450-MHz applicator.

Why This Matters

The 915-MHz circularly polarized applicators produced circularly symmetrical heating patterns, while the 915-MHz linearly polarized and 2450-MHz circularly polarized applicators produced elliptical patterns. The width of uniform SAR increased with applicator aperture size, ranging from 5.8 cm for the 8.9 cm applicator to 8.3 cm for the 11.1 cm IDLA.

Cite This Study
Unknown (n.d.). EVALUATION OF 915-MHZ AND 2450-MHZ DIRECT CONTACT DIATHERMY APPLICATORS.
Show BibTeX
@article{evaluation_of_915_mhz_and_2450_mhz_direct_contact_diathermy_applicators_g5468,
  author = {Unknown},
  title = {EVALUATION OF 915-MHZ AND 2450-MHZ DIRECT CONTACT DIATHERMY APPLICATORS},
  year = {n.d.},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

Three 915-MHz circularly polarized applicators were compared with a 915-MHz linearly polarized applicator and a 2450-MHz circularly polarized applicator.
The 915-MHz applicators penetrated 2.8 to 3.1 cm into muscle, while the 2450-MHz applicator penetrated 2.0 cm.
The 915-MHz applicators had fat-to-muscle SAR ratios of 0.42 to 0.48, while the 2450-MHz applicator had a ratio of approximately 1.0.
The 915-MHz circularly polarized applicators produced circularly symmetrical patterns, while the 915-MHz linearly polarized and 2450-MHz circularly polarized applicators produced elliptical patterns.
Larger aperture applicators produced wider uniform SAR patterns, with widths of 5.8 cm for the 8.9 cm applicator, 7.2 cm for the 11.1 cm applicator, and 8.3 cm for the 11.1 cm IDLA.