- #1
Aeronautic Freek
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Why SAR value at body is allways higher than at head?
Specific Absorption Rate(SAR) - caused from radio frequency from mobile phones
- Thread starter Aeronautic Freek
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SUMMARY
The discussion centers on the Specific Absorption Rate (SAR) of mobile phones, highlighting why the SAR value is consistently higher at the body compared to the head. This phenomenon is attributed to the poor impedance match caused by the skull bone, which reflects more energy than the softer tissues found in other body areas. Additionally, SAR is crucial in evaluating the safety of MRI scanners, influencing the implementation of MRI studies. Participants shared links to resources for further information, including a specific page detailing SAR values for various devices.
PREREQUISITES- Understanding of Specific Absorption Rate (SAR) in the context of radio frequency exposure
- Familiarity with the anatomy of the human skull and its impact on radio frequency absorption
- Knowledge of MRI safety standards and their relation to SAR values
- Basic navigation skills for online resources and specifications
- Research the impact of skull anatomy on radio frequency absorption in mobile devices
- Explore the safety standards for MRI scanners related to SAR values
- Learn how to interpret SAR specifications from device documentation
- Investigate the effects of different operating systems on accessing online specifications
Individuals interested in mobile technology safety, healthcare professionals assessing MRI scanner safety, and anyone researching the effects of radio frequency exposure on human health.
- #2
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SAR, what is that?
- #3
Aeronautic Freek
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Specific Absorption Rateanorlunda said:
- #4
Baluncore
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The poor impedance match due to the layer of skull bone reflects more energy than the soft tissues on other parts of the body that have only internal bones.Aeronautic Freek said:
- #5
berkeman
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Link to a reference please...Aeronautic Freek said:
- #6
gleem
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SAR is an important variable in assessing the safety of MRI scanners and may affect how MRI studies are implemented.
https://radiopaedia.org/articles/specific-absorption-rate?lang=us
https://radiopaedia.org/articles/specific-absorption-rate?lang=us
- #7
Aeronautic Freek
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https://www.devicespecifications.com/en/model-sar/5b6252a4berkeman said:
- #8
berkeman
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I don't get it. The link seems to show general specs, not a specific SAR number?Aeronautic Freek said:
- #9
Tom.G
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@berkeman
https://www.devicespecifications.com/en/model-sar/5b6252a4
You may have to click on the SAR tab, then scroll down.
(at least it works here)
https://www.devicespecifications.com/en/model-sar/5b6252a4
You may have to click on the SAR tab, then scroll down.
(at least it works here)
- #10
berkeman
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Thanks. I missed the SAR tab (duh), but clicking on it does not take me away from the general specs tab. Firefox on Win10 here.Tom.G said:
Can you post a screenshot of the SAR tab? Thanks.
- #11
Tom.G
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The SAR tab has 8 tables/graphs, if you haven't tried scrolling down after hitting the SAR tab, please try it. The spec. page stays there but the other tabs append to the that same spec. page. (That page acts like a cover letter.)
PF ignores my attempts to paste an image. I have to screen-grab, paste into a graphics pgm., save as a file, upload file; rather tedious. I'm willing if needed, but hoping you can get/retrieve it. Let me know.
(Firefox 43 on Win XP)
Cheers,
Tom
PF ignores my attempts to paste an image. I have to screen-grab, paste into a graphics pgm., save as a file, upload file; rather tedious. I'm willing if needed, but hoping you can get/retrieve it. Let me know.
(Firefox 43 on Win XP)
Cheers,
Tom
- #12
berkeman
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Got it now, thanks!Tom.G said:
That's likely the issue. You'd need a more modern OS to get the simpler paste feature, probably.Tom.G said:
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