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| | | | | Searchterm 'Frequency' was also found in the following services: | | | | |
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Frequency | |
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(F) The number of repetitions of a periodic process per unit time. It is related to angular frequency, w, by f = w/2 p. In electromagnetic radiation, it is usually expressed in units of Hertz (Hz), where 1 Hz = 1 cycle per second. | | | | | • Share the entry 'Frequency': | | | | | | | | Further Reading: | News & More:
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| | | Searchterm 'Frequency' was also found in the following services: | | | | |
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Image Guidance
The higher the frequency, the larger will be the amount of heat developed. The more ionic the biochemical environment in the tissue, the more energy that will be deposited as heat.
This effect is well known for homogeneous model systems, but the complex structure of various human tissues makes detailed theoretical calculations very difficult, if not impossible.
By scanning problems, it is important to verify the transmission frequency. If the RF transmitted into the patient was, e.g. 5000 Hz lower than the resonance frequency of the protons, no protons was excited, and no signal returns. | | | | • View the DATABASE results for 'Radio Frequency' (72).
| | | • View the NEWS results for 'Radio Frequency' (2).
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| | | | • View the DATABASE results for 'Frequency Offset' (3).
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| | | Searchterm 'Frequency' was also found in the following services: | | | | |
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| | | | • View the DATABASE results for 'Larmor Frequency' (27).
| | | | Further Reading: | Basics:
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News & More:
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| | | Searchterm 'Frequency' was also found in the following services: | | | | |
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| | | | • View the DATABASE results for 'Angular Frequency' (6).
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