What is the MRI excitation frequency for 1.5T and 3T MRI scanners?

The base excitation frequency (for hydrogen) is:

• 63.87 MHz for 1.5 Tesla MRI scanners
• 127.74 MHz for 3 Tesla MRI scanners

Note that the excitation frequency is not exactly one frequency but varies spatially based on the gradient field strength.

You can calculate the excitation frequency using

Excitation frequency [MHz] = 42.58 MHz/T * [magnetic field strength in Tesla]

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