Is it possible to meet the MR conditions when scanning a brain with a resonant frequency of 128MHz on a 1.5T unit?

The resonant frequency of a tissue is determined by the strength of the magnetic field and the magnetic properties of that tissue, following the Larmor equation. Given that the Larmor frequency for protons in a 1.5T magnetic field is approximately 63.87 MHz, a brain resonant frequency of 128 MHz exceeds the capabilities of standard clinical MRI systems operating at this field strength.

In MRI, the general principle is that the resonant frequency must align within the operational frequency ranges of the system used. The 1.5T unit cannot safely and effectively accommodate the resonant frequency of 128 MHz for brain imaging, as the system is not designed to operate at frequencies beyond its threshold. This misalignment creates substantial safety and imaging quality concerns since higher frequencies may lead to increased heating, noise, and other adverse effects.

Therefore, it is indeed not possible to meet the MRI conditions for scanning a brain with that resonant frequency on a 1.5T unit.