The field dependence of NMR imaging. I. Laboratory assessment of signal-to-noise ratio and power deposition

Signal-to-noise ratio and absorbed power

Signal-to-noise ratio and absorbed power as functions of main magnetic field strength, and definition of “90°” RF pulse for the head in the birdcage coil

✍ Christopher M. Collins; Michael B. Smith 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 409 KB

## Abstract Calculations of the RF magnetic (__B__~1~) field as a function of frequency between 64 and 345 MHz were performed for a head model in an idealized birdcage coil. Absorbed power (__P__~abs~) and SNR were calculated at each frequency with three different methods of defining excitation pul