MRI Basics Part 1 - Image Formation

[@jacobvandijk6525]

@ 3:20 Larmor-frequency (in rad/sec) = precession-frequency (in Hz.) x 2.pi. So the precession-frequency is the real frequency (in revolutions per second). The Larmor-frequency is not an ordinary frequency, but an ANGULAR frequency!

[@allandogreat]

There is course website or related text book related to this course?

[@SpinUpDownUnder]

than you a useful ntroduction except for the frequent refercne to radio waves. a radio wave has a dominant electrical field components and almost no magnetic fiedl. MRI operates on the spins entirely with the correctly polarized magnetic field at the larmor frequency. MR cils are designed to exploit the near field behaviour and minimise the electric field components, and in that important sense are not creating or receiving radio waves. Its a common error buut a significant one. Better to focus on teh energies involved and the real nature of a radio wave

[@ser7_ha]

please , can you answer this question Draw the net magnetization of protons' hydrogen when the first excitation pulse is 30 degree followed by 180 degree? Note: use primed Reference Frame.