MRI stands for My Radiant Inside

I just went through a scan called the MRI
Take my word: it isn't worth a try.
In the rarified world of academia
This chapter is 'An intro to claustrophobia'.

The sounds were from a broken hearse
Moving uphill in reverse.
I felt some needles and many pins
And nails on glass and sadistic djinns.

But when I went through the MRI
It was the bill that made me cry.