Scientists from Germany and the Czech Republic have shown that domestic cattle and roe deer across the globe tend to graze aligned to North-South magnetic field lines. Using satellite data from Google Earth, they state that
“Because climatic factors like wind, sun, or temperature were apparently not common directional key factors explaining ubiquitous alignment, we conclude that the magnetic field is the only common and most likely factor responsible for the observed alignment.”
Gives a new meaning to “animal magnetism”.
Or acronym hell. A look at the (ab)use of the English language for marketing MRI acquistion pulse sequences and methods.
Continue Reading »
Here is a basic summary of what DTI is all about, and what some of those DTI parametric maps represent.
A one-page cheat sheet is at the end.
Continue Reading »
Announcing—a MRI puzzle for Christmas 2007… a MRI Physics Cryptic Crossword.
First prize is a 20q game, which is an incredible little device which can guess what you’re thinking, by asking twenty apparently inane questions like “Is it larger than a duck?”.
Submit your answers to crossword@revisemri.com. Go for it! Competition ended.
Continue Reading »
Felix Bloch
Nobel Prize in Physics lecture, 11th December 1952:
“To follow the analogue of mechanical resonance we must now come back to relaxation, which can be seen to act like a friction, and which counteracts the tilt produced by the alternating field.”
Continue Reading »
