Tuesday, February 12, 2013

Time-of-Flight PET vs. MRA

Every time I hear Time-of-Flight TOF, I get confused because it can actually mean TOF PET or TOF MRA. The two acronyms have the some words: Time Of Flight, but have different meanings. 

TOF PET - This PET technology means that the time difference between two photons detected as a coincidence will be used to estimate the actual place of positron annihilation.

TOF MRA - This Magnetic Resonance angiography technique means that a sequence with small time of repetition TR will be used to saturate the stationary nucleus, while the flowing nucleus with Time-Of-Flight will be maximal. 

Both techniques produce beautiful images:

More information on TOF-PET:

More information on TOF-MRA: 

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