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MRI Sequences

Sequences

Denis Hoa

MRI is the imaging technique that has most benefited from technological innovation. The many advances have led to improvements in quality and acquisition speed. 
Each sequence is a subtle combination of radiofrequency pulses and gradients. Whatever the type of sequence, the aims are to favor the signal of a particular tissue (contrast), as quickly as possible (speed), while limiting the artifacts and without altering the signal to noise ratio. There are over a hundred different sequences and to complicate things further, manufacturers tend to each choose their own acronyms!