<div dir="ltr">Dear experts,<div><br></div><div style>Below is a picture from 3 DTI sequences during the same MRI acquisition on a subject As you can see the fat shift didn't work properly, showing fat rings. This ring seem to alternate for some slices, clearly visible in DWI fitting error. Does this mean that fat shift problems interact with eddy currents to produce alternating rings or is it just normal that fat ring alternates between diffusion directions?</div>
<div style><br></div><div style>Second, this is somehow a naive and unrelated question. Given that I obtain always 2+ datasets from each subject, isn't there a way to invert fat suppression technique in the scanner such that one time I have a fat ring showing as dark, but in the next dataset the same volume have the ring brighter? This way the average of the fat ring will cancel out. Is there a way to invert, not the position, but the values from the fat so that the artifact would average theoretically to zero?</div>
<div style><br></div><div style>Thank you</div><div style><br></div><div style><br></div><div style>Figure with fat ring problem. Lower lines are the DWI fitting error images:</div><div style><br></div><div style><img src="http://img21.imageshack.us/img21/1974/3kj4.jpg" alt="Immagine in linea 1" width="567" height="320"><br>
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