<div dir="ltr">Dear MRtrix list,<div><br></div><div>My HARDI sequence is frequently contaminated by slices with collapsed signal. This happens in 2-3 slices of 61 volumes. Slices and volumes affected are a bit random, not always the same.</div>
<div><br></div><div>In concomitance I see shifts in anterior-posterior (phase) direction from one volume to the other. I have been told this may happen because gradients heat to much.</div><div><br></div><div>My question at this point is:anybody had the same experience with slice dropouts?</div>
<div><br></div><div>Do you think slice dropouts are related to the b-value. Would decreasing b from 3000 to 2500 make a difference? Could slices collapse because of motion causing bigger artifacts with high b-values?</div>
<div><br></div><div>Finally, do you think the slice collapse is related to the anterior-posterior shift (gradient heating) problem?</div><div><br></div><div>Any comment may be useful.</div><div>Thank you.</div><div><br></div>
<div>Dorian</div><div>TJU</div></div>