Enhanced Fine Line Suppression

Fine Line artifacts are often seen in odd NEX scans and result from unsuppressed FID signals. Use the Fine Line Suppression control variable to reduce this type of artifact with odd NEX FSE scans.

• Enter 0 to turn off (default state). It applies gradients in a particular manner for all 2D FSE prescriptions, is independent of the NEX selection, has a FOV and slice thickness cutoff (FOV </= 20 cm and slice thickness </= 6 mm), and 10% of the readout window is blanked out for true odd NEX scans.
• Enter 1 to turn on and increase certain gradient pulses for true odd NEX scans thus improving the reduction of fine line artifact on odd NEX scans. When turned on with odd NEX scans, it can result in a longer echo spacing (no more than 10%) and thus a reduction of slices per TR. This becomes apparent when switching between odd and even NEX since these trade-offs are not seen with even NEX scans. If the User CV Blurring Cancellation is turned on, the new version of enhanced Fine Line Suppression will always be used, independent of the choice of NEX. In other words, there will be no changes to the echo spacing or number of slices per TR with NEX.