| 摘要 |
FIELD: physics.SUBSTANCE: when performing repetitive scans on a patient using a magnetic resonance imaging machine or the like, patients often tend to move as they relax during a lengthy scanning session, causing movement in the volume or portion of the patient being scanned. A prospective motion correction component accounts for patient movement by calculating transformation data characterising patient movement in multiple planes, as well as rotational movement, and a host evaluates the change in position relative to a most recent scanning geometry of the patient or dynamic volume. In this manner, correction or adjustment to the scanning geometry employed by an associated scanner is made only for the difference between the current geometry and the most recent geometry in order to exclude redundant adjustment that can result in oscillatory over- and under-compensation during adjustments.EFFECT: cutting scanning time and improving quality of scanning with real time motion correction.23 cl, 10 dwg |
