Synchronization of two image sequences of a periodically moving object

摘要

A method and an apparatus for correlating two image sequences of a periodically moving object with respect to the periodicity is described. A first frame sequence of the object moving with the first periodicity is acquired. Therein the first frame sequence comprises at least one cycle of motion. A second frame sequence of the object moving with the second periodicity is acquired. Therein the second frame sequence comprises at least one cycle of motion. The first and the second frame sequences are synchronized with respect to the respective periodicity such that same phases of motion of the periodically moving object are correlated to be presented simultaneously. The present invention allows to compare sequences representing a periodical motion with a different number of frames in each of the sequences for the same cycle of motion. Thereby, e.g. image sequences of a beating heart acquired before and after a therapy may be presented in a synchronized way and therefore may be easily compared.

主权项

1. An imaging apparatus configured for correlating two image sequences of a periodically moving object with respect to the periodicity, said apparatus comprising:
an imaging acquisition processor configured for acquiring:
a first frame sequence of the object moving with a first periodicity, said first frame sequence comprising at least one cycle of motion; anda second frame sequence of the object moving with a second periodicity, said second frame sequence comprising at least one cycle of motion; and an imaging-frame-sequence synchronization processor for synchronizing the first and the second frame sequences with respect to the respective periodicity such that same phases of motion of the periodically moving object are correlated, said first frame sequence comprising two frames that match respective frames of said second frame sequence such that, between the two matching pairs of frames, a different number of frames exist for said first sequence than do for said second sequence, said synchronizing comprising equalizing the numbers by adding to the number of frames of the sequence with the smaller number of frames.