METHOD AND SYSTEM FOR DETERMINING A RESPIRATORY PHASE

摘要

A method is for determining a respiratory phase is based on receiving tomographic raw data on the basis of a spiral scan of an examination region of a patient, the examination region including at least part of the torso and/or abdomen of the patient. Slice image pairs are reconstructed on the basis of the tomographic raw data, wherein a slice image pair includes two slice images having a first interval at an identical position along a predefined axis. The position refers to the position of the examination region. This enables determining of differences between reference positions of the examination region in two slice images respectively of a slice image pair and determining a respiratory phase on the basis of the differences. The differences correspond in each case to the change in the anatomy of the examination region, wherein this change occurs during the first interval.

主权项

1. A method for determining at least one respiratory phase, comprising:
receiving tomographic raw data based on a spiral scan of an examination region of a patient, the examination region including at least part of at least one of the torso and the abdomen of the patient; reconstructing slice image pairs on the basis of the tomographic raw data, the slice image pairs each including two slice images having a first interval at an identical position along an axis; and determining respective differences between reference positions of the examination region in two respective slice images of the slice image pairs, and determining at least one respiratory phase on the basis of the differences.