Methods and devices for locating object in CT imaging

摘要

The present disclosure provides methods and devices for locating a plurality of interested objects in CT imaging. Location of the interested objects in the three-dimensional space can be determined by using three projection images that are substantially perpendicular to each other. The method can rapidly locate interested objects in a CT image without pre-reconstruction of the CT image even if there are a plurality of interested objects in the field of view. The algorithm does not involve interactive steps. The method is rapid and effective, and thus applicable to industrial applications.

主权项

1. A method for locating a plurality of interested objects in Computed Tomography (CT) imaging, comprising:
computing from projection data a first projection image at an observation direction perpendicular to a CT tomographic plane by means of a projection synthesis algorithm; selecting two projection images, referred as a second projection image and a third projection image, from a cone beam projection perpendicular to the observation direction, the second projection image being substantially orthogonal to the third projection image; determining locations of the plurality of interested objects in the first, second and third projection images; and computing locations of each of interested objects in the three-dimensional space based on the locations of the plurality of interested objects in the first, second and third projection images.