Deriving a cross-sectional distribution from an object data set
AssigneeU.S. Philips Corporation
InventorsJan Timmer, Jantje Edith Wilting
Life of this patent
Estimating the term…
Abstract
A cross-sectional distribution along a cutting plane is derived from an object data set of data values. The cross-sectional distribution comprises density values. The density values are calculated from data values of the object data set in positions outside the cutting plane. The object data set represents an object to be examined and is, for example, acquired by way of volumetric computed tomography or magnetic resonance imaging. For example, the density values of the cross-sectional distribution are calculated by local (slab) MIP or mIP or by interpolation.
Claims9
A method of deriving a cross-sectional distribution of density values from an object data set of data values, wherein
- the object data set associates data values with positions in three dimensions and represents an object,
- the cross-sectional distribution associates density values with positions in a cutting plane, and
- the cross-sectional distribution represents a cross-section along the cutting plane through the three-dimensional object, characterized in that
- data values of the object data set in positions near and outside the cutting plane are used to calculate density values of the cross-sectional distribution.
A computed tomography device which includes
- an X-ray source for irradiating an object by means of X-rays from different axial directions, and
- an X-ray detector
- wherein the X-ray detector and the X-ray source and the object can be displaced relative to one another in a longitudinal direction, and
- the X-ray detector is arranged to measure a plurality of density profiles for respective axial directions and longitudinal positions, which density profiles form an object data set of data values,
- which computed tomography device includes a data processing unit for
- deriving a cross-sectional distribution of density values from the object data set, which cross-sectional distribution associates density values with positions in a cutting plane and represents a cross-section through the object along a cutting plane having a given position and orientation, characterized in that
- the data processing unit is arranged to calculate the density values of the cross-sectional distribution from data values of the object data set in positions near the cutting plane.
A computer program with instructions for deriving a cross-sectional distribution of density values from an object data set of data values, wherein
- the object data set associates data values with positions in three dimensions and represents an object,
- the cross-sectional distribution associates density values with positions in a cutting plane, and
- the cross-sectional distribution represents a cross-section through the three-dimensional object along the cutting plane, and
- data values of the object data set in positions near and outside the cutting plane are used to calculate density values of the cross-sectional distribution.
Dependencies are inferred from the claim text.