US 10,702,220 B2 · Tomography system and method for producing a series of volume images of a vascular system

Abstract

The invention relates to a tomography system (TA) comprising a first (QD1) and a second (QD2) beam source-detector pair for capturing one series (A1, A2) of projection image data sets (PB1, PB2) each from one projection angle (W1, W2) each and a volume image production system (VE) for producing a series (AV) of volume images (VB) of a vascular system (GS) while taking into account first confidence values (VW1) of the first pixel values (PW1) and/or while taking into account second confidence values (VW2) of the second pixel values (PW2). The confidence value (VW1, VW2) of a pixel value (PW1, PW2) depends on a pixel-specific traversing length (L) that a projection beam (PS1, PS2) traverses on a path through parts (Gi) of the vascular system (GS) from the first (Q1) or the second (Q2) beam source to a pixel-specific sensor element (S) of the associated first (D1) or second (D2) detector. The invention further relates to a corresponding method (100) for producing a series (AV) of volume images (VB) of a vascular system (GS).

Claims15

Dependent claims

A tomography system comprising:

a first beam source-detector pair configured to capture a series of first projection image data sets containing first pixel values from a first projection angle;
a second beam source-detector pair configured to capture a series of second projection image data sets containing second pixel values from a second projection angle, wherein the two projection angles are different from each other;
and
a volume image production system configured to determine voxel values for a series of volume images of a vascular system by calculating a weighted average value for a respective voxel from pixel values of first- and second-pixels values of the projection beams that intersect in the respective voxel;
wherein a confidence value of a first pixel value is used as a weight of the first pixel value and a confidence value of a second pixel value is used as a weight of the second pixel value to calculate the weighted average value;
wherein the confidence values are determined as a function of a length of the vascular system that is traversed by a respective projection beam from a respective beam source through a respective pixel to the respective detector.

3 more elements

A method for producing a series of volume images of a vascular system, the method comprising:

capturing a series of first projection image data sets containing first pixel values from a first projection angle;
capturing a series of second projection image data sets containing second pixel values from a second projection angle, wherein the second projection angle is different from the first projection angle;
calculating a weighted average value for a respective voxel from pixel values of first- and second-pixels values of the projection beams that intersect in the respective voxel, wherein a confidence value of the first pixel value is used as a weight of the first pixel value and a confidence value of the second pixel value is used as a weight of the second pixel value to calculate the weighted average value, wherein the confidence values are determined as a function of a length of the vascular system that is traversed by a respective projection beam from a respective beam source through a respective pixel to the respective detector;
and
producing the series of volume images using voxel values determined as a function of the weighted average values.

2 more elements

Dependencies are inferred from the claim text.

Tomography system and method for producing a series of volume images of a vascular system

Life of this patent

Tomography system and method for producing a series of volume images of a vascular system

Life of this patent

Abstract

Claims15