US 12,405,230 B2
Procedure for generating the data for the reconstruction of a volume in a flat object using an X-ray system
Mareike Töpperwien, Hamburg (DE); and André Beerlink, Hamburg (DE)
Assigned to Comet Yxlon GmbH, Hamburg (DE)
Filed by Comet Yxlon GmbH, Hamburg (DE)
Filed on Mar. 14, 2023, as Appl. No. 18/121,380.
Claims priority of application No. 10 2022 105 963.4 (DE), filed on Mar. 15, 2022.
Prior Publication US 2023/0296534 A1, Sep. 21, 2023
Int. Cl. G01N 23/04 (2018.01); G01N 23/083 (2018.01)
CPC G01N 23/04 (2013.01) [G01N 23/083 (2013.01); G01N 2223/3307 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A procedure for generating the data for the reconstruction of a volume in a flat object (4) using an X-ray system, which has three imaging components, namely a tube (1), a detector (3) and an object (4) located between them, wherein the tube (1) has a focus (2), which, in a central position of the tube (1), forms the coordinate origin of a first Cartesian coordinate system, and emits a cone beam (10), the centre ray (14) of which forms the z axis of the first coordinate system and the x axis runs horizontally,
wherein, in a central position of the detector (3), the centre ray (14) strikes the detector (3) perpendicularly and this point of impact forms the origin of a second Cartesian coordinate system, the zd axis of which, in the central position of the detector (3), is identical to the z axis in the central position of the tube (1) and the xd axis runs horizontally,
wherein, in a neutral position (5) of the object (4), the object (4) has a third Cartesian coordinate system, the origin of which is the intersection between the centre ray (14) of the central position of the tube (1) and a vertically running axis of rotation of the object (4), the zo axis of which, in its neutral position (5), coincides with the centre ray (14) in the central position of the tube (1) and the xo axis of which, in its neutral position (5), runs parallel to the x axis in the central position of the tube (1),
wherein at least two of the three imaging components are movable along their respective y axis, thus the tube (1) along they axis according to its central position, the detector (3) along the yd axis according to its central position, the object (4) along the yo axis according to its neutral position (5),
wherein the object (4) is movable along the xo axis according to its neutral position (5) and rotatable about the yo axis according to its neutral position (5),
passing through a vertical trajectory with the following steps:
a1) moving at least two of the three imaging components into a configuration in which at least two of the three imaging components are located outside the basic position, the z, zo and zd axes run parallel to each other, the x, xo and xd axes run parallel to each other and there is a first swivel angle θu between a central ray (11) and the z axis in the yz plane, wherein the detector (3) has a yd1 coordinate and the tube (1) has a y1 coordinate, wherein a central ray (11) strikes the detector (3) at the origin of the second Cartesian coordinate system;
b1) then moving the object (4) along the yo axis from a first extreme point to a second extreme point, wherein X-ray images, which are stored in a storage medium, are made at predefinable distances along the movement, wherein the first extreme point has a yo1 coordinate and the second extreme point has a yo2 coordinate, wherein the object (4) has passed at least partially through the X-ray;
c1) then moving at least two of the three imaging components into a configuration in which at least two of the three imaging components are located outside the basic position, the z, zo and zd axes run parallel to each other, the x, xo and xd axes run parallel to each other and there is a second swivel angle θo between a central ray (11) and the z axis in the yz plane, wherein the detector (3) has a yd2 coordinate and the tube (1) has a y2 coordinate and the central ray (11) strikes the detector (3) at the origin of the second Cartesian coordinate system and wherein y2≠y1 and yd2≠yd1;
d1) then moving the object (4) along the yo axis from a third extreme point to a fourth extreme point, wherein X-ray images, which are stored in a storage medium, are made at predefinable distances along the movement,
wherein the third extreme point has a yo3 coordinate and the fourth extreme point has a yo4 coordinate, wherein the object (4) has passed at least partially through the X-ray;
passing through a horizontal trajectory with the following steps:
e1) moving the tube (1), the detector (3) and the object (4) into a configuration in which the tube (1) and the detector (3) are located in their respective central position and the object (4) is located in its neutral position (5);
f1) then rotating the object (4) out of its neutral position (5) by a first angle of rotation βl about the yo axis and moving the object (4) parallel to the x axis of the tube (1) in its central position from a fifth extreme point to a sixth extreme point, wherein X-ray images, which are stored in a storage medium, are made at predefinable distances along the movement, wherein the fifth extreme point has an xo1 coordinate and the sixth extreme point has an xo2 coordinate, wherein the object (4) has passed at least partially through the X-ray;
g1) then rotating the object (4) by a second angle of rotation βr, wherein βr≠βl, about the yo axis and moving the object (4) parallel to the x axis of the tube (1) in its central position from a seventh extreme point to an eighth extreme point, wherein X-ray images, which are stored in a storage medium, are made at predefinable distances along the movement, wherein the seventh extreme point has [about] an xo3 coordinate and the eighth extreme point has an xo4 coordinate, wherein the object (4) has passed at least partially through the X-ray.