WED determination spatially-resolved in the head-foot direction
AssigneeSiemens Healthcare GmbH
InventorKarlheinz Dorn
Life of this patent
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Abstract
In at least one embodiment, X-ray images of a human examination object acquired via X-ray equipment are each spatially-resolved in a plurality of dimensions. In each case, one dimension extends in the head-foot direction of the examination object. The respective body region is detected in the X-ray images in steps that are equidistant in the head-foot direction and, based on this, the water-equivalent diameter of the examination object is determined in a plane orthogonal to the head-foot direction. The water equivalent diameters determined for each respective position is stored with allocation to the X-ray images and the respective position in the head-foot direction.
Claims14
An evaluation method for a number of X-ray images of a human examination object acquired via X-ray equipment, the evaluation method comprising:
- spatially resolving each of the X-ray images in exactly two dimensions, including images of arms of the human examination object, wherein, based on the human examination object, one dimension of the two dimensions extends in a head-foot direction and a further dimension of the two dimensions extends from left to right;
- detecting, in each case, a respective body region in the X-ray images in steps equidistant in the head-foot direction;
- determining, based on the detecting, water-equivalent diameters of the human examination object in a plane orthogonal to the head-foot direction;
- and
- storing the water-equivalent diameters determined for each respective position with allocation to the X-ray images and to each respective position in the head-foot direction, wherein the images of the arms of the human examination object are removed from the X-ray images before the determining of the water-equivalent diameters, wherein, following the spatially resolving of the X-ray images via the X-ray equipment, a three-dimensional scan of the human examination object is carried out, wherein the water-equivalent diameters of the human examination object, determined using two-dimensional X-ray images of the X-ray images spatially resolved in exactly two dimensions, are used during the three-dimensional scan in conjunction with settings of the X-ray equipment when performing the three-dimensional scan in order to determine a dose value based on a size of the human examination object, and wherein, during the determining of the water-equivalent diameters of the human examination object, a position of an examination table within a plane oriented orthogonally to the head-foot direction is considered.
An arithmetic device, comprising:
- at least one processor configured to
- spatially resolve X-ray images in exactly two dimensions, including images of arms of a human examination object, wherein, based on the human examination object, one dimension of the two dimensions extends in a head-foot direction and a further dimension of the two dimensions extends from left to right;
- detect, in each case, a respective body region in the X-ray images in steps equidistant in the head-foot direction;
- determine, based on the respective body region detected, water-equivalent diameters of the human examination object in a plane orthogonal to the head-foot direction;
- and
- store the water-equivalent diameters determined for each respective position with allocation to the X-ray images and to each respective position in the head-foot direction, wherein the images of the arms of the human examination object are removed from the X-ray images before determining the water-equivalent diameters, wherein, following the spatially resolving of the X-ray images, a three-dimensional scan of the human examination object is carried out;
- wherein the water-equivalent diameters of the human examination object, determined using two-dimensional X-ray images of the X-ray images spatially resolved in exactly two dimensions, are used during the three-dimensional scan in conjunction with settings of X-ray equipment when performing the three-dimensional scan in order to determine a dose value based on a size of the human examination object;
- and wherein, during the determining of the water-equivalent diameters of the human examination object, a position of an examination table within a plane oriented orthogonally to the head-foot direction is considered.
Dependencies are inferred from the claim text.