Method for reconstructing x-ray image data, method for providing a trained model, processing device, x-ray apparatus, computer program, and data storage medium

A method for providing a model trained by machine learning for use as an analysis algorithm or as a sub-algorithm of the analysis algorithm, the method being computer-implemented and comprising:

• receiving a plurality of training datasets, each training dataset of the plurality of training datasets comprising, as input data, a plurality of X-ray images of a particular patient, each X-ray image of the plurality of X-ray images depicting at least part of a relevant segment of a vascular system of the particular patient, and as a target result, a definition of a three-dimensional relevant region, inside which the relevant segment of the vascular system of the patient is located;
• training a model based on the plurality of training datasets, such that the model trained by machine learning is determined;
• and
• providing the model trained by machine learning.

A processing device comprising:

• a processor configured to reconstruct three-dimensional or four-dimensional X-ray image data, the processor being configured to reconstruct the three-dimensional or four-dimensional X-ray image data comprising the processor being configured to:
• receive a first group of two-dimensional X-ray images, each of the two-dimensional X-ray images of the first group depicting at least part of a relevant segment of a vascular system of a patient;
• automatically determine a three-dimensional relevant region of the patient that comprises the relevant segment of the vascular system of the patient, the automatic determination comprising processing of the two-dimensional X-ray images from the first group by an analysis algorithm;
• reconstruct the three-dimensional or four-dimensional X-ray image data based on the first group of the two-dimensional X-ray images, a received second group of X-ray images of the patient, or a combination thereof, such that all voxels of the three-dimensional or four-dimensional X-ray image data are located inside the determined three-dimensional relevant region.

An X-ray apparatus comprising:

• an X-ray source;
• an X-ray detector configured to determine X-ray images of a patient;
• and
• a processor configured to reconstruct three-dimensional or four-dimensional X-ray image data, the processor being configured to reconstruct the three-dimensional or four-dimensional X-ray image data comprising the processor being configured to:
• receive a first group of two-dimensional X-ray images, each of the two-dimensional X-ray images of the first group depicting at least part of a relevant segment of a vascular system of a patient;
• automatically determine a three-dimensional relevant region of the patient that comprises the relevant segment of the vascular system of the patient, the automatic determination comprising processing of the two-dimensional X-ray images from the first group by an analysis algorithm;
• reconstruct the three-dimensional or four-dimensional X-ray image data based on the first group of the two-dimensional X-ray images, a received second group of X-ray images of the patient, or a combination thereof, such that all voxels of the three-dimensional or four-dimensional X-ray image data are located inside the determined three-dimensional relevant region.

In a non-transitory computer-readable storage medium that stores instructions executable by one or more processors to reconstruct three-dimensional or four-dimensional X-ray image data, the instructions comprising:

• receiving a first group of two-dimensional X-ray images, each of the two-dimensional X-ray images of the first group depicting at least part of a relevant segment of a vascular system of a patient;
• automatically determining a three-dimensional relevant region of the patient that comprises the relevant segment of the vascular system of the patient, the automatically determining comprising processing the two-dimensional X-ray images from the first group by an analysis algorithm;
• and
• reconstructing the three-dimensional or four-dimensional X-ray image data based on the first group of the two-dimensional X-ray images, a received second group of X-ray images of the patient, or a combination thereof, such that all voxels of the three-dimensional or four-dimensional X-ray image data are located inside the determined three-dimensional relevant region.