3D X-RAY DEVICE AND A METHOD FOR PRODUCING A 3D X-RAY IMAGE

• Main Authors: Blecher, Wolf, Ulrici, Johannes, Stannigel, Kai
• Format: Patent
• Language: English; Finnish
• Published: 23.05.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; DIAGNOSIS; GAMMA RAY OR X-RAY MICROSCOPES; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; IRRADIATION DEVICES; MEDICAL OR VETERINARY SCIENCE; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; SURGERY; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR

The invention relates to a 3D X-ray device (1) comprising an X-ray detector (2), an X-ray source (3) and a computer (4), wherein the X-ray detector (2) and the X-ray source (3) are moved about an object volume (6) to be recorded on movement paths (5, 7) with a rotation of at least 185°, wherein a plurality of X-ray projection images are recorded from different irradiation directions (8), whereby X-rays (9), which are produced by means of the X-ray source (3), irradiate the object volume (6) in one of the irradiation directions (8) and are captured by the X-ray detector (2), wherein a 3D X-ray image (10) of the object volume (6) is calculated from the recorded X-ray projection images by means of a reconstruction method. The X-ray detector (2) is arranged asymmetrically relative to a central axis (12) through a center of rotation (13) of the 3D X-ray device (1), wherein a first fan beam (14) and an opposite second fan beam (17) rotated 180° form an overlap region (18), wherein at least one X-ray filter (21) is disposed between the X-ray source (3) and the object volume (6) for attenuating an X-ray dose inside the overlap region (18).