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US 2018/0322665 A1Published application
Dynamic Image Data Treatment in Dental Imaging Devices
AssigneeTrophy
InventorsVincent Loustauneau, Chloe Abdoul Carime Comparetti, Anna-Sesilia Vlachomitrou
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Abstract
Improved image reconstruction for an extra-oral imaging system that includes scan imaging capabilities such as cephalometric imaging. Exemplary method and/or apparatus embodiments according to the application can to implement a dynamic cropping for an active area for each frame used in image reconstruction that was obtained during a scan imaging.
Claims20
A method of x-ray imaging of a region of interest of a patient with an x-ray apparatus comprising:
- an x-ray source to emit an x-ray beam;
- at least one collimator to shape the x-ray beam;
- an x-ray imaging device including a plurality of detection elements arrayed in the width direction and the length direction to receive the shaped x-ray beam;
- a storing unit configured to store at least one trajectory for the collimator and for at least one of said x-ray source and said x-ray imaging device for a scan imaging;
- a manipulator to displace an aperture of said at least one collimator and at least one of said x-ray source and said x-ray imaging device along said at least one trajectory;
- and
- an image reconstruction unit;
- the method comprising:
- performing a first scan imaging of a region of interest of a patient with the aperture of the at least one collimator and the at least one of said x-ray source and said x-ray imaging device following a first scan trajectory of said at least one stored trajectory;
- collecting a plurality of frames from said first scan imaging of the region of interest of said patient;
- determining a location of at least one edge of an irradiated area on at least one frame of the region of interest of said patient from said plurality of frames from said first scan imaging;
- establishing an edge position curve relative to the first scan imaging of the region of interest of said patient;
- cropping selected frames of said plurality of frames from said first scan imaging on the basis of said edge position curve;
- calculating an actual exposure profile relative to the first scan imaging of the region of interest of said patient;
- and
- reconstructing the region of interest of said patient by combining said cropped selected frames using said actual exposure profile.
13 more elements
An X-ray apparatus to image a region of interest of an imaging area of the apparatus comprising:
- an x-ray source to emit an x-ray beam;
- at least one collimator to shape the x-ray beam;
- an x-ray imaging device including a plurality of detection elements arrayed in the width direction and the length direction to receive the shaped x-ray beam;
- a storing unit configured to store at least one trajectory for the collimator and for at least one of said x-ray source and said x-ray imaging device for a scan imaging;
- a manipulator to displace an aperture of said at least one collimator and at least one of said x-ray source and said x-ray imaging device along said at least one trajectory;
- and
- an image reconstruction unit;
- the apparatus being able to:
- perform a first scan imaging of a region of interest of an imaging area with the aperture of the at least one collimator and the at least one of said x-ray source and said x-ray imaging device following a first scan trajectory of said at least one stored trajectory;
- collect a plurality of frames from said first scan imaging of the region of interest of said imaging area;
- determine a location of at least one edge of an irradiated area on at least one frame of the region of interest of said imaging area from said plurality of frames from said first scan imaging;
- establish an edge position curve relative to the first scan imaging of the region of interest of said imaging area;
- crop selected frames of said plurality of frames from said first scan imaging on the basis of said edge position curve calculate an actual exposure profile relative to the first scan imaging of the region of interest of said imaging area;
- and
- reconstruct the region of interest of said imaging area by combining said cropped selected frames using said actual exposure profile.
12 more elements
Dependencies are inferred from the claim text.