METHOD AND APPARATUS FOR PROVIDING TWO DIGITAL PANORAMIC LAYER IMAGES

• US 20170354388A1
• Filed: 11/23/2015
• Published: 12/14/2017
• Est. Priority Date: 11/21/2014
• Status: Active Grant

• Current Assignee: Dentsply Sirona INC. (Astrazeneca PLC)
• Original Assignee: Dentsply Sirona INC. (Astrazeneca PLC)
• Inventors: LINDENBERG, Kai
• Granted Patent: US 10,456,096 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/4266 characterised by using a plurality of detector units A61B6/4014 takes precedence
• CPC Class Codes: A61B 6/51 for dentistry

Abstract

The invention relates to a method for providing a first and a second digital panoramic layer image optimized for a comparison, wherein the first and second panoramic layer images each have multiple projections detected and stored for them by means of at least one digital detector during an at least partial revolution of a recording unit around an object to be recorded, and the first and second panoramic layer images are each produced from the multiple projections in accordance with a computation code and by forming a panoramic layer. Differences between the first and second panoramic layer images are minimized by altering at least one parameter of the computation code for fresh production of the first and/or second panoramic layer image. In addition, the invention relates to a corresponding apparatus.

Claims

1. Method for providing a first and a second digital panoramic layer image, the method comprising detecting and storing multiple projections of the first and second panoramic layer images with at least one digital detector during at least one partial revolution of a recording unit around an object to be recorded, and producing the first and second panoramic layer images multiple projections in accordance with a computation rule and forming a panoramic layer, wherein differences between the first and second panoramic layer images are minimized due to variation of at least one parameter of the computation rule in case of a new production of the first and/or second panoramic layer images.

2. Method according to claim 1, wherein the parameter to be changed is a position and/or a shape of the panoramic layer.

3. Method according to claim 2, wherein the position of the panoramic layer is altered with regard to three translation and three rotation axes.

4. Method according to claim 2, wherein the shape of the panoramic layer is advantageously altered by a spreading and/or compression and/or scaling.

5. Method according to claim 1, wherein the differences are minimized an optimization method.

6. Method according to claim 5, wherein the optimization method is a brute force method, or a gradient method, or a structure search method.

7. Method according to claim 1, wherein the panoramic layer is varied in at least two different areas of the panoramic layer image.

8. A device for providing a first and a second digital panoramic layer image, the device comprising a calculation unit, a dental x-ray device having an x-ray source and at least one digital x-ray detector that can respectively be moved at least partially around a recording space, and means for transmitting projections detected with the detector to the calculation unit, wherein the calculation unit is designed to produce the first and second panoramic layer images respectively from multiple projections detected during a revolution, according to a computation rule and with formation of a panoramic layer, wherein the calculation unit is capable of executing the method according to claim 1.