US 10,376,231 B2
Method of reducing the x-ray dose in an x-ray system
Henrik Öjelund, Kgs. Lyngby (DK)
Assigned to 3Shape A/S, Copenhagen K (DK)
Appl. No. 15/561,739
Filed by 3Shape A/S, Copenhagen K (DK)
PCT Filed Mar. 23, 2016, PCT No. PCT/EP2016/056387
§ 371(c)(1), (2) Date Sep. 26, 2017,
PCT Pub. No. WO2016/156150, PCT Pub. Date Oct. 6, 2016.
Claims priority of application No. 2015 70179 (DK), filed on Mar. 27, 2015.
Prior Publication US 2018/0085084 A1, Mar. 29, 2018
Int. Cl. G06K 9/00 (2006.01); A61B 6/00 (2006.01); A61B 6/03 (2006.01); A61B 6/04 (2006.01); A61B 6/14 (2006.01); A61B 5/11 (2006.01); A61B 5/00 (2006.01)
CPC A61B 6/542 (2013.01) [A61B 5/1127 (2013.01); A61B 5/721 (2013.01); A61B 6/032 (2013.01); A61B 6/0457 (2013.01); A61B 6/0492 (2013.01); A61B 6/14 (2013.01); A61B 6/469 (2013.01); A61B 6/488 (2013.01); A61B 6/501 (2013.01); A61B 6/545 (2013.01); A61B 6/547 (2013.01); A61B 6/486 (2013.01); A61B 6/582 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of obtaining medical images of a patient using a medical imaging device, the method comprising:
defining a region of interest of the patient;
obtaining at least two tracking images of a tracking element taken with at least one camera having a known positional relationship relative to a radiation source or sensor;
determining any movement of the tracking element between the acquisition of at least two tracking images;
adjusting the medical imaging device based on the determined movement of the tracking element between the acquisition of the at least two tracking images so that the radiation passes through the region of interest; and
obtaining at least one medical image of the region of interest after the adjustment of the medical imaging device,
wherein determining any movement of the tracking element between the acquisition of at least two tracking images comprises:
recognizing a plurality of fiducial markers in each tracking image;
obtaining a digital representation in a database of the known predefined pattern or shape of the fiducial markers; and
recognizing the pattern of the fiducial markers in each image to achieve a best fit to the known predefined pattern of the fiducial markers on the tracking element from each tracking image.