Method and System for Controlling Computer Tomography Imaging

Patent metadata

Field	Value
Publication number	US-2016206275-A1
Application number	US-201514973206-A
Country	US
Kind code	A1
Filing date	Dec 17, 2015
Priority date	Sep 8, 2010
Publication date	Jul 21, 2016
Grant date	—

Abstract

A method, a device, a system and a computer program are for controlling limited-area computer tomography imaging. The method includes determining location data of a first imaging object when the first imaging object is positioned in an imaging area, determining reference location data related to the first imaging object and adjusting the imaging area based on the location data of the first imaging object and said reference location data for imaging a second imaging object. The first and the second imaging object can be located at a distance determined by the reference location data from each other or symmetrically in relation to the reference location data.

First claim

1 - 15 . (canceled)

16 . A method for controlling limited-area computer tomography imaging,
comprising: determining a reference location data of an object to be imaged; obtaining location data of a first imaging object within the object to be imaged; determining a location of the first imaging object based upon the location data of the first imaging object in relation to the reference location data; computer-tomography imaging a first imaging area about the first imaging object; determining location data of a second imaging object based on the location data of the first imaging object and the reference location data; computer-tomography imaging a second imaging area about the second imaging object.

17 . The method of claim 16 wherein the reference location data comprises a center plane of the object to be imaged.

18 . The method of claim 17 , further comprising:
measuring a distance across the object to be imaged; and determining the reference location data from the measured distance.

19 . The method of claim 18 , further comprising:
supporting the object to be imaged with an object positioning means comprising at least two support elements adapted to support opposing sides of the object to be imaged; measuring a distance between the at least two support elements, where the distance between the at least two support elements is the distance across the object to be imaged.

20 . The method of claim 19 , wherein the object to be imaged is a head of a patient and further the at least two support elements further comprise at least one support element adapted to engage at least one of a jaw and a back of the head of the patient and at least one support element adapted to engage at least one of a forehead or a crown of the head of the patient, the method comprising:
determining at least one of a height and a depth of the head of the patient by measuring a distance between the support elements; determining the reference location data as a plane through the head of the patient.

21 . The method of claim 18 , further comprising:
capturing an optical image of the object to be imaged with a camera, wherein measuring the distance across the object to be imaged comprise measuring a distance across the optical image of the object to be imaged.

22 . The method of claim 21 , further comprising:
acquiring a distance between the camera and the object to be imaged; and determining the reference location data further based upon the acquired distance between the camera and the object to be imaged.

23 . The method of claim 16 , wherein the location data of the first imaging object defines a center of the first imaging object.

24 . The method of claim 23 , wherein the location data of the first imaging object is a distance and an angle from a point defined by the reference location data.

25 . The method of claim 2416 , wherein the reference location data defines a plane of symmetry of the object to be imaged and the location data of the second imaging object is a mirror representation of the location data of the first imaging object across the plane of symmetry of the object to be imaged.

26 . The method of claim 16 , further comprising:
supporting the object to be imaged with an object positioning means comprising at least one support element adapted to engage the object to be imaged such that the object remains stationary relative to the reference location data.

27 . The method of claim 16 , further comprising:
positioning an x-ray emitter and an x-ray collector about a rotation axis; rotating the x-ray emitter and the x-ray collector about the rotation axis to computer-tomography image the first imaging area; and dynamically collimating an x-ray beam produced by the x-ray emitter to computer-tomography image the second imaging area.

28 . The method of claim 16 , further comprising:
positioning an x-ray emitter and an x-ray collector at about a rotation axis; during computer-tomography imaging to computer-tomography image both the first imaging object and the second imaging object:
rotating the x-ray emitter and the x-ray collector about the rotation axis; and
dynamically collimating an x-ray beam produced by the x-ray emitter to computer-tomography image the first imaging object and the second imaging object.

29 . The method of claim 28 , wherein the reference location data comprises a center plane of the object to be imaged and the rotation axis is centered on the center plane.

30 . The method of claim 28 , wherein the reference location data comprises a center plane of the object to be imaged and the rotation axis is located on a side of the center plane towards the first imaging object, the method further comprising:
while rotating the x-ray emitter and the x-ray collector about the rotation axis, moving the rotation axis in a direction across the center plane of the object to be imaged towards the second imaging object.

31 . A system for limited-area computer tomography imaging, the apparatus comprising:
an x-ray emitter configured to produce a beam of x-rays; an x-ray collector configured to receive x-rays having passed through an object to be imaged; and a control apparatus communicatively connected to the x-ray emitter and the x-ray collector, the control apparatus determines a reference location of the object to be imaged, obtains location data of a first imaging object within the object to be imaged, determines a location of the first imaging object based upon the location data of the first imaging object in relation to the reference location data, operates the x-ray emitter and the x-ray collector to computer-tomography image a first imaging area about the first imaging object, determines location data of a second imaging object based on the location data of the first imaging object and the reference location data, and operates the x-ray emitter and the x-ray collector to computer-tomography image a second imaging area about the second imaging object.

32 . The system of claim 31 , further comprising at least two support elements configured to engage the object to be imaged, wherein the at least two support elements support the object to be imaged during computer-tomography imaging of the first imaging object and the second imaging object.

33 . The system of claim 32 , wherein the control apparatus acquires a position of the at least two support elements and determines the reference location as a center plane through the object to be imaged based upon the acquired position of the at least two support elements.

34 . The system of claim 31 , further comprising a camera that acquires an optical image of the object to be imaged and provides the optical image to the control apparatus, and the control apparatus determines the reference location as a center plane through the object to be imaged based upon the optical image.

35 . The system of claim 31 , wherein the x-ray emitter further comprises a dynamic collimator and the control apparatus operates the x-ray emitter and the x-ray collector to rotate about a rotation axis while collimating an x-ray beam produced by the x-ray emitter with the dynamic collimator to computer tomography image the first imaging area and the second imaging area.

Assignees

• Palodex Group Oy

Inventors

• Jouhikainen Petri

Classifications

• A61B6/032 Primary

  Transmission computed tomography [CT] · CPC title

• A61B6/14

  Human Necessities · mapped topic

• A61B6/545 Primary

  involving automatic set-up of acquisition parameters · CPC title

• G06T7/0012

  Biomedical image inspection · CPC title

• A61B6/51

  for dentistry · CPC title