Title:
断層撮影Ｘ線画像再構成
Document Type and Number:
Japanese Patent JP6991357
Kind Code:
B2
Abstract:
Cone beam computed tomography image acquisition protocols typically acquire a series of 2D projection images around a region of interest of a patient. The time required for a C-arm to travel around an acquisition orbit around the region of interest of a patient is non-trivial, and as a result, a patient being imaged may move during the acquisition. This is problematic because many computed tomography image acquisition algorithms assume that a patient is perfectly still during the acquisition time. If patient moves as the series of 2D projection images is being obtained, a 3D reconstruction will be affected by image artefacts.This application proposes to identify and to remove image artefacts caused by the relative motion of at least two rigid objects in the region of interest (For example, a mandible moving with respect to a skull during the acquisition). The at least two rigid objects have a more predictable motion characteristic, which may be used to correct 2D images of the input projection image sequence before a final reconstruction step. Accordingly, 3D images of a patient may be provided with fewer artefacts even when a patient moves during an acquisition.
Inventors:
Hase Christian
Glass michael
Schaefer Dark
Glass michael
Schaefer Dark
Application Number:
JP2020551575A
Publication Date:
January 12, 2022
Filing Date:
March 18, 2019
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
A61B6/02
Domestic Patent References:
| JP2014237005A | ||||
| JP2007152118A | ||||
| JP2013192695A | ||||
| JP11253433A |
Foreign References:
| US20060067464 |
Attorney, Agent or Firm:
Patent Services Corporation m&s Partners