Title:
コンピュータ断層撮影スキャン
Document Type and Number:
Japanese Patent JP4499087
Kind Code:
B2
Abstract:
Artefacts in the reconstructed volume data of cone beam CT systems can be removed by the application of respiration correlation techniques to the acquired projection images. To achieve this, the phase of the patients breathing is monitored while acquiring projection images continuously. On completion of the acquisition, projection images that have comparable breathing phases can be selected from the complete set, and these are used to reconstruct the volume data using similar techniques to those of conventional CT. Any phase can be selected and therefore the effect of breathing can be studied. It is also possible to use a feature in the projection image(s) such as the patient's diaphragm to determine the breathing phase. This feature in the projection images can be used to control delivery of therapeutic radiation dependent on the patient's breathing cycle, to ensure that the tumour is in the correct position when the radiation is delivered.
Inventors:
Kevin, John, Brown
David, Jaffray
Jeffrey, Sewardsen
Marcel, fan, helck
Yang-Jakob, Songke
David, Jaffray
Jeffrey, Sewardsen
Marcel, fan, helck
Yang-Jakob, Songke
Application Number:
JP2006500227A
Publication Date:
July 07, 2010
Filing Date:
January 20, 2004
Export Citation:
Assignee:
ELEKTA AB
International Classes:
A61B6/03; A61B6/00; A61N5/10; G06T11/00
Domestic Patent References:
| JP7194588A | ||||
| JP58206724A | ||||
| JP62104388A | ||||
| JP2001327514A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hiroyuki Nagai
Junpei Okada
Hirohito Katsunuma
Hiroyuki Nagai
Junpei Okada
Hirohito Katsunuma