公开(公告)号：EP1324697A1

公开(公告)日：2003-07-09

申请号：EP00964604.3

申请日：2000-09-28

Applicant: Philips Medical Systems Technologies Ltd.

Inventor： MALAMUD, Gabriel

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4014 ,  A61B6/4028 ,  A61B6/4085

Abstract: In a rotate CT scanner a plurality of source-detector units are mounted on a gantry displaced from each other in the Z direction and the detector units are arranged to acquire data from large volumes of a subject in a single rotation so that the scanner can provide time-coherent images of large organs.

公开(公告)号：EP1446682A1

公开(公告)日：2004-08-18

申请号：EP01274755.6

申请日：2001-11-20

Applicant: Philips Medical Systems Technologies Ltd.

Inventor： ELGALI, Avner

IPC: G01T1/20 ,  G01T1/164 ,  G01T1/29

CPC classification number: G01T1/2985 ,  G01T1/1648 ,  G01T1/2018

Abstract: A CT detector-module for detecting X-rays comprising: a matrix of photosensors, each of which generates signals responsive to photons incident thereon; a scintillator mounted over the matrix that converts X-rays incident on the scintillator to photons to which the photosensors are sensitive; an anti-scatter collimator mounted over the scintillator; and electronic circuitry located in close proximity to the photosensors to which each of the photosensors is connected for processing the signals generated by the photosensors; wherein parts of the module are formed from an absorbing material having a high X-ray absorption coefficient and shield the circuitry from radiation.

公开(公告)号：EP1351607A1

公开(公告)日：2003-10-15

申请号：EP01900621.2

申请日：2001-01-18

Applicant: Philips Medical Systems Technologies Ltd.

Inventor： RUIMI, David

IPC: A61B6/10 ,  A61B6/03

CPC classification number: A61B6/032 ,  A61B6/10

Abstract: A CT system for use in interventional procedures on a patient (20) supported by a support surface (24). The system includes a normal mode in which a patient is irradiated over an angle including irradiation from a general direction above the support surface, and a reduced angle irradiation mode in which the patient is irradiated only from an angle at which a physician is indicated as not being present or is assumed not to be present.

公开(公告)号：EP1427337A2

公开(公告)日：2004-06-16

申请号：EP01967656.8

申请日：2001-09-05

Applicant: Philips Medical Systems Technologies Ltd.

Inventor： DAFNI, Ehud

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/488 ,  A61B6/542

Abstract: A method for determining a modulation function for modulating intensity of X-rays provided by an X-ray source of a CT-system for CT-imaging a slice of a region a person's body, the method comprising: acquiring X-ray attenuation data for a first substantially anterior-posterior or lateral view of the slice; determining a first maximum X-ray attenuation from the attenuation data; determining a length of a projection of the slice along an axis in the plane of the slice that is substantially orthogonal to the view angle using the attenuation data; determining a second maximum X-ray attenuation for a second view orthogonal to the first view based on the determined length; and using the first and second attenuation maxima to determine the modulation function.