Computed tomography apparatus

Details Computed tomography apparatus Computed tomography apparatus

2005-04-12

2005-04-12

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S008000, C600S425000, C600S428000

Reexamination Certificate

active

06879655

ABSTRACT:
The invention relates to a computed tomography apparatus in which measuring data of a patient is acquired along a helical trajectory by means of a conical radiation beam. The size of the detector window is then a factor of 3, 5, 7 . . . larger than the distance between neighboring turns of the helix. In order to select from among the acquired redundant data the data which is suitable for completely filling the Radon domain so as to achieve exact reconstruction, in accordance with the invention it is proposed to provide a cardiac motion signal detection device for the detection of a cardiac motion signal representing the cardiac motion and to arrange the reconstruction unit so as to select such measuring data from among the measuring data regionally redundantly filling the Radon domain that the Radon domain is completely and homogeneously filled with measuring data from cardiac motion phases with as little motion as possible.

REFERENCES:
patent: 5430783 (1995-07-01), Hu et al.
patent: 6269141 (2001-07-01), Proksa et al.
patent: 0 981 995 (1999-07-01), None
R. Prosksa, et al.; “The n-PI-Method for Helial Cone-Beam CT”; IEEE Transactions on Medical Imaging, vol. 19, No. 9, Sept. 2000, pp. 848-863.

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