X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2004-12-01
2008-10-14
Kao, Chih-Cheng G (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
Reexamination Certificate
active
07436925
ABSTRACT:
The invention relates to a computer tomography method in which a bundle of rays passes through an object that is moving periodically, in particular a heart. During the acquisition of measured values, a movement signal dependent on the movement of the object is sensed. From this movement signal are determined periodically repeated phases of movement, after which a plurality of intermediate images of a region of the object are reconstructed, in particular at a low resolution, using measured values whose times of acquisition were situated in different phases of movement, thus enabling each intermediate image to be assigned to a phase of movement. The phase of movement in which the object moved least in the region is then identified by determining the intermediate image having the fewest motion artifacts. Finally, a computer tomographic image of the region is reconstructed, in particular with a high spatial resolution, from measured values whose times of acquisition were situated in the phase of movement in which there was the least movement by the object in said region.
REFERENCES:
patent: 5383231 (1995-01-01), Yamagishi
patent: 5751782 (1998-05-01), Yoshitome
patent: 6504894 (2003-01-01), Pan et al.
patent: 6510337 (2003-01-01), Heuscher et al.
patent: 6529575 (2003-03-01), Hsieh
patent: 6539074 (2003-03-01), Yavuz et al.
patent: 6865248 (2005-03-01), Rasche et al.
patent: 7277565 (2007-10-01), Rasche et al.
patent: 2001/0043671 (2001-11-01), Grass et al.
patent: 2003/0007593 (2003-01-01), Heuscher et al.
patent: 2003/0092983 (2003-05-01), Baker et al.
patent: 2004/0062342 (2004-04-01), Cahill
patent: 2005/0111622 (2005-05-01), Bruder et al.
patent: 2005/0226527 (2005-10-01), Weese et al.
Manzke et al., Automatic phase determination for retrospectively gated cardiac CT, Nov. 22, 2004, Med. Phys. 31 (12), pp. 3345-3362.
Manzke, Cardiac Cone Beam CT, Sep. 2004, A dissertation submitted in partial fulfillment of the requirements for the degree Doctor of Philosophy of the University of London, available at http://www.cardiac-ct.net/PhD—Manzke—2004—Final.pdf.
Manzke et al., Artifact Analysis and Reconstruction Improvement in Helical Cardiac Cone Beam CT, Sep. 2004, IEEE Transactions on Medical Imaging, vol. 23, No. 9, pp. 1150-1164.
Manzke et al., Automatic phase point determination for cardiac CT imaging, Feb. 16, 2004, Medical Imaging 2004, SPIE vol. 5370, pp. 690-700.
Hoffmann et al., Noninvasive Coronary Angiography with 16-Detector Row CT: Effect of Heart Rate, available on line Nov. 18, 2004, reference 10.1148/radiol.2341031408, Radiology 2005; 234:86-97.
Vembar, M., et al.; A dynamic approach to identifying desired physiological phases for cardiac imaging using multislice spiral CT; 2003; Med. Phys.; 30(7)1683-1693.
Grass Michael
Manzke Robert
Corbett John M
Kao Chih-Cheng G
Koninklijke Philips Electronics , N.V.
LandOfFree
Computer tomography method for objects moving periodically does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Computer tomography method for objects moving periodically, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer tomography method for objects moving periodically will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4007754