Method for automatic calibration of perfusion parameter images

Image analysis – Applications – Biomedical applications

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07400756

ABSTRACT:
A method is for calibration of perfusion parameter images. The image data from tomographic imaging measurements are analyzed using a perfusion model, and perfusion parameter values obtained from the analysis are calibrated with a calibration factor to a physiological normal value. To perform the calibration, an image area which contains several different tissue compositions, and in which approximately normal perfusion conditions can be assumed, is selected from the obtained perfusion parameter image. A frequency analysis of the perfusion parameter values contained in this image area is then performed, and at least one frequency interval is selected which corresponds at least approximately to a frequency interval of the occurrence of perfusion parameter values of a known tissue composition. A mean value is calculated from the perfusion parameter values in the frequency interval, and a comparison with the physiological normal value for this tissue composition is made in order to determine the calibration factor or a calibration value included in the calibration factor. The method permits automatic or substantially automatic calibration of perfusion parameter images.

REFERENCES:
patent: 6373920 (2002-04-01), Hsieh
patent: 6888914 (2005-05-01), Edic
patent: 6891918 (2005-05-01), Drummond et al.
patent: 2002/0161292 (2002-10-01), Wintermark et al.
patent: 2002/0177957 (2002-11-01), Lee
patent: 2004/0064038 (2004-04-01), Bruder et al.
patent: 2004/0138549 (2004-07-01), Wintermark et al.
patent: 2005/0283070 (2005-12-01), Imielinska et al.
patent: 1 210 910 (2002-06-01), None
Matthias König: “Brain perfusion CT in acute stroke: current status”, in: European Journal of Radiology, vol. 2003, S. S11-S22.
Matthias Koenig, et al., “Quantitative Assessment of the Ischemic Brain by Means of Perfusion-Related Parameters Derived From Perfusion CT”, Stroke, Feb. 2001, pigs 431-437□□.
Ernst Klotz, et al., “Perfusion measurements of the brain: using dynamic CT for the quantitative assessment of cerebral ischemia in acute stroke”, European Journal of Radioloigy 30 (1999), pBs. 170-184□□.
A. Gregory Sorensen, “What is the meaning of Quantitative CBF?”, AJNR, Feb. 22, 2001, pp. 235-236.
Duane D. Blatter, et al., “Quantitative Volumetiric Analysis of Brain MR: Normative Database Spanning 5 Decades of Life”, Am J Neuroradiol, Feb. 1995, pigs. 241-251.
M. König, et al., “CT- perfusion imaging in acute ischemic stroke: comparison of perfusion maps and conventional CT findings”, Georg Thieme Verlag Stuttgart, New York, ISSN 1438-9029, pp. 219-226.
Matthias Koenig, et al., “Quantitative Assessment of the Ischemic Brain by Means of Perfusion-Related Parameters Derived From Perfusion CT”, Stroke, Feb. 2001, pp. 431-437.
M. König, et al., “Cerebral perfusion CT-theoretical aspects, practical implementation and clinical experience in acute ischemic stroke”, Fortschr Röntgenstr 2000; 172: 210-218.
Ernst Klotz, et al., “Perfusion measurements of the brain: using dynamic CT for the quantitative assessment of cerebral ischemia in acute stroke”, Ruropean Journal of Radiology 30 (1999), pp. 170-184.
A. Gregory Sorensen, “What is the meaning of Quantitative CBF?”, AJNR, Feb. 22, 2001, pp. 235-236.
Duane D. Blatter, et al., “Quantitative Volumetiric Analysis of Brain MR: Normative Database Spanning 5 Decades of Life”, Am J Neuroradiol, Feb. 1995, pp. 241-151.
Matthias König: “Brain perfusion CT in acute stroke: current status”, in: European Journal of Radiology, vol. 45, 2003, S. S11-S22.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for automatic calibration of perfusion parameter images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for automatic calibration of perfusion parameter images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for automatic calibration of perfusion parameter images will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2743472

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.