Image analysis – Applications – Biomedical applications
Reexamination Certificate
2009-03-10
2010-11-02
Bhatnagar, Anand (Department: 2624)
Image analysis
Applications
Biomedical applications
C128S922000, C378S004000
Reexamination Certificate
active
07826651
ABSTRACT:
A method for checking an x-ray diagnostic apparatus is provided. Fluoroscopic series of x-ray images of a technical phantom are digitally acquired and stored. Difference between a dynamic image and a background image is calculated. A measuring field is predicted. Priori information about the shape of a clinically relevant object is determined. Hough transformation on a gray value image corresponding to the difference is applied. Contrast of the object from the Hough-transformed gray value image is determined. A square of the determined contrast is calculated. A noise variance is calculated by determining a sum of a noise variance of a homogenous image region and a variance of the background image. A contrast-to-noise ratio of the determined contrast and the calculated noise variance is determined. A square of the contrast-to-noise ratio is dynamically averaged. A Clinical Relevant Fluoroscopy Performance index for the x-ray diagnostic apparatus is determined.
REFERENCES:
patent: 3069654 (1962-12-01), Hough
patent: 4707786 (1987-11-01), Dehner
patent: 4761819 (1988-08-01), Denison et al.
patent: 5081357 (1992-01-01), Agano
patent: 5181234 (1993-01-01), Smith
patent: 5436829 (1995-07-01), Hartley
patent: 5594807 (1997-01-01), Liu
patent: 5651042 (1997-07-01), Dewaele
patent: 5850465 (1998-12-01), Shimura et al.
patent: 2003/0198403 (2003-10-01), Ottesen
James T. Dobbins III; “Handbook of Medical Imaging”; 2000; pp. 1-5 and 163-222; vol. 1. Physics and Psychophysics; Chapter 3—Image Quality Metrics for Digital Systems; SPIE, Bellingham, Washington.
William K. Pratt; “Digital Image Processing”; 1978; pp. 522-525 and 548-549; John Wiley & Sons; New York, NY.
Böhm Stefan
Durlak Peter
Heer Volker
Kolarjk Martin
Bhatnagar Anand
Siemens Aktiengesellschaft
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