US Patent No: 4,633,307

Number of patents in Portfolio can not be more than 2000

Digital subtraction fluorographic method and apparatus

1 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

In a digital intravenous subtraction fluorographic system, X-ray subtraction images obtained by performing a subtraction between the precontrast images and the post-contrast images are processed by comparing, for each pixel, the value of the pixel image data in the difference image with a predetermined threshold intensity value, and recognizing the time until the value of the pixel image data reaches the threshold intensity value. The resulting time data so determined in the processor is used for displaying the distribution of contrast medium in the vessel in relation to the time periods it takes for each pixel to attain the predetermined threshold intensity. In effect, the time data for each pixel is itself converted to an intensity signal dependent on the amount of time it takes for each pixel to cross the predetermined threshold intensity, and it is the time period derived intensity signal which is displayed.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA TOSHIBATOKYO36116

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Honda, Michitaka Yaita, JP 28 286

Cited Art

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (2)
4,504,908 Matched filter for X-ray temporal subtraction 19 1982
4,542,459 Matched filter for x-ray hybrid subtraction 28 1982
 
WISCONSIN ALUMNI RESEARCH FOUNDATION (2)
4,204,226 Real-time digital X-ray time interval difference imaging 54 1978
4,204,225 Real-time digital X-ray subtraction imaging 66 1978
 
THOMSON-CSF BROADCAST, INC. (1)
4,436,095 Method and apparatus for imaging a body 10 1981

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
MEDRAD, INC. (11)
6,385,483 Patient specific dosing contrast delivery systems and methods 53 1998
6,889,074 Patient specific dosing contrast delivery systems and methods 28 2000
7,427,281 Method of delivering fluid mixtures to multiple patients 5 2001
6,901,283 Adjusting a condition of a fluid medium to produce an image of a patient 48 2002
7,313,431 System and method for inflating a balloon catheter and delivering fluid media to a patient 6 2004
8,295,914 Systems and methods of determining patient transfer functions and modeling patient response to a pharmaceutical injection 0 2005
7,925,330 Devices, systems and methods for determining parameters of one or more phases of an injection procedure 0 2005
8,197,437 Systems and methods of modeling pharmaceutical propagation in a patient 0 2007
8,428,694 Methods for determination of parameters for a procedure, for estimation of cardiopulmonary function and for fluid delivery 0 2008
8,315,449 Identification of regions of interest and extraction of time value curves in imaging procedures 0 2008
8,346,342 Systems and methods of determining patient physiological parameters from an imaging procedure 0 2011
 
KABUSHIKI KAISHA TOSHIBA (2)
5,018,173 Diagnosis apparatus using X-ray CT device 19 1989
5,095,906 Image processing system 12 1991
 
U.S. PHILIPS CORPORATION (2)
4,853,947 Method of generating an X-ray layer image of an examination zone, and device for performing the method 5 1987
5,347,570 Method for peripheral angiography and arrangement for carrying out the method 17 1993
 
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC (1)
7,869,560 X-ray CT apparatus and image processing apparatus 0 2008
 
GLOBAL ADVANCED METALS, USA, INC. (1)
7,425,093 Thermography test method and apparatus for bonding evaluation in sputtering targets 4 2004
 
KONINKLIJKE PHILIPS ELECTRONICS N.V. (1)
6,426,994 Image processing method 5 2000
 
OLEA MEDICAL (1)
8,320,647 Method and system for processing multiple series of biological images obtained from a patient 2008
 
UNIVERSITY OF CHICAGO, THE (1)
4,841,555 Method and system for removing scatter and veiling glate and other artifacts in digital radiography 21 1987