Patent ID: 7187749
Filing Date: 2007-03-06
Classification: A61B

Abstract:
1. A medical X-ray imaging apparatus comprising a blur compensation apparatus for X-ray image of a head of an object comprising: an X-ray generator; an X-ray imaging device positioned opposite said X-ray generator; an object holding means interposing said object therebetween said X-ray generator and said X-ray imaging device, wherein said object holding means comprising a reference position and a head fixing part for fixing the head of an object near an objective projection position; a sensor means for detecting blur movement of said object fixed on said head fixing part; said sensor means moves together with said object during X-ray radiography and detects the positional change amount relative to said reference position of said objective projection position, based on any one of accelerated velocity, angular speed, and angle acted on said object holding means, in two directions on a relative moving plane of said imaging apparatus or in two directions parallel to the imaging plane, defined by at least said object and the imaging device when said X-ray generator and said X-ray imaging device are relatively moved for X-ray radiography producing X-ray image of said object; a blur compensation means executes a blur compensation process on a plurality of two dimensional images based on an image blur movement amount and a deviation of zoom rate calculated from said positional change amount respective to at least said two directions detected by said sensor means for compensating the image of the object, and thereafter the blur compensation means rearranges and stores a series of X-ray image frames including X-ray image frame of which blur movement is compensated in time series order as in the X-radiography.