Koninklijke Philips Corporation N.v.

Steven J Utrup

Randall Peter Luhta

Dominic J Heuscher

Kevin Martin Brown

A computed tomography system () includes an x-ray source () that rotates about an examination region () and translates along a longitudinal axis (). The x-ray source () remains at a first location on the longitudinal axis () while rotating about the examination region (), accelerates to a scanning speed and performs a fly-by scan of a region of interest () in which at least one hundred and eighty degrees plus a fan angle of data is acquired. At least one detector () detects x-rays radiated by the x-ray source () that traverses the examination region () and generates signals indicative thereof. A reconstructor () reconstructs the signals to generate volumetric image data.

Fly-by scanning

A third generation CT scanner includes a rotating x-ray source ( ) and a detector array ( ). Each sampling of the detector array generates a source fan data line of data values that are converted ( ) to attenuation values in a logarithmic domain and subject to preliminary corrections ( ). Attenuation values from a plurality of adjoining source fans are converted ( ) back to a non-logarithmic domain as intensity values. A corresponding deconvolution function ( ) from a deconvolution function look-up table ( ) corresponding to the detector whose intensity value is being corrected is deconvolved with a line ( ) of the intensity values which spans a plurality of adjoining source fan data lines to remove the intensity attributable to off-focal radiation ( ). The intensity data is converted ( ) back into attenuation values in the logarithmic domain and reconstructed ( ) into an image representation for display on a monitor ( ).

Growing community of inventors

Willoughby, OH, United States of America

Steven J Utrup