Method for processing a radiation image sequence composed of a number of successively acquired radiation images acquired with a dynamic image converter
AssigneeSiemens Aktiengesellschaft
InventorHeinz Horbaschek
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Abstract
In a method and apparatus for processing a radiation image sequence composed of a number of successively acquired radiation images acquired with a dynamic image converter, particularly a solid-state image detector, the images having been acquired with a radiation examination device in a fluoroscopic mode or in a digital cinematographic mode, the spatial frequency spectra of the individual images or frames are subjected to a signal-dependent, temporal filtering with separate filter functions and are merged for forming a filtered overall image.
Claims15
A method for processing a radiation image sequence composed of a plurality of successively acquired radiation images, acquired with a dynamic image converter in a fluoroscopic mode or in a digital cinematographic mode, each of said images comprising a spatial frequency spectrum, said method comprising the steps of:
- subjecting the respective spatial frequency spectra of said images to a signal-dependent, temporal filtering with respectively separate filter functions, thereby obtaining a plurality of individual filtered images;
- and
- merging said plurality of individual filtered images to form an overall filtered image.
A medical radiation examination apparatus comprising:
- a radiation source adapted to irradiate a subject, thereby producing attenuated radiation;
- a dynamic image converter for acquiring said attenuated radiation;
- a control and evaluation unit for operating said radiation source and said dynamic image converter in a mode selected from the group consisting of a fluoroscopic mode and a digital cinematographic mode, to obtain an image sequence composed of a plurality of radiation images successively acquired by said dynamic image converter, each of said radiation images having a spatial frequency spectrum;
- and
- said control and evaluation unit being supplied with said image sequence and subjecting the respective spatial frequency spectra of said images to a signal-dependent temporal filtering with respectively separate filter functions, thereby producing a plurality of filtered images, and merging said plurality of filtered images to form an overall filtered image.
Dependencies are inferred from the claim text.