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US 9,916,656 B2Granted
Method for processing radiographic image and radiography system
AssigneeDrtech Corporation
InventorsHo Yeol Choi, Choul Woo Shin, Mi Jung Jo, Eun Kim, Jeong Pil Kim, Yong Ju Na
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Abstract
Provided is a method for processing a radiographic image including obtaining a radiographic image using an indirect radiographic detector comprising a scintillator panel and a pixel array panel, determining a parameter value for defining a point spread function (PSF) according to the scintillator panel or the pixel array panel, and correcting the radiographic image by deconvoluting the radiographic image using the PSF to which the parameter value is applied.
Claims10
A method for processing a radiographic image comprising:
- obtaining a radiographic image using an indirect radiographic detector comprising a scintillator panel and a pixel array panel;
- determining a parameter value for defining a point spread function (PSF) according to the scintillator panel or the pixel array panel;
- and
- correcting the radiographic image by deconvoluting the radiographic image using the PSF to which the parameter value is applied;
- wherein, in the determining the parameter value, the parameter value is determined to allow a correction image for which the radiographic image is deconvoluted using the PSF to satisfy an image quality reference, and
- the image quality reference comprises a condition that for a spatial frequency of the correction image, a value of a modulation transfer function (MTF) decreases according to an increase in spatial frequency, and the value of the MTF is a highest in the correction image according to the parameter value.
3 more elements
A radiography system comprising:
- a radiation irradiating unit irradiating a radiation on a subject;
- an indirect radiation detector comprising a scintillator panel converting a radiation, which passes through the subject and is incident thereto, to a visible light, and a pixel array panel storing charges generated by the visible light in each pixel, and realizing a radiographic image according to a charge amount in each pixel;
- and
- an image processing unit correcting the radiographic image by deconvoluting the radiographic image obtained by the indirect radiation detector using a point spread function (PSF);
- wherein the image processing unit comprises an iteration setting unit setting a number of times of deconvoluting the radiographic image, and
- the iteration setting unit sets an iteration number for satisfying a condition that a DQE value of a correction image, which is corrected by deconvoluting the radiographic image with the PSF, is in a range of 90% to 110% of a DQE value of the radiographic image in a same spatial frequency.
3 more elements
Dependencies are inferred from the claim text.