Processing apparatus, method of operating processing apparatus, and operation program for processing apparatus
AssigneeFUJIFILM Corporation
InventorKoichi Kitano
Life of this patent
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Abstract
A body thickness conversion unit converts a body thickness from a distance image imaged by a distance measurement camera to acquire the body thickness. A setting unit sets a gradation transformation function for use in gradation transformation processing to a radiographic image corresponding to the body thickness. A radiographic image acquisition unit acquires the radiographic image output from a radiation detector in radioscopy. A gradation transformation processing unit starts the gradation transformation processing with the gradation transformation function set by the setting unit.
Claims10
A processing apparatus that is used for a radioscopy apparatus including a radiation source configured to continuously irradiate a subject with radiation and a radiation detector configured to detect the radiation transmitted through the subject to output a radiographic image, the processing apparatus comprising:
- at least one processor,
- the processor is configured to
- (1) acquire a body thickness of the subject measured by a body thickness measurement sensor,
- (2) set a gradation transformation function for use in gradation transformation processing to the radiographic image corresponding to the body thickness, gradation transformation processing processes an input pixel value which is a pixel value of the radiographic image and outputs as an output pixel value,
- (3) acquire the radiographic image output from the radiation detector, and
- (4) execute the gradation transformation processing with the set gradation transformation function,
- (5) derive a spatial frequency-strength characteristic of the radiographic image after the gradation transformation processing, and
- (6) in a case in which a peak of the spatial frequency-strength characteristic is equal to or greater than a threshold frequency set or calculated in advance, output the radiographic image after the gradation transformation processing, and in a case in which the peak is less than the threshold frequency, reset the gradation transformation function and repeat the process from (3).
A method of operating a processing apparatus that is used for a radioscopy apparatus the method comprising:
- continuously irradiating radiation from a radiation source to a subject;
- and
- detecting the radiation transmitted through the subject using a radiation detector to output a radiographic image,
- acquiring a body thickness of the subject measured by a body thickness measurement sensor;
- setting a gradation transformation function for use in gradation transformation processing to the radiographic image corresponding to the body thickness, gradation transformation processing processes an input pixel value which is a pixel value of the radiographic image and outputs as an output pixel value;
- acquiring the radiographic image output from the radiation detector;
- executing the gradation transformation processing with the set gradation transformation function;
- deriving a spatial frequency-strength characteristic of the radiographic image after the gradation transformation processing;
- and
- in a case in which a peak of the spatial frequency-strength characteristic is equal to or greater than a threshold frequency set or calculated in advance, output the radiographic image after the gradation transformation processing, and in a case in which the peak is less than the threshold frequency, resetting the gradation transformation function and repeating the process from the acquiring the radiographic image.
A non-transitory computer-readable storage medium storing an operation program for a processing apparatus that is used for a radioscopy apparatus including a radiation source configured to continuously irradiate a subject with radiation and a radiation detector configured to detect the radiation transmitted through the subject to output a radiographic image, the operation program causing a processor to execute:
- (1) body thickness acquisition processing of acquiring a body thickness of the subject measured by a body thickness measurement sensor;
- (2) setting processing of setting a gradation transformation function for use in gradation transformation processing to the radiographic image corresponding to the body thickness, gradation transformation processing processes an input pixel value which is a pixel value of the radiographic image and outputs as an output pixel value;
- (3) image acquisition processing of acquiring the radiographic image output from the radiation detector;
- (4) image processing of executing the gradation transformation processing with the set gradation transformation function;
- (5) deriving a spatial frequency-strength characteristic of the radiographic image after the gradation transformation processing;
- and
- (6) in a case in which a peak of the spatial frequency-strength characteristic is equal to or greater than a threshold frequency set or calculated in advance, output the radiographic image after the gradation transformation processing, and in a case in which the peak is less than the threshold frequency, resetting the gradation transformation function and repeating the process from (3).
Dependencies are inferred from the claim text.