Dynamic diagnosis support information generation system
A dynamic diagnosis support information generation system includes: a radiation generator capable of irradiating a pulsed radiation; a radiation detector which is provided with a plurality of detecting elements arranged in two-dimension, detects the pulsed radiation irradiated from the radiation generator at each of the plurality of detecting elements and generates frame images successively; and an analysis section which calculates and outputs a feature value relating to a dynamic image of a subject based on a plurality of frame images generated by radiographing the subject by using the radiation generator and the radiation detector, wherein the analysis section calculates the feature value relating to the dynamic image of the subject by corresponding pixels to each others representing outputs of a detecting element at a same position in the radiation detector among the plurality of the frame images.
1. A dynamic diagnosis support information generation system for a chest which is in respiratory movement comprising:
a radiation generator capable of irradiating a radiation;
a radiation detector comprising a plurality of detecting elements arranged in two dimension, the radiation detector being configured to detect the radiation irradiated from the radiation generator at each of the plurality of detecting elements and generate frame images successively; and
an analysis section configured to calculate and output a respective feature value for each of a ventilation and a blood flow of the chest based on a plurality of the frame images generated by radiographing a subject using the radiation generator and the radiation detector which produces a dynamic image of the subject, the dynamic image representing a state of a movement of the subject,
wherein for each calculation of each respective feature value, the analysis section is configured to:
apply a filtering in the direction of a time axis for each output signal of the plurality of detecting elements representing both of the ventilation and the blood flow in order to obtain a filtered output signal for each detecting element corresponding to respective pixels of the plurality of the frame images, and wherein the filtered output signal represents only one among the ventilation and the blood flow corresponding to the respective feature value being calculated, and
calculate the respective feature value by correlating mutually each filtered output signal for a respective pixel position among the plurality of the frame images corresponding to a same position in the radiation detector,
wherein in calculating the feature value for the blood flow, a high-pass filter in the direction of the time axis is applied as the filtering, and
wherein in calculating the feature value for the ventilation, a low pass filter in the direction of the time axis is applied as the filtering.
2. The dynamic diagnosis support information generation system described in claim 1 ,
wherein a frame rate for the successive frame images is greater than 7.5 frames per second.
3. The dynamic diagnosis support information generation system described in claim 1 ,
wherein the analysis section correlates some pixels of the radiation detector into a block and calculates a value representing the block by using the filtered output signals of the pixels in the block and correlates mutually each value among the plurality of the frame images at a same position in the radiation detector.
4. The dynamic diagnosis support information generation system described in claim 3 ,
wherein a size of each block is not greater than 5 mm.
5. The dynamic diagnosis support information generation system described in claim 4 ,
wherein a frame rate for the successive frame images is greater than 7.5 frames per second.