A system for measuring flow information of a fluid, the system includes a
light emission control unit for passing an X-ray through a specimen only
at desired moments; a scintillator installed on an axis of a beam to
convert an X-ray wavelength flow image, which is generated while the
X-ray passes through the specimen, into a visible wavelength flow image;
and a recording device for acquiring a flow image focused on the
scintillator. The system may further include a synchronization unit for
synchronizing the recording device with the light emission control unit
to acquire two or more flow images at a predetermined interval using the
recording device; and a PIV velocity field measurement unit for
extracting quantitative flow information from the two or more flow images
acquired by the recording device.