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X-ray fluoroscopy is a continuous x-ray imaging technique that requires using an X-ray tube with a high tube voltage.

Characteristic x-ray radiation has a continuous spectrum.

A processed film with optical density (OD) of 0.2 is placed over another film with OD of 0.1. The resulting total OD is

Compton scattering may cause reduction of an x-ray beam intensity passing through a patient.

An x-ray tube emits 1014 photons per second. The x-ray is assumed to contain only 50-keV photons and irradiates a 0.2-mm-thick tissue sample for 0.2 second. The HVL of the sample is 0.8 cm, and the energy absorption coefficient of the sample is 0.1 cm−1 for 50-keV photons.

A higher resolution of an X-ray image may be achieved by using

Photoelectric effect is one of the main processes for x-ray generation.

A tissue (12 cm x 20 cm) was exposed for 0.1 second to an x-ray containing 5×1013 photons. The radiation flux is

The anode of an X-ray tube needs to rotate at a high speed in order to accelerate electrons for X-ray generation.

Photoelectric effect causes tissue absorption of an X-ray.