CLINICAL MEDICINE

Detailed explanation-1: -Filters are metal sheets placed in the x-ray beam between the window and the patient that are used to attenuate the low-energy (soft) x-ray photons from the spectrum.

Detailed explanation-2: -The purpose of the aluminum filter is to remove the low energy, long wavelength, and least penetrating x-rays from the x-ray beam. These x-rays are harmful to the patient and are not useful in producing a diagnostic-quality radiograph. X-ray machines operating at 70 kVp or above must have aluminum filtration of 2.5 mm.

Detailed explanation-3: -Undesirable wavelength can be suppressed by passing the beam through an absorber (filter) which absorption edge lies just above the parasitic wavelength. No Filter Ni Filter Cu radiation Page 20 X-ray Filters The filtration is never perfect.

Detailed explanation-4: -Beam hardening is the removal of low energy photons from the x-ray beam before reaching the object, through the use of filtration or other objects placed in the path of the x-ray beam [5].