Radiology Quiz

The intensity of radiation reduces as it passes through the patients body because of

• reflection

• transmission

• attenuation

• resistance

The cathode is

• a positively charged electrode.

• a metal target that is bombarded with high-speed electrons.

• a filament that emits electrons when heated.

• a rotating disc made of a high melting point metal.

The binding energy of K and L shell of an atom is 24 keV and 4 keV respectively. How much energy of X-ray produced when an electron from L shell falls to the K shell?

• 28 keV

• 6 keV

• 20 eV

• 20 keV

How to increase the X-ray attenuation?

• Use thicker and low Z material.

• Use low X-ray energy on high Z material.

• Use low X-ray energy on thin material.

• Use high X-ray energy on low Z material.

The following are the advantages of DR cassette except

• Better image quality

• Lower risk of overexposure

• Portable

• Fast processing

What causes the X-ray filament to heat up once the current pass through it?

• The filament resistance.

• The electron flow.

• The atom vibration.

• The voltage increment.

Bremsstrahlung X-ray is produced when

• high energy particles collide with inner shell electrons.

• an electron from outer shell fall into lower shell.

• energetic electrons lose energy and deflected.

• a target is exposed to light.

Which of the following components reduces the scattering radiation that reach the X-ray detector?

• Bucky

• Collimator

• Grid

• Aluminium support

Why the DR cassette does not require a processor?

• Because it is cheap.

• Because it does not have silver ions.

• Because the image data is transferred directly to the computer.

• Because the image is already visible without processing.

The image here have an obvious artifact. What causes this image artifact?

• X-ray intensity too low

• X-ray intensity too high

• Patient has metal implant.

• Patient moved during the scan,