MODULE 1 REVIEW

Front

What is Bremsstrahlung radiation?

Back

Bremsstrahlung radiation, or 'braking radiation', is the radiation produced when charged particles, such as electrons, are decelerated or deflected by the electric field of atomic nuclei. It is a significant source of x-ray production in medical imaging.

Front

What is the photoelectric effect in x-ray interactions?

Back

The photoelectric effect occurs when an x-ray photon is completely absorbed by an atom, resulting in the ejection of an inner-shell electron. This interaction is significant in diagnostic radiology as it contributes to image contrast.

Front

What is coherent scatter?

Back

Coherent scatter, also known as classical scatter, occurs when low-energy x-ray photons interact with matter and are scattered without a loss of energy. This type of interaction does not contribute to image formation.

Front

What is Compton scatter?

Back

Compton scatter is an interaction where an x-ray photon collides with a loosely bound outer-shell electron, resulting in the ejection of the electron and a change in the direction and energy of the photon. It is a major contributor to radiation dose.

Front

What is the historical unit of measurement for exposure in air?

Back

The historical unit of measurement for exposure in air is the Roentgen (R), which quantifies the amount of ionization produced in air by x-ray or gamma radiation.

Front

What does the inverse square law state?

Back

The inverse square law states that the intensity of radiation is inversely proportional to the square of the distance from the source. As the distance from the source increases, the intensity decreases.

Front

What is the unit of measurement for dose equivalent?

Back

The unit of measurement for dose equivalent is the Sievert (Sv), which accounts for the biological effects of different types of radiation.

Front

What is kerma?

Back

Kerma (Kinetic Energy Released per unit MAss) is a measure of the energy transferred from radiation to matter, specifically the energy transferred to charged particles in a material.

Front

What is the difference between Roentgen and Rem?

Back

Roentgen measures exposure in air, while Rem (Roentgen Equivalent Man) measures the biological effect of radiation on human tissue, accounting for the type of radiation.

Front

What is the significance of the photoelectric effect in medical imaging?

Back

The photoelectric effect is significant in medical imaging because it enhances image contrast, particularly in areas with high atomic number materials, such as bones.