4TH YEAR QUIZBOWL HARD ROUND

The reduction in the inensity of an x-ray beam as it passes through material is termed

• scattering

• absorption

• attenuation

• divergence

The largest amount of diagnostic x-ray absorption is most likely to occur in which of the following tissues?

• Lung

• Adipose

• Muscle

• Bone

The automatic exposure device that is located immediately under the x-ray table is the

• ionization chamber

• scintillation camera

• photomultiplier

• photocathode

The photoelectric effect is an interaction between an x-ray photon and

• another photon

• an inner-shell electron

• a nucleus

• an outer-shell electron

Any wall that the useful x-ray beam can be directed toward is called a

• scattered barrier

• leakage barrier

• primary barrier

• secondary barrier

Is the transfer of some of the incidentparticle’s energy to electrons in theabsorbing material, promoting them toelectron orbitals farther from the nucleus(i.e., higher energy levels).

• EXCITATION

• ionization

• radiative losses

• RADIATION

Occurs when the incident x-ray isabsorbed into one of the inner electronshells and emits a photoelectron

• Pair production

• Partial Absorption

• Photoelectric

• Compton

A Type of scattering where in thereis a change in the direction of anincident x-ray without a loss of energy.

• Inelastic interaction

• Compton interaction

• Rayleigh scattering

• non-classical

GERMAN WORD FOR "BRAKING RADIATION "

• ionization

• EXCITATION

• BREMSSTRAHLUNG

• RADIATION

Which of the following is recommended for the pregnant radiographer?

• Wear two dosimeters and switch their positions appropriately

• Change dosimeters weekly

• The pregnant radiographer must leave radiation areas for duration of the pregnancy

• Wear a second dosimeter under the lead apron