1
The passage of primary x-ray photons through a patient without interaction in body tissue is called...
Direct transmission
Most scattered radiation produced during radiographic procedures is the direct result of...
Compton interactions
In which x-ray interaction with matter is the energy of the incident photon completely absorbed?
Photoelectric
When primary photons in the x-ray beam are decreased through the processes of absorption and scatter as the beam passes through the patient in its path _____ occurs.
Attenuation
Before interacting with matter, an incoming x-ray photon may be referred to as....
primary photon
Within the energy range of diagnostic radiology (23 to 150 kVp), which also includes mammography, when kVp is decreased, the patient dose:
Increases
Of the following interactions between x-radiation and matter, which only occur above the range of diagnostic radiology?
1.Photoelectric absorption
2.Pair production
3. Photodisintegration
2 and 3 only
Within the energy range of diagnostic radiology, as absorption of electromagnetic energy in biologic tissue increases, the potiential for biologic damage:
Increases
what term is used for the energy absorbed by the patient per unit mass
Absorbed dose
Also known as unmodified scattering
Coherent and Classical
What is the result of coherent scattering?
usually just a small angle change in the direction of the incident photon
Direct transmission means that x-ray photons:
Pass through biologic tissue without interaction
has the same mass and magnitude of charge as a negatron
Positron
What interaction between x-radiation and matter does not occur within the range of diagnostic radiology?
Pair production
Primary radiation is synonymous with:
Direct radiation
Which of the following are radiographic image receptors?
1. Radiographic grid
2. Digital image receptor
3. Phosphor plate
2 and 3 only
The process most responsible for the contrast between bone and soft tissue in a diagnostic radiographic image is:
Photoelectric absorption
What is the most likely X-radiation interaction with matter to occur at less than 10 keV?
coherent scattering
Degrades the appearance of a completed radiographic image by blurring the sharp outlines of dense structures
small-angle scatter
______ scattering results in all-directional scatter
compton
A technical factor of 100 kVp means that the electrons bombarding the target of the x-ray tube have a maximum energy of:
100,000 eV or 100 keV
to what does the term fluorescent yield refer?
refers to the number of x-rays emitted per innershell vacancy
What type of energy does a photoelectron have?
possesses kinetic energy equal to the energy of the incident photon minus the binding energy of the electron shell
What is the effective atomic number of compact bone?
13.8
Noninteracting and small-angle scattered photons comprise:
Exit or image formation radiation