Tissue Interactions Flashcards
T/F: As the energy of an x-ray beam is increased, the penetrability is increased
True
T/F: In the diagnostic range, characteristic radiation constitutes most of the x-ray beam
False
T/F: Penetrability is an expression of x-ray quality and conveys the ability of x-rays to pass through tissues
True
T/F: Transmission is the term used to describe what happens when the x-ray photon travels through the part completely
True
T/F: X-ray quality decreases as kVp increases
False
___ is the reduction of intensity of the x-ray beam as it passes through tissue being imaged
attenuation
With the Compton effect, a ___ shell electron is ejected
outer
Which x-ray interactions with tissue occur in the diagnostic imaging x-ray energy range
Compton & Photoelectric
Which x-ray interactions with tissue involve the removal of an orbital electron?
(1) Compton
(2) Characteristic
(3) Photoelectric
1 and 3
T/F: When x-ray photons are created and exit the tube in the primary beam, all the x-ray photons have different energy levels (or the primary beam is considered to be poly-energetic)
True
When the kVp selected is equal to or slightly greater than the inner shell binding energy of a tissue atom, which interaction predominates?
Photoelectric
What is the ejected electron called in a photoelectric event?
Photoelectron
What is the effect of increasing kVp on the x-ray beam?
Increased quality and penetrability
The x-ray beam that leaves the patient in the direction of the image receptor is often referred to as:
exit radiation
The photoelectric interaction most commonly occurs when the incident photon strikes a/an:
inner shell electron
The penetrating power of the x-ray beam is controlled by varying the:
kVp
The overall ability of the beam to penetrate an anatomical part is called:
quality
The opposite of radiolucent is:
opacity/radiopaque
The amount of energy absorbed by an irradiated object is primarily controlled by:
1. Energy of incident photon
2. Atomic number of the tissue
3. Speed of the incident photon
1 and 2
Primary radiation is defined as:
radiation that exits from the tube port
During a photoelectric interaction, the incident photon is ____________ by the electron of the target atom.
totally absorbed
Attenuation is the product of:
absorption and scattering
As the energy of an x-ray beam is increased, the penetrability is ______________.
increased
___ refers to x-rays leaving the patient that did not interact with atoms as it passed through the patient.
Transmission
