Section 4 ex

When ionization occurs:

 

an atom becomes electrically unstable

The anode is the negatively charged terminal in the x-ray production tube.

False

Bundles of particulate energy found in electromagnetic radiation are called:

 

Photons

In an atom, the following is true about the nucleus' binding energy for electrons:

 

There is greater energy closer to the nucleus.

The beam as it interacts with matter

Secondary radiation

Deflection of the beam as it interacts with matter

Scatter Radiation

The beam which exits the tubehead/PID

Primary Radiation

Braking Radiation can be characterized by the following:

 

it occurs when an electron comes near or hits the Target atom's nucleus

velocity

speed at which the wave travels

wavelength

distance between two crest of the wave

frequency

number of waves that pass a point at specific amount of time

The point in the x-ray unit in which radiation energy is produced is the:

 

target of anode

All of the following make a beam more intense, except:

 

increased target-receptor distance

The density of a radiograph can be affected by the following exposure factor:

 

all factors listed affect density

The greatest force of electricity to your x-ray unit happens when 

 

the exposure switch is activated.

affects the penetration power

kilovoltage

affects number of electrons available at thermionic emission

milliamperage

determination of wavelength

kilovoltage

the interval of exposure in impulses

exposure time

What must be adjusted to change the scale of contrast in an image?

 

kilovoltage

If a periapical image appears with too low of density, which of these could have been the cause?

 

the patient is larger than average

When there is a long-scale contrast, how would you describe the contrast between adjacent "colors" in the image?

 

low contrast

The following is a statement that describes the concept of the Inverse Square Law:

 

the beam intensity decreases when the TRD/PID length is greater

Altering the Exposure Time of the x-ray beam might be necessary in varying patients or for specific image types.

True

X-rays used in diagnostic dental radiography are:

 

high frequency, short wavelength

You just purchased a new x-ray unit for the practice.  This unit has a 16" long TRD (PID) - your last one had an 10" TRD (PID). 

What adjustment might you need to make from your previous exposure settings?

 

an increase in exposure time

What exposure error may have caused this result:

 

milliamperage set too high

Scatter radiation can affect the patient and any other person in the operatory at the time of an exposure.

True

impacts the speed at which the electrons move from the cathode to the anode

kilovoltage peak

affects the heat at the cathode

millamperage

impacts the density of the image

both kilovoltage and millamperage

affects the intensity of the x-ray beam

both kilovoltage and millamperage

If a patient is moving during a radiographic exposure, the following image error may result:

 

there may be a loss of detail

If the Target-Receptor Distance is long, what happens to the image dimension?

 

there will be less magnification

Even if a child has caries experience before 5 years of age, they should not have radiographs.

 

False

Of the PA's listed here, which would be the most difficult for a patient with a hypersensitive gagging reflex?

 

maxillary molar

When x-ray imaging during an endodontic procedure, the following technique is preferred:

 

Paralleling technique

If a child or a mobility impaired person requires assistance holding an image receptor during an exposure, the following person is most ideal to assist in this:

 

a non-pregnant caregiver

Which of the following image exam options is most appropriate for a fully edentulous patient?

 

Panoramic image

What color is the XCP designed for intraoral endodontic working pa's when the patient may have points or files extending beyond their occlusal plane?

Green