Srry this one is vague...RHS Practice Ex (mometrix) Flashcards
(30 cards)
During panoramic positioning of the patient, if the patient’s chin is positioned too low, what will be seen on the processed radiograph…
the absence of the patient’s condyles in the correct anatomical position.
All of the following are accurate statements regarding hand hygiene under dental gloves EXCEPT:
a) The dental radiographer’s fingernails should be short enough so that they don’t interfere with the placement & removal of dental gloves.
b) Chipped nail polish found on the fingernails of the DA may increase the number of bacteria found in those areas.
c) Rings should be avoided because the skin underneath them contains more bacteria and viruses compared to the skin in other areas w/out rings.
d) Petroleum- based lotions are found to be the most beneficial for DAs to use under gloves, allowing for lotion to have proper contact time w the skin.
d) petroleum- based lotions are found to be the most beneficial for DAs to use under gloves, allowing for lotion to have proper contact time w the skin.
What is true about direct digital imaging…
a sensor is placed in the mouth, it is exposed to radiation, and an image immediately appears on a monitor for viewing.
All of the following statements regarding the somatic effect of radiation are true, EXCEPT:
a) damage caused by radiation from somatic effects is passed on to future generations.
b) xrays can damage somatic tissues.
c) One possible somatic effect of radiation is cancer.
d) xrays affect somatic cells.
a) damage caused by radiation from somatic effects is passed on to future generations.
Which is an accurate description of ionization?
a) the pairing of electrons and protons to create ions.
b) the creation of stable atoms due to radiation striking the nucleus of an ion.
c) the process of particulate radiation striking a cell and destroying the DNA of that cell.
d) the process of converting stable atoms into ions
d) the process of converting stable atoms into ions
Tomography can be best described as…
the process of imaging a desired structure while blurring of other areas.
What is an example of an acceptable disinfection technique used in dental imaging…
Leaving patient care items in their packaging until they are ready for use.
When preparing the dental imaging area for patient care, what should the DA do…
the radiographic imager should place barriers over radiographic equipment including the exposure button and control panel because there are often hard-to-reach areas that may create reservoirs for pathogens and other microbes.
What best describes the effects of long-term low-dose radiation exposure…
the effect of long-term low-dose radiation exposure can cause changes at the cellular level in the human body that would not be observed for many years.
The difference between acute radiation exposure and chronic radiation exposure is…
the amount of radiation received and the time frame in which it is absorbed.
Identify the density and contrast of an image receptor produced using a high kilovolt or kV setting…
increased density; low contrast (srry but wtf does this even mean?)
In order to prevent cross contamination from a used sensor holder, what is NOT indicated?
the sensor holder can forgo undergoing precleaning practices including the hand scrubbing, automated washing, or the use of an ultrasonic machine if the DA does not see any debris on the item.
Which of the following will appear on dental images as white restorations that commonly appear in the posterior area of the mouth and are examples of indirect restorations:
a) amalgam restorations
b) gold crowns
c) composite restorations
d) porcelain crowns
b) gold crowns
When describing the long axis of a tooth when referring to the paralleling technique, what is true…
the long axis of the tooth divides it into equal halves.
When mounting processed radiographs, which anatomical landmark can assist you in mounting the molar bitewing?
the external oblique
A reversed smile line observed on a panoramic image is likely due to…
position of the patient’s chin is too high
Which of the following is the device that restricts the size and shape of the xray beam?
a) filter
b) collimator
c) barrier
d) film badge
b) collimator
If the kilovolt peak (kVp) setting is lowered, a longer exposure time will be necessary to produce an image with ___ contrast .
high
If a dental x-ray tibe head has a faulty seal, what will result…?
leakage of radiation
What is the most likely reason for a DA to receive a reading on their personal radiation monitoring device?
failture of the DA in following the rules of working with radiation, to include not wearing the badge outside the clinic/practice.
What is a main disadvantage of using digital imaging in dentistry?
the sensor size and thickness
What is true regarding the use of lead aprons and thyroid collars?
The apron should cover from the neck to just above the patient’s knees.
What is correct procedure when using phosphor storage plates (PSPs)?
gather the PSPs, place each PSP in a barrier, capture the images, remove each PSP from its barrier, and allow each PSP to drop into a cup that will be used for transporting the plates to the scanner once all images have been obtained.
Which of the following will appear the most radiopaque on a dental radiograph:
a) composite restorations
b) amalgam restorations
c) gutta percha
d) porcelain crowns
b) amalgam restorations
