RHS EXAM // PT 3 mine, Radiology pt 1 mine, radiology mine

Which of the following affects the quantity of x-rays being emitted from the tubehead?

mA

When exposing radiographs, what is the minimum distance the operator should stand from the tube head?

6 feet

Duplicating film is coated with

One- sided emulsion

For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must be a minimum of

1.5 mm

Which of the following is a long-term effect of radiation?

Genetic defects

Which of the following would cause elongation on a radiograph?

Insufficient vertical angulation

Which of the following would you adjust to produce wavelengths with the greatest penetrating power?

kVp

The purpose of a grid device on an extraoral cassette is to

Reduce scatter radiation reaching the film

If there are no teeth to serve as guides, which of the following landmarks indicates a maxillary molar area radiograph?

Tuberosity

?????

Fingerprints

After an exposed film has been removed from a patient's mouth, the next step is to

Dry the exposed film

When taking an occlusal radiograph, the film packet should extend from the patient's mouth by approximately

1/8 -1/4 inches.

Blurred radiographic images are often caused by

Patient movement during exposure

During the processing of x-ray film, the removal of the halide portion of the exposed silver crystals is called

Reduction

The time between patient exposure to radiation and the appearance of biological damage is the

Latent period

Which of the following results in a double image radiograph?

Exposing the same film twice

Impacted third molars are best seen with what type of radiograph?

Panoramic

The edentulous radiographic series may include all of the following

Periapicals, Occlusals, Panoramics

Which of the following describes a double-ended film holder used for posterior and anterior teeth?

Eezee-Grip®

Light-colored radiographs commonly result from

Underexposure

The purpose of the aluminum disc in the x-ray tubehead is to

Filter out long wave x-rays from the primary beam.

When mounting periapical radiographs, what information helps to distinguish maxillary molar radiographs from mandibular molar radiographs?

The maxillary sinus outline is visible

To help desensitize the tissue prior to film placement, the dental assistant should

rub a finger along the tissues where the film touches.

Which of the following tissues is the most highly radiosensitive?

Skin

While exposing x-ray films, radiation deflecting off the patient's head is called

Scatter radiation

A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient

Not placing the tongue against the palate

The most common reason for taking bitewing radiographs is to evaluate

Interproximal caries

The most important step the dentist can take in protecting patients from x-radiation is to

Properly prescribe radiographs

Dental healthcare personnel who are pregnant can expose radiographs during the

Entire pregnancy

When the tubehead drifts, the first step the dental assistant should take is to

Stop using the machine

Which of the following PID produces the greatest amount of secondary radiation?

Closed-end plastic cone

Which organization regulates disinfectants and chemical sterilants?

CDC

Which of the following extraoral radiographs is used to evaluate impacted teeth, large lesions and fractures of the mandible?

Lateral jaw projection

Which part of the x-ray machine should be covered or disinfected after each patient?

Tubehead

Which of the following conditions will result in a radiographic image that is too light?

Weak developing solution

The most commonly used radiographic exposure for a 3-year-old patient is

Bitewing

Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should

Decrease

The Buccal Object Rule is used to determine if a foreign body is located in which direction?

Lingual to buccal

Dental healthcare personnel can BEST shield themselves from radiation during patient exposure by standing behind

A dry wall barrier

Which of the following can be used to measure excessive occupational exposure?

Film badge

Supernumerary teeth are best detected using what type of film?

Panoramic

Which of the following quality control tests evaluates safelighting in the darkroom?

Coin test

Which of the following describes how most radiographic carious lesions appear?

Radiolucent

Which of the following condition may mimic caries on an intraoral radiograph?

Root resorption

Added filtration in the x-ray tubehead protects the

Patient

Processing tanks should be cleaned when the

Solutions are changed

The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is

5.0 rem per year.

Which of the following is a measurement of tissue damage from x-ray energy?

Radiation absorbed dose

The Frankfort Plane is an imaginary plane passing through the

External auditory meatus to the floor of the orbit.

Which of the following cells exposed to radiation may be associated with leukemia?

Somatic

Inside the film packet, the film is wrapped with a/an

Black paper sheet

The population most susceptible to radiation damage is

Infants

On a radiograph, the anterior alveolar crest normally appears

Pointed and sharp

Storing unexposed radiographic film in high humidity conditions may cause

Film fog

How often should protective clothing be changed in an oral healthcare setting?

When visibly soiled

Prior to exposing dental radiographs on a visually impaired patient, the dental assistant should

use touch to explain the equipment and procedure.

A panoramic image appears to have a "reverse smile" when the

Frankfort plane is angled upward.

Which of the following affects the speed of the electrons emitted from the tubehead?

kVp

A film with damaged emulsion will appear

Cracked

Which of the following landmarks is useful when mounting films in the maxillary central area?

Anterior nasal spine

Patients should wear a thyroid collar during which type of radiographic exposure?

Intraoral radiograph

Which of the following is the first step in processing radiographic film?

Developing

The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an

Occlusal

The American Dental Association recommends that radiographs be mounted with the embossed dots

All facing in the same direction

Which of the following is most essential when labeling the film mount?

Patient name

The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs is to protect the patient from

Scatter radiation

During radiographic exposures, semi-critical items that must be sterilized or disposed of include

Film holding devices

When documenting a lesion found on a radiograph, all of the following should be described

Size, appearance, and location

The median palatal suture is visible on which of the following radiographs?

Mandibular anterior periapical

A cephalometric radiograph is PRIMARILY used to evaluate

Lateral jaw development

The normalizing device can be used to monitor

Developer strength

In dental radiography, the purpose of the fixer solution is to

Remove unexposed silver halide crystals

Contrast in a radiograph is primarily controlled by

kVp

Radiation injury results from

Exposure

On a full mouth series with eighteen films, how many anterior films are exposed?

6

What is adjusted t to create wavelengths with the greatest penetrating power?

KVP

The edentulous radiographic series may include all the following EXCEPT

bitewings

An underexposed image will appear

light

The most common radiographic exposure used to evaluate a dental implant on an adult is

Periapical

Which digital image receptor is the longest?

2

The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an

occlusal

To assist the patient in controlling the gag reflex,

use a distraction technique

During patient exposure, protection from radiation for the operator includes

standing behind a wall

How can you stabilize the biteblock on a partially edentulous patient?

use a cotton roll

Which exposure is used to diagnose interproximal caries?

bitewing

The amount of radiation and exposure time needed to produce a diagnostic radiograph is best determined by

exposure time

Which protection technique is used to minimize x-radiation exposure to the operator?

structural shielding

If a patient's gag reflex is stimulated during the radiographic procedure,

apply distraction techniques

To produce ionizing radiation, an atom must

add an electron

The Frankfort Plane is an imaginary plane passing through the

external auditory meatus to the floor of the orbit.

The annual maximum accumulated dose (MAD) of radiation for dental assistant is based on which of the following calculations?

When placing periapical images in a template, what information helps to distinguish maxillary molar images from mandibular molar images?

maxillary sinus outline is visible.

The degree of radiation injury can be determined by the amount of

tissue irradiated

Reuse of digital sensors requires

must carefully remove sleeve and dispose in general waste

According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is

1/4 as intense

What causes elongation on a radiograph?

insufficient vertical angulation

The most commonly used radiographic exposure for a 3-year-old patient is a

bitewing

The aluminum disc in the x-ray tubehead

filter out long wave x-rays from the primary beam.

What are common uses for a CBCT 3D image?

determining bone structure and tooth orientation

Using a lead apron with a thyroid collar during dental radiographs protects the patient from

scatter radiation