Radiology

How should a full digital file be sent?

Password-encrypted

What is PID considered?

Non-critical

Which statement is false regarding vertical angulation?

Incorrect vertical angulation results in overlapped contact points.

Which tissue is highly radiosensitive?

Skin

What are the 4 common errors in radiography?

Two for bisecting, two for paralleling.

What is recommended for cleaning and disinfecting?

Utility gloves.

According to the ASC spectrum, safety glasses are:

Not required.

What type of imaging does Cone Beam Computed Tomography (CBCT) use?

3D imaging technology.

What is background radiation?

Always in our environment.

What does effective dose equivalent estimate?

Radiation risk.

Who is infection control for?

For everyone.

What is the correct sequence for radiation injury?

Latent period → period of injury → period of recovery.

What should be done to avoid shadows on a panorex?

Put the tongue to the roof of your mouth.

What is the difference between sterilization and disinfection?

Sterilization destroys, disinfectant reduces.

Is a digital sensor needed to break the chain of infection?

No.

How are receptor holders classified?

Semi-critical.

What may affect PSP plates?

Prolonged light exposure.

What should you do after removing an image receptor?

Wipe it with paper towel or gauze.

Trabecular patterns can appear:

Either radiopaque or radiolucent.

What is the XDP ring color for tooth #19?

Yellow.

What effect does the tongue against the roof of the mouth have during a pan?

Reduces palatoglossal airspace.

What does DHCP stand for?

Dental Healthcare Personnel.

How does advanced decay appear radiographically?

Double triangle halfway through dentin.

Can bitewings locate abscesses?

No.

Why do radiolucent images appear dark?

Less density.

What is the correct head positioning for a pan?

Midsagittal plane perpendicular, Frankfort plane parallel.

What is cone cutting caused by?

Failure to center the central ray.

Why might cervical vertebrae appear on a pan?

Patient is not standing straight.

Where do bitewings primarily detect decay?

Interproximal surfaces (mesial or distal).

How does composite resin appear on X-rays?

Least radiopaque.

Which teeth can initiate a gag reflex?

Maxillary molars.

What should you do to help the gag reflex?

Do not tell the patient to think about gagging.

Who prescribes radiographs?

Dentist.

Which of the following is not part of SI units?

Rem.

Human tissue is composed mostly of?

Water (H2O).

How does the spine appear on X-ray?

Radiopaque.

What do voxels in CBCT capture?

3D dimensions.

What happens if the voxel setting in CBCT is larger?

Decreases spatial resolution and decreases electronic noise.

What does section 4 of the SDS sheet include?

First aid measures.

What are the three planes for CBCT imaging?

Axial, coronal, sagittal.

Where are lateral cephalometric radiographs typically performed?

Ortho office.

What should you use after a radiographic procedure?

Utility gloves to clean surfaces.

What does lamina dura outline?

Root of tooth.

What does CDC recommends about the X-ray button?

Barrier over X-ray button.

How should the Frankfort horizontal plane be positioned?

Parallel to the ground.

What does a low facial landmark on X-ray signify?

Chin tipped too low.

What does positioning too far forward in the focal trough cause?

Teeth to appear blurred and diminished.

What facial bones might appear in a panoramic X-ray?

Zygoma.

What controls the contrast in radiographs?

kVp.

What causes a smile error on a pan?

Chin is too far down.

What does direct supervision mean?

Doctor is in the office.

Which pictograms indicate hazards?

Carcinogenic and eye irritant.

What is short-scale contrast in radiography?

Black and white with few shades of gray.

What should be done if there is excessive vertical angulation?

Decrease angulation.

What to do if there is inadequate vertical angulation?

Increase angulation.

Where are dangerous cysts commonly found?

Third molar area.

What does leaded glass housing in the tube head prevent?

X-rays from escaping tube head.

Where is the median palatine suture seen?

Maxillary anterior PA.

What can increase CBCT artifacts?

Patient movement.

What does the inverted Y on a radiograph indicate?

Intersection of nasal wall and maxillary sinus.

Which technique is not ideal for children?

Paralleling.

What conditions are required for X-rays to be produced?

Electrons, speed, and target.

What can a patient do during a panoramic X-ray?

Stand or sit, must remain still.

What does absorbed dose measure?

Energy deposited in teeth or soft tissue.

How does the stainless steel crown appear on X-ray?

See-through appearance.

Which image is preferred for an abscess on tooth #25?

PA.

How to increase contrast while maintaining density?

Decrease kVp and increase mA.

How fast do PSP plates produce images?

Not almost instantaneously.

What does absence of teeth refer to?

Anodontia.

What is the ALARA principle?

Ethical principle to minimize radiation exposure.

What is the preferred method for sharing digital images?

Cloud.

Do you need a dark room for digital images?

No.

What kind of radiation does lateral cephalometric have?

Least radiation on extraoral film.

What does OSHA stand for?

Occupational Safety and Health Administration.

What effect does increasing mA have on radiograph?

Darkens radiograph.

What does informed consent mean?

Patient understands risks and consents to procedure.

Where is the incisive foramen recorded?

Maxillary anterior between teeth #8 & 9.

What is the function of a collimator?

Reduces size of the beam.

What is true about 3D tomography (CBCT)?

Produces 3D images.

What does the ‘filter’ in radiography do?

Removes low-energy photons.

What should CBCT not be used for?

Proximal caries detection.

What image receptor has the widest dynamic range?

PSP.

Who provides the SDS sheet?

Manufacturer.

What can help prevent the gag reflex?

Salt on tongue.

How are lead aprons classified?

Non-critical.

How does the pulp appear on X-ray?

Radiolucent.

How does an amalgam tattoo appear on a radiograph?

Radiopaque.

What is the preferred image for supernumerary teeth?

Panoramic.

Where are genial tubercles located?

Mandibular anterior.

Where is the infraorbital foramen seen?

Maxillary anterior.

When should occlusal #4 not be used?

Periodontal evaluation.

Which cells cannot repair from radiation?

Genetic cells.

Where is the coronoid process likely recorded?

Maxillary posterior — triangular shape.

What does a rectangular PID reduce radiation by?

70%.

What is acute radiation syndrome (ARS) considered?

Short-term exposure.

Which blood cells are most radiosensitive?

White blood cells.

What does the professional code of ethics govern?

Conduct.

How does mental fossa appear on an X-ray?

Radiolucent depressed area of bone.