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Radiology DANB


Which structure would not be seen as a maxillary landmark on a panoramic film? mental foramen
Which chemical agent in the developing solution rapidly develops the gray tones of the radiograph? elon
How should the film be placed when exposing a mandibular occulsal radiograph? white side up between the occulsal surfaces of the maxillary and mandibular teeth
Which situation will appear radiopaque on a radiograph? cement base under a restoration
How would a completed root canal appear on processed radiographs? radiopaque
Which pathologic condition would appear radiopague on a radiograph? salivary stone
Which chemical(s) develop the silver halide crystals? hydroquinone and elon
Which exposure error results in the herringbone effect? film reversal
What is the purpose of risk management programs? to reduce the chance of a malpractice suit
What technique should the dental assistant use on a patient with a gag reflex? try to reduce tactile stimuli
Which type of exposure enables viewing of an area in three planes? computed tomography
Which type of radiolucent lesion is characterized by a localized mass of granulation tissue around the apex of a nonvital tooth? periapical granuloma
What is the result of white light leaks in the darkroom? fogging of the film
With faster F-speed film, a single intraoral film results in a surface skin exposure of ____ miliroentgens. 100
Which radiographic exposure is the film of choice for the extraoral examination of the upper or lower jaw? panoramic
Which of the following could be a couase of a decreased film density when using anautomatic processor? developer contamination
How does static electricity appear on a developed film? black branching lines
Which of the following is an advantage of digital radiography? Digital radiography eliminates the need for a darkroom and processing procedures
An overdeveloped film may be caused by which error? excessive development time
How often should the soultions in an automatic processor be checked and replenished? daily
The most important factor in obtaining quality panoramic radiographs is proper patient positioning
What is the term for a supernumerary tooth that forms along the midline? mesiodens
Quality control tests that should be applied to dental office radiology standards should include which procedure? regular maintenance
In which two lengths are PIDs typically available? 8 and 16 inches
Which is the correct sequence for processing x-ray film in an automatic processor? develop rinse fix rinse dry
Exposing intraoral radiographs, when the patient's right is on your left, the identification dot on the film will be positioned where? facing out and toward the incisal/occulsal
The basic elements of a quality administration plan should include which of the following? description of the plan with assignment of duties
When using the bisecting technique, the imaginary angle that is bisected is formed between the long axis of the tooth and which structure? long axis of the film
A film that has been fogged will show which result? decreased contrast
In which exposure will the genial tubercle be seen? mandibular central
What is the most common cause of poor defininition in a radiograph? movement
In panoranmic radiography, the ______ rotates around the patient. tubehead and film
When would tomography be used in dentistry? scanning of the temporomandibular joint
What will occur when voltage is increased? electrons move from the cathode to the anode with more speed
If the radiographic processing time is too short, how will the film appear? light
What role do radiographs play in conprehensive patient care? vital component to
Which radiographic exposure is the film of choice for the intraoral examination of large areas of the upper or lower jaw? occlusal
Which term refers to the blurring that surrounds the edges of a radiographic image? penumbra
What is the traditional statute of limitations for adult radiographs? 10 years
How does the median palatien suture appear in a radiograph? radiolucent
Which regressive alteration of tooth structure appears radiolucent and occurs within the crown or roots of a tooth? internal resportion
In addition to the patient's name, what other information should be placed on the film mount? date of exposure
Which radiograph shows the bony and soft tissue areas of the facial profile? cephalometric
Which radiology item is replaced by a digital sensor? intra oral dental film
Why would a devleoped film be clear? failure to turn the X-ray machine on
Which of the following statements about automatic processors is not correct? daylight loader is required
Safe light leaks in the darkroom can be checked by a coin test. How often should this be completed? once a month
Which method is used to stabilize the film when exposuing an occlusal radiograph? the patient gently bites on the surface of the film
who is responsible for the final and definitive interpretation of dental radiographs? dentist
Which statement is not true about a bitewing radiograph? The central ray of the x-ray beam is directed through the contacts of the teeth using a vertical angulation of +40 degrees
Increasing milliamperage alone results in a film with: increased density
The dental radiographer should stand ___ degrees to the primary beam. 90-135
The maximum permissable dose for nonoccupationaly exposed persons is ____ rem/year. 0.1
Radiation injuries that are not seen in the person irradiated but that occur in future generations are termed: genetic effects
Which of the following is used as a collimator? lead plate
An organ that, if damages, diminishes the quality of an individual's live is termed a: critical organ
Identify the kilovotage range for most dental x-rays machines: 65-100kv
Indirect radiation injury occurs when: x-ray phtons are absorbed and form toxins
The overall blackness or dearkness of a film is termed: density
Which of the following statements is correct? Long term effects are seen with small amounts of radiation absorbed in a long period.
Which of the following is true of film badges? Film badges should be worn at waist level when exposing radiographs
Which of the following describes the use of a filter in a dental x-ray tubehead? filters remove low energy x-rays
Which of the following is the recommended size of the beam at the patient's face? 2.75 inches
Machines operating at 70 kVp or lower require ___ mm aluminum. 1.5
Identify the milliamperage range for dental radiography: 7-15 ma
Which of the following restricts the size and shape of the x-ray beam? collimator
Which of the following is most susceptible to inoizing radiation? small lymphocyte
Which of the following terms describes the dose of radiation that hte body can endure with little or no chance of injury? maximum permissible dose
Radiation produced with high kilovoltage results in: short wavelengths
Which of the following factors contributes to radiation injury? total dose, dose rate, age
In dental radiography, the quantity of radiation produced is controlled by: Both milliamperage and exposure time
The traditional unit for measuring x-ray exposure in air is termed: the roentgen
What is the dose at which leukemia induction is most likely to occur? 5000 mrads
Which of the following describes the function of filtration? reduces low energy waves
The sensitivity of tissues to radiation is determined by: Mitotic activity Cell diffentiation Cell metabolism
The amount of radiation exposure an individual receives varies depending on which of the following factors? film speed, collimation, technique
In dental radiography, the quality of the x-ray beam is controlled by: kilovoltage peak
If kilovoltage is decreased with no other variations in exposure factors, the resultant film will: appear lighter
Identify the term that describes how dark and light areas are differentiated on a film: contrast
The latent period in radiation bilogy is the time between: exposure to x-radiation and clinical symptoms
Which of the following position indicating devices is most effective in reducing patient exposure? rectangular pid
Which of the following traditional units does not have an SI equivalent? the roentgen
A radiograph that has many light and dark areas with few shades of gray is said to have: high contrast
Which of the following is not a component of inherent filtration? a leaded cone
Increading milliamperage results in an increase in: Temperature of the filament and number of x-rays produced
What is the greatest contributor to artificial radiation exposure? medical radiation
Direct radiation injury occurs when: x-ray photons hit critical targets within a cell
Machines operation above 70 kVp require ____ mm aluminum. 2.5
Which of the following is the most effective method of reducing patient exposure to radiaiton? fast films
A radiograph that has many light and dar areas with few shades of gray would be produced with: low kilovoltage
Which of the following is used only for x-rays? the rad
Identify the unit of measurement used to describe the amount of electric current flowing through the x-ray tube: volt
Which of the following statements is incorrect? x-radiation is not harmful to living tissues
A single intraoral radiograph (D-Speed film, 70 kVp, long PID) results in a mean surface exposure of: 250 mR
Which of the following is considered radioresistant? mature bone cells
A higher kilovoltage produces x-rays with: Greater energy levels shorter wavelengths more penetrating ability
The maximum permissable dose for an occupationally exposed person is ___ rems/year. 5
What is the average dose of background radiation received by an individual in the United States? 150-300 mrads
The formula for the maximum accumulated dose is: MAD= (N-18) x 0.05 Sv/year or MAD=(N-18) x 5 rems/year
A free radical: is an uncharged molecule has an unpaired electron in the outher shell is highly reactive and unstable
Created by: 1513845543