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Radiology DANB
DANB
| Question | Answer |
|---|---|
| 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 |
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