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chapter 2,3,6 part 2
| Question | Answer |
|---|---|
| Which of the following statements is true of the use of voltage in dental x-ray equipment? | Dental x-ray equipment requires the use of 60 to 70 kilovolts. |
| A beam alignment device can be used to help the dental radiographer position the PID in relation to the _____________ and the receptor. | tooth |
| Exposure time is measured in | impulses. |
| (1) Density is the overall darkness or blackness of a dental image. (2) When the kilovoltage is increased while other exposure factors remain constant, the resultant image exhibits a decreased density and appears lighter. | he first statement is true; the second statement is false. |
| When contrasted with the use of 70 kV for dental x-rays, the use of 60 kV produces | less penetrating dental x-rays with longer wavelength. |
| The kVp represents | the maximum or peak voltage of an alternating current. |
| The position-indicating device (PID) is an extension of the | tubehead |
| Which of the following changes will increase x-ray beam intensity? | Decreasing the source-to-film distance |
| Which of the following intraoral receptor holders is a disposable Styrofoam bite-block? | Stabe bite-block |
| Which of the following statements is true of the receptor holder? | It is required when using the intraoral paralleling technique. |
| The quantity of the x-rays produced is controlled by | milliamperage. |
| You have been using a dental x-ray machine that has a 4-inch PID. Your new machine has an 8-inch PID. Given that all exposure factors remain the same, according to the inverse square law, the resultant beam would be ___________ as intense. | one quarter |
| When kilovolt is increased, a | higher energy x-ray beam with increased penetrating ability results. |
| You are on a mission trip, and your responsibility is to take radiographs. You are using a handheld x-ray machine, digital sensors, and a receptor holder. Sterilization is not available. Which of the following receptor holders would you use? | A Stabe bite-block. |
| In dental radiography, the term ________ is used to describe the mean energy or penetrating ability of the x-ray beam. | quality |
| The contrast is high and you are looking for periodontal disease. You using a DC machineand you have control your settings. You have a 60- to 70-kV range and a 6- to 8-mA range. You had the kV set at 60, the mA set at 7 | Increase kV to 70. |
| According to the inverse square law, if the length of the PID is halved, the resultant beam is ___________ as intense. | one quarter |
| An image with "low" contrast | is useful for the detection of periodontal or periapical disease and has many shades of gray. |
| Milliamperage regulates the _________ of electrons produced at the cathode filament. | quantity |
| When the kilovoltage is increased | electrons move from the cathode to the anode with more speed. |
| You are going to take dental images on your patient. He is larger than average. What machine setting adjustment should you make prior to taking dental images? | Increase impulses. |
| Aluminum filters | reduce the intensity of the x-ray beam. |
| The Rinn XCP is a | beam alignment device. |
| Which of the following are beam alignment devices? | An XCP |
| Aluminum filters are used to remove _______-energy, ________ wavelength x-rays. | low; longer |
| ______________ is a measurement of force that refers to the potential difference between two electrical charges. | Voltage |
| According to the inverse square law, the intensity of radiation is __________ proportional to the ______________ from the source of radiation. | inversely; square of the distance |
| Features of the Stabe bite-block include | a slot for receptor retention. |
| (1) As kilovoltage, milliamperage, and time increase, x-ray beam intensity decreases. (2) As distance and filtration increase, the intensity of the x-ray beam increases. | Both statements are false. |
| The _____________ allow(s) for positioning of the tubehead. | extension arm |
| You have your patient in the chair, you have placed the receptor in your patient's mouth, and you have positioned the position-indicating device. Which of the following should you do next to take the x-rays? | Push the exposure button. |
| _________________ regulate(s) the manufacture and installation of dental x-ray equipment. | The federal government |
| When lower kilovoltage settings are used, an image with ____ will result. | high contrast |
| A _____________ eliminates the need for the patient to stabilize the receptor. | receptor holder |
| In regard to increasing density | an increase in either kV or mA will increase density. |
| During an exposure | the exposure button is firmly depressed until the preset exposure time is completed. |
| Which of the following statements is true of wavelength in reference to radiation? | X-rays with longer wavelength have less penetrating power. |
Created by:
Francisco711