https://www.vetnurse.co.uk/nursing/w/vet-nurse-revision-2/672/radiography-equipmentWelcome to the Revision Guide for Student Nurses (Part II) by Vanessa Bird VN. This guide contains notes, self-test questionnaires and practical tasks to help you through your exams (Level 2/3 NVQ, and beyond), and to use as a reference afterwards.Apren-USTelligent Community 10https://www.vetnurse.co.uk/nursing/w/vet-nurse-revision-2/672/radiography-equipmentTue, 21 Apr 2009 07:12:14 GMT1a0763ec-3885-442c-853e-6cef656dfec5:8cd9725b-537d-459c-8bf5-df61394d4a30Arlo Guthriehttps://www.vetnurse.co.uk/nursing/w/vet-nurse-revision-2/672/radiography-equipment#commentsCurrent Revision posted to Revision Guide For Student Nurses - Part 2 by Arlo Guthrie on 4/21/2009 7:12:14 AM<br /> <p><span class="h1img"><strong>QUESTIONS</strong></span></p> <ol class="wikiextraspace"> <li>What is the output of most portable x-ray machines? </li> <li>What is the maximum output of most mobile x-ray machines? </li> <li>What is the maximum output of most fixed x-ray machines? </li> <li>What is the purpose of the line voltage compensator? </li> <li>Larger x-ray machines may possess a device which automatically controls electrical fluctuations; what is this device called? </li> <li>What is the minimum distance away from the tube head that the exposure button may be situated? </li> <li>What is the function of the kilovoltage (kV) control? </li> <li>What is another term for the kilovoltage applied across the tube? </li> <li>When would it be sensible to select a high kV setting? </li> <li>What is the function of the milliamperage (mA) control? </li> <li>What is the milliamperage also known as? </li> <li>What unit denotes the product of the tube current (mA) and the length of exposure? </li> <li>In small x-ray machines, the kV may be directly linked to the mA. Why might this be disadvantageous? </li> <li>If the tube current (mA) is increased, how is the exposure time (mAs) affected? </li> <li>Why is it sensible to use the largest possible mA for a particular kV setting? </li> <li>If the kV were increased by 10, by how much would you need to reduce the mAs in order to produce a film of similar diagnostic quality to the exposures used initially? </li> <li>What is meant by the film focal distance (FFD)? </li> <li>State the inverse square law. </li> <li>What is a suitable FFD for most portable x-ray machines? </li> <li>In addition to FFD, what other parameters must be kept constant when calculating exposures? </li> <li>What device is used for measuring the depth of tissues? </li> <li>What is the purpose of a grid? </li> <li>How does a grid work? </li> <li>List the 4 main types of stationary grid. </li> <li>What is the name of the expensive, but very efficient moving grid which is built into the radiography table-top? </li> <li>Why is a focussed grid preferable to a parallel grid? </li> <li>What important factors must be taken into account when a grid is used? </li> <li>What is meant by the &quot;grid factor&quot;? </li> <li>Define grid ratio. </li> <li>What is the main disadvantage of grid use (apart from cut off) and how might this be rectified? </li> <li>What is the purpose of intensifying screens? </li> <li>Where are the intensifying screens located? </li> <li>What colour light is emitted by calcium tungstate screens? </li> <li>What colour light is emitted by rare earth phosphor screens? </li> <li>Why are rare earth screens preferable to those of calcium tungstate? </li> <li>Describe how you would clean an intensifying screen. </li> <li>What film type is suitable for use with calcium tungstate screens or blue light emitting rare earth phosphors? </li> <li>What film type is suitable for use with green or blue light emitting rare earth phosphors? </li> <li>When would non-screen film be utilised? </li> <li>What is the main disadvantage of non-screen film? </li> <li>What is the main advantage of a fast film-screen combination? </li> <li>What is the main disadvantage of a fast film-screen combination? </li> <li>What is the main advantage of a slow film-screen combination? </li> <li>What is the main disadvantage of a slow film-screen combination? </li> <li>List 6 important factors regarding the storage of unexposed radiographic film. </li> </ol><div style="clear:both;"></div>