Xray Tube This quiz examins parts of the xray tube, a special type of diode, part from notes, part from worksheet acceb published on November 15, 2011 Stacked 1/15 What material is alloyed with tungten in the target to increase strength? bismuth rhodium molybdum rhenium 2/15 Which materials are used for special xray tube target in mammography? Hint: 1 choice molybdenum and rhodium iridium and copper tungsten and iron 3/15 What are the three main parts of the xray imaging system? Hint: 1 choice anode, cathode, and focusing cup anode, cathode, high voltage generator xray tube, protective housing, and high voltage generator xray tube, high voltage generator and image receptor 4/15 The prime reason for a glass envelope of an xray tube is to: Hint: 1 choice provide a vacuum cool the tube control leakage radiation 5/15 The protective housing of an xray tube is designed to: Hint: 1 choice reduce hazard of leakage radiation reduce hazard of scatter radiation control isotropic xray emission 6/15 Diagnostic xray tube is an example of which of the following? Hint: 1 choice cathode diode anode electrode 7/15 Large filament is used during radiography when the heat load is: Hint: 1 choice low and visibility of detail is important high and visibility of detail is important low and high visibility of detail is important 8/15 In most xray tubes, there are two filaments to: Hint: 1 choice ensure saturation current produce higher energy xrays provide two electrodes provide two focal spots 9/15 The focusing cup: Hint: 1 choice Is on the positive side of the xray tube is slightly positive with respect to the filament is the grid in a grid-controlled x-ray tube is usually made of thoriated tungsten selects the filament 10/15 Once filament temperature becomes adequate, a further small rise in filament temperature will cause tube current to: Hint: 1 choice decrease just a bit decrease very much increase just a bit increase very much not change 11/15 The cathode beam of an xray tube is the: Hint: 1 choice current that heats the filament focused electron beam within the tube off-focus radiation primary xray beam secondary radiation 12/15 The xray tube current: Hint: 1 choice controls xray energy flows through both filaments at the same time is controlled by the filament current is the current that flows through the filament 13/15 The cathode is Hint: 1 choice a diode designed to supply heat once of the two parts of a diode part of the target positively charged 14/15 When a filament burns out: Hint: 1 choice it should be replaced within 30 days the filament current goes to maximum filament current goes to zero 15/15 The space charge effect: Hint: 1 choice is more pronounced at high kvp is more pronouncedat low ma limits kvp occurs in the vicinity of the anode occurs in the vicinity of the cathode
