Xray Tube

Xray Tube

This quiz examins parts of the xray tube, a special type of diode, part from notes, part from worksheet

published on November 15, 201124 responses 1
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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