12 Questions
What is the expected image on a radiograph exposed to 70 kVp, 100 mA, 100 ms from a full wave 3 phase x-ray unit?
Increased contrast and density
Which of the following will serve to increase effective energy of the x-ray beam?
Increase in kV
What is indicated by visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp?
The 0.5 sec time station is inaccurate
When comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and time combinations, this is part of which QC test?
Linearity
In which portion of the x-ray circuit is a step-down transformer located?
Filament Circuit
If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, what is the voltage across the secondary coil?
7700 V
Which of the following will serve to increase the effective energy of the x-ray beam?
Increase in kV
What is indicated by visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp?
The 0.5 sec time station is inaccurate
When comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and combination, this is part of which QC test?
Linearity
In which portion of the x-ray circuit is a step-down transformer located?
Filament Circuit
What will serve to increase the effective energy of the x-ray beam?
Increase in added filtration
If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, what is the secondary voltage?
7700 V
Study Notes
Radiograph Image Characteristics
- A radiograph exposed to 70 kVp, 100 mA, 100 ms from a full wave 3 phase x-ray unit is expected to have a certain image appearance.
X-ray Beam Energy
- Increasing the kVp will serve to increase the effective energy of the x-ray beam.
- Other factors that can increase the effective energy of the x-ray beam will also be explored.
Spinning Top Test
- Visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp indicates a specific outcome.
Quality Control (QC) Tests
- Comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and time combinations is part of a QC test.
X-ray Circuit Components
- A step-down transformer is located in the x-ray circuit.
Transformer Calculations
- If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, the voltage across the secondary coil is 15,750 V.
Test your knowledge of radiography with this quiz covering topics such as x-ray unit settings, image production, and factors affecting the effective energy of the x-ray beam.
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