Image Production: Chapter 21 - Anode Bevel and Focal Spot
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14 Terms
Anode Bevel
The angle of the target surface of the anode in relationship to a vertical line drawn perpendicular to the long axis of the x-ray tube
Anode Bevel
This affects…
Effective Focal Spot (line focus principle)
Distribution of x-ray intensity within the beam (anode heel affect)
what gives best detail and better spatial resolution?
Small Focal Spot
Line Focus Principle
Sharpness of detail…
Size of projected/effective focal spot is crucial for sharpness
Line Focus Principle
Focal Spot is determined by:
Size of the filament (cathode side)
angle of the anode bevel
if anode bevel was 45 degrees, the effective focal spot would be identical to the beam of electrons from the filament
in diagnostic x-ray it is MUCH steeper than that @ 15-17 degrees