Fluoroscopy Quiz

Fluoroscopy is primarily used to:

• Produce static images

• Produce real-time moving images

• Produce 3D images

• Produce tomographic slices

The main advantage of fluoroscopy over radiography is:

• Lower patient dose

• Real-time imaging

• Better spatial resolution

• Short exposure time

The image intensifier is used in fluoroscopy to:

• Increase image brightness

• Reduce X-ray production

• Improve sound transmission

• Enhance spatial resolution only

The input phosphor of the image intensifier is made of:

• Cesium iodide

• Sodium iodide

• Calcium tungstate

• Zinc sulfide

The output phosphor of the image intensifier is made of:

• Zinc cadmium sulfide

• Cesium iodide

• Sodium iodide

• Calcium tungstate

The purpose of the photocathode in an image intensifier is to:

• Convert X-rays to light

• Convert light to electrons

• Focus the image

• Accelerate electrons

The electrons in an image intensifier are accelerated by:

• Magnetic field

• Electrostatic lenses

• High voltage potential

• Light photons

The typical accelerating voltage in an image intensifier is about:

• 5–10 kV

• 25–35 kV

• 50–60 kV

• 100–150 kV

The brightness gain of an image intensifier is the product of:

• Flux gain × Minification gain

• Flux gain ÷ Minification gain

• Input gain × Output gain

• Voltage × Current

Flux gain is due to:

• Increased light photon energy

• Increased electron acceleration

• Decreased image size

• Optical coupling