RAD 177 Exam 1 Review (Fluoroscopy)

Input phosphor is made up of

• barium iodide

• cesium iodide

• molybdenum

• tungsten rhenium

The function of input phosphor is converting

• X ray to electrons

• X ray to light photons

• electrons to X rays

• light photons to X rays

The function of photocathode is converting

• light photons in to electrons

• electrons into light photons

• X ray to electrons

• electrons to x rays

Which of the following is (are) not a safety mechanism of modern fluoroscopic equipment?

• lead curtain

• pulsed mode

• Bucky slot cover

• high level control

• charge-coupled device

Which of the following is a technical factors might be adjusted by the Automatic Brightness Control (ABC) system?

• mA

• kVp

• time

• FSS

Magnification mode results in ______ spatial resolution and ______ dose to the patient.

• greater, increased

• lower, increased

• lower, decreased

• greater, decreased

What is the primary function of the image intensifier?

• to increase image brightness

• to increase spatial resolution

• to increase image contrast

• to decrease patient dose

If a fluoroscopic unit has bi-focus input phosphor at 30cm/17cm and an exposure is made in 17cm mode, how much is the image magnified?

• 1.76 times

• 0.57 times

• 4.7 times

• 13 times

Which of the following is present in image intensified fluoroscopy but not digital fluoroscopy?

• pincushion distortion

• quantum noise

• artifacts

• ionizing radiation

What can be used to connect the image intensifier to the CCD or camera system?

• fiber optics

• electron guns

• lens systems

• ethernet cables