MODULE 12 - Mobile Radiography Review

Flashcards about mobile radiography principles and practices, covering equipment, safety, clinical considerations, and digital radiography advantages.

What are the three main components of any radiography unit?

Operating console, x-ray tube, and generator.

What type of radiography is most commonly performed with mobile units?

Chest radiography.

What should the technologist do before moving the mobile unit?

Unplug it and carefully retract the charging cord.

How does the technologist move the mobile unit?

By grasping the horizontal drive handle which activates the power-assisted drive system.

What is NOT available on mobile radiography units that affects exposure selection?

Automatic Exposure Control (AEC).

What are the two main mobile power supply designs used today?

High-Frequency Battery-Powered Units and Capacitor-Discharge Units.

How does a capacitor-discharge unit work?

It uses battery power to charge a high-voltage capacitor which then discharges to the x- ray tube.

What is a major drawback of capacitor-discharge units?

Inconsistent kV during exposure and potential for radiation leakage.

What are the advantages of HF battery-powered units?

More consistent radiation output and no radiation leakage.

How long can it take to fully recharge a dead battery-powered unit?

Up to 10 hours.

How far must the technologist stand from the mobile unit during exposure?

At least 2 meters (6 feet) away.

What must the technologist wear during mobile radiography?

A lead apron, and a thyroid collar if available.

How should other patients near the imaging site be protected?

Use lead aprons or strips draped over bed rails or between beds.

What must the technologist say before making an exposure in a ward?

“X-ray in Room ___!” to warn nearby staff and visitors.

What must the beam direction always avoid?

It must never be directed at the technologist.

When is mobile radiography appropriate?

When the patient's condition makes it unsafe to transport them to the imaging department.

What are some clinical risks of transporting critically ill patients to the radiology department?

Dislodging tubes, loss of respiratory support, and loss of ward staff.

Why is image quality often lower in mobile radiography?

Limited positioning space, use of AP projection, grid avoidance, and obstructive equipment.

Should mobile imaging be done for staff convenience?

No, it should only be done when patient transport poses risk.

What is the primary benefit of DR portable units over CR?

Faster workflow, immediate image review, lower exposure, better resolution, and wider dynamic range.