MRI Safety and Emergency Procedures

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What is the primary mechanism by which Gadolinium decreases T1 relaxation times?

By reducing the viscosity of the solution

By aligning the rotation of molecules with the Larmor frequency (correct)

By increasing the temperature of the solution

By increasing the magnetic field strength

What is the primary hazard associated with magnetic quench?

Loud noise and warning message

Dense white vapor and helium meter dropping (correct)

Tilting of the image on the image screen

All of the above

What is the purpose of introducing contrast media in MRI scans?

To increase the magnetic field strength

To selectively affect the T1 and T2 relaxation times in tissues (correct)

To increase the temperature of the solution

To reduce the viscosity of the solution

What is the effect of Gadolinium on the signal intensity of T1 weighted images?

It increases the signal intensity Signup and view all the answers

What is the characteristic property of a solution that affects the rotation of molecules?

Frequency of rotation Signup and view all the answers

What should be done in the event of a magnetic quench?

Evacuate the patient and personnel from the scan room and close the scan room door Signup and view all the answers

What is a potential risk associated with the use of Gadolinium-based contrast agents in MRI?

Renal toxicity in individuals with impaired kidney function Signup and view all the answers

What is a primary concern related to patient comfort during MRI scans?

Claustrophobia and anxiety related to enclosed spaces Signup and view all the answers

What design feature in modern MRI scanners is expected to reduce the number of failed examinations?

Shorter and wider bores Signup and view all the answers

What is a method used to improve patient comfort and reduce movement during MRI scans?

Head coil mirrors to maintain visible contact with staff outside the scanner Signup and view all the answers

Why are emergency preparedness protocols necessary in MRI facilities?

To respond to medical emergencies during scans Signup and view all the answers

What is a possible strategy used to alleviate patient anxiety during MRI scans?

Playing music through headphones Signup and view all the answers

What is an important detail to share with the patient before an MRI exam?

The duration of the procedure Signup and view all the answers

Why is it important for the technologist to remember the patient's name?

To establish a rapport with the patient Signup and view all the answers

What instruction should be given to the patient regarding breathing or swallowing during an MRI exam?

Rehearse holding their breath and swallowing at specific times Signup and view all the answers

Which of the following patients is unsuitable for an MRI exam?

A patient with an aneurysm clip Signup and view all the answers

What is a potential hazard for patients with certain metallic objects during an MRI exam?

Heating or movement of the metal object Signup and view all the answers

What should patients be checked for before an MRI exam?

MR incompatible objects Signup and view all the answers