Show:
ARTIFACTS
IMPLANTS
PHYSICS
SCREENING
POTPOURRI
100

A common artifact that occurs when the FOV is smaller than the body part being imaged.

Aliasing, or wrap around artifact

100

This Medtronic implant must be located in the right ventricle for an MR conditional scan

Micra pacemaker

100

The abundant element in the human body that is imaged in MRI

Hydrogen

100

This staff level is allowed to go into Zone 4 unmonitored but not allowed to permit staff into Zone 4

Level 1 MR Personnel (Yellow)

100

What is the SAR limit for a scan in first level operating mode?

4W/kg

200

Results from field inhomogeneities caused by RF interferences; occurs along the frequency encoding direction

Zipper artifact

200

An implant labeled as ____ requires strict manufacturer guidelines be followed for safe scanning

MR conditional

200

1 Tesla equals how many Gauss

10,000 Gauss

200

In addition to patients, these people should be screened prior to entering Zone 3

Everyone

200

RF shielding in the exam room walls is normally composed of this

Copper

300

A type of noise where a portion of the main imaged object is replicated or smeared into other areas

Ghosting

300

These types of implants do not contain mechanical components and do not require power to operate

Passive implants

300

B-0 refers to this

The static magnetic field

300

How many screening devices/methods are employed throughout the MRI departments at CHOA

3 methods (Handheld wands, Solo device and Halos)

300

This is who has the final decision regarding policies and procedures in MRI Safety

MRMD

400

Also known as truncation artifact, this shows as a series of fine parallel lines adjacent to sharp tissue interfaces; occurs often in spinal cord imaging

Gibbs artifact

400

Using this type of coil is sometimes a condition for safe scanning of an implant because it focuses RF to just the anatomy within that coil

Transmit receive coil

400

B-1 refers to this

The Radio Frequency Energy

400

This is the final step to be performed prior to going into Zone 4 as a confirmation that all other steps have been completed

Safety Time-Out

400
This device is placed on certain equipment that may have some components that are ferrous, though labeled as MRI conditional and permissible in Zones 4 up to a certain point

GaussAlert

500

This specific implant may require the patients head to be wrapped by an ENT prior to their MRI

Cochlear Implant

500

These two specific energies are only activated during active scanning

RF and Gradient fields

500

The event surrounding this individuals death in 2001, sparked an official release of the ACR white papers on MRI Safety along with the creation of MRSO, MRSE and MRMD roles

6 y.o Michael Colombini