equipment safety Flashcards
The FDA recommends posting warning signs to indicate the _________ line.
5 Gauss
: FDA safety levels for RF exposure during MR examination are defined by SAR restrictions, which are imposed to reduce the risk of:
Systemic and/or thermal injury to patient
FDA guidelines dictate a level of concern when RF energy absorption produces an increase in body temperature of:
1° Celsius
Risk factors of MR exposure with regards to SAR include all of the following EXCEPT:
Hypotension
What type of pulse sequence transmits the most RF to the patient and consequently can potentially have more SAR restrictions
Fast spin echo
The fringe magnetic field
Can cause nearby medical devices to malfunction
Which of the following is regulated by the FDA?
Acoustic noise
RF energy is:
: Low energy, non-ionizing radiation
ACR recommended Zone 1 signage designates an area intended for
General public
ACR recommended Zone 2 signage designates an area intended for:
Unscreened MRI patients
ACR recommended Zone 3 signage designates an area intended for:
Screened MRI patients/personnel
ACR recommended Zone 4 signage designates an area intended for:
Screened MRI patients under constant direct supervision of trained MR personnel
The magnetic field that the MR technologist is most exposed to would be the:
Static magnetic field
: Image 63 represents ___________ labeling
MR conditional
An implant with the label seen in Image 63 would require:
Strict manufacturer guidelines be followed (field strength, scan parameters, duration) to ensure patient safety
Image 64 represents ________ labeling
MR safe
An implant with the label seen in Image 64 would require:
No restrictions on MR imaging approach
: Image 65 represents ___________ labeling
MR unsafe
An implant with the label seen in Image 65 would require
A different imaging modality be used as the implant is unable to enter the magnetic field
The intensity limit for a static magnetic field in clinical use is limited by the FDA to what field strength? (Clinical imaging in patients over one month of age and above)
8.0 Tesla
The intensity limit for a static magnetic field by the FDA for the entire population is?
4.0 Tesla
