Mri Registry (Mri Safety) Examverified | Latest Update A+ Pass

MRI registry (MRI safety) EXAMVERIFIED | LATEST UPDATE A+ PASS ACR recommended Zone 1 signage designates an area intended for _________________. A. Screened MRI patients/personnel B. General public C. Screened MRI patients under constant direct supervision of trained MR personnel D. Unscreened MRI patients - Answer- B. General public The intensity limit for a static magnetic field by the FDA for the entire population is? A. 5 Gauss B. 1.0Tesla C. 3.0 Tesla D. 4.0 Tesla E. 8.0 Tesla - Answer- D. 4.0 Tesla The intensity limit for a static magnetic field in clinical use is limited by the Food and Drug Administration (FDA) to 4.0 tesla (T)field strength for the entire population.(Clinical imaging in patients over one month of age and above limited to 8Tesla) ACR recommended Zone 4 signage designates an area intended for: A. Screened MRI patients/personnel B. General public C. Screened MRI patients under constant direct supervision of trained MR personnel D. Unscreened MRI patients - Answer- C. Screened MRI patients under constant direct supervision of trained MR personnel The fringe magnetic field: A. Is eliminated by magnetic shielding B. Is eliminated by shimming C. Poses no safety risks if proper shielding is utilized D. Can cause nearby medical devices to malfunction - Answer- D. Can cause nearby medical devices to malfunction What type of pulse sequence transmits the most RF to the patient and consequently can potentially have more SAR restrictions? A. Gradient echo B. Fast spin echo C. Inversion recovery D. Spin echo - Answer- B. Fast spin echo Fast spin echo sequences utilize ETL (echo train lengths/180° RF pulses) to reduce scan time, at the expense of increased RF power/absorption to the patient Which of the following is regulated by the FDA? A. Billable amounts per procedure B. Aperture of the magnet construction C. Resolution maximums D. Acoustic noise - Answer- D. Acoustic noise FDA safety levels for RF exposure during MR examination are defined by SAR restrictions, which are imposed to reduce the risk of: A. Panic attacks or anxiety during the MR procedure B. Induction of current within the surface receiver coils C. Systemic and/or thermal injury to patient D. Gradient induced acoustic noise overexposure - Answer- C. Systemic and/or thermal injury to patient ACR recommended Zone 2 signage designates an area intended for: A. Screened MRI patients/personnel B. General public C. Screened MRI patients under constant direct supervision of trained MR personnel D. Unscreened MRI patients - Answer- D. Unscreened MRI patients The FDA recommends posting warning signs to indicate the _________ line. A. Mendoza B. 5 Gauss C. 3 Tesla D. 0.5 Gauss - Answer- B. 5 Gauss FDA guidelines dictate a level of concern when RF energy absorption produces an increase in body temperature of: A. 0.1° Fahrenheit B. 1° Fahrenheit C. 0.1° Celsius D. 1° Celsius - Answer- D. 1° Celsius ACR recommended Zone 3 signage designates an area intended for: A. Screened MRI patients/personnel B. General public C. Screened MRI patients under constant direct supervision of trained MR personnel D. Unscreened MRI patients - Answer- A. Screened MRI patients/personnel The magnetic field that the MR technologist is most exposed to would be the: A. Static magnetic field B. Radiofrequency field C. Time varying magnetic field D. Shim Coil - Answer- A. Static magnetic field Risk factors of MR exposure with regards to SAR include all of the following EXCEPT: A. Cardiovascular disease B. Hypotension C. Obesity D. Geriatric patients - Answer- B. Hypotension 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) A. 5 Gauss B. 1.0Tesla C. 3.0 Tesla D. 4.0 Tesla E. 8.0 Tesla - Answer- E. 8.0 Tesla