MRI CAMRT Exam With Correct Questions And Answers 2024

MRI CAMRT Exam With Correct Questions
And Answers 2024


Is .SNR .proportional .or .inversely .proportional .to .voxel .volume .- .correct
.answer.Proportional




3 .fields .used .in .MRI .- .correct .answer.-static .magnetic .field
-TVMF .(gradient .field)
-RF .field

3 .main .types .of .magnets .used .- .correct .answer.-Superconducting .(most .common_
-Resistive
-Permanent

FDA .limits .for .the .3 .fields .in .MRI .- .correct .answer.Static .field: .2T
TVMF: .3T/s
RF .field: .
- .does .not .cause .an .increase .in .temperature .of .more .than ..5 .deg .C .or .any .body .part .of .1
.deg .C

-SAR .does .not .exceed .1W/kg .avg .over .25% .of .whole .body .for .longer .than .15mins
-SAR .does .not .exceed .2W/kg .avg .over .25% .of .whole .body .for .durations .of .15mins .or .less

Eddy .currents .are .caused .by .- .correct .answer.TVMF .(gradients)

What .are .Eddy .Currents .- .correct .answer.Small .currents .induced .in .the .body .via .the
.TVMF




Biological .effects .of .the .TVMF .- .correct .answer.-Fibrillation
-Electroshock
-Visual .phosphenes
-Peripheral .nerve .stimulation

SAR .meaning .and .units .- .correct .answer.Specific .Absorption .Rate .

W/kg- .Watts/kilogram

, Which .field .is .responsible .for .tissue .heating .and .temperature .increase .- .correct
.answer.The .RF .field




How .are .cardiac .pacemakers .affected .in .MRI .- .correct .answer.Affected .by .all .3 .fields

-Static .field .affects .the .operation .and .also .exerts .torque
-TVMF .and .RF .field .can .interfere .with .circuitry

3 .types .of .ferromagnetic .materials? .- .correct .answer.iron, .cobalt, .nickel

Level .1 .MR .Personnel .- .correct .answer.Passed .MR .safety .education .requirements

Level .2 .MR .Personnel .- .correct .answer.Those .more .extensively .trained .and .educated .in
.MRI .safety




How .many .times .should .a .non .emergent .patient .be .screened .- .correct .answer.Twice,
.once .verbally .with .a .level .2 .MR .Tech




How .should .emergent .patients .and .their .non .MR .personnel .be .screened .- .correct
.answer.Once




How .should .unconscious/ .unresponsive .patients .be .screened .- .correct .answer.- .A .family
.member .should .fill .out .the .screening .form

-If .no .reliable .history .can .be .obtained .and .MR .exam .cannot .wait .they .must .undergo .plain
.film .radiography .of .head/neck, .chest, .abdomen/pelvis, .upper .arms .and .thighs




How .should .children .and .teens .be .screened .- .correct .answer.Twice, .once .in .front .of
.parents .and .once .without




MRI .and .pregnant .patients .- .correct .answer.No .known .harmful .effects .but .risk .vs .benefit
.assessment .should .be .made




MRI .contrast .and .pregnant .patients .- .correct .answer.Should .not .be .routinely .given .to
.pregnant .patients .but .risk .vs .benefit .assessment .needed




What .is .the .spatial .field .gradient .- .correct .answer.The .variance .in .the .fixed .static .field
.surrounding .the .scanner, .the .manufacturerer .supplies .a .SFG .map




Lenz .forces .- .correct .answer.Faradays .law .states .that .a .changing .magnetic .field .will
.induce .a .current .in .a .conductor, .Lenzs .law .states .that .the .induced .current .will .generate .a

.secondary .field .that .opposes .the .original .field




TVMF .(gradient) .effects .- .correct .answer.-Induced .voltages
-Auditory .considerations

Normal .temperature .ranges .- .correct .answer.Adult: .36.7-37.4 .C