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MR BOARDS PREP 1 EXAM 2024/2025 WITH 100% CORRECT ANSWERS
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Which of the following parameter adjustments reduce the overall SNR in an MR image? correct answersA Decrease in TR Reduction in Pixel Size Decrease in FOV Increase (widening) of the receiver Bandwidth Decrease in NEX Increased #ETL ~all reduce SNR ~ Gradient slew rate is the rate of spee...

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  • 21 de septiembre de 2024
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  • 2024/2025
  • Examen
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  • mr boards prep 1

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  • MR BOARDS PREP 1
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MR BOARDS PREP 1

Which of the following parameter adjustments reduce the overall SNR in an MR image? correct
answersA Decrease in TR

Reduction in Pixel Size

Decrease in FOV

Increase (widening) of the receiver Bandwidth Decrease in NEX

Increased #ETL

~all reduce SNR ~



Gradient slew rate is the rate of speed of ascent or descent of a gradient from zero to its __________
amplitude correct answers(to its) maximum (amplitude)



FORMULA: Calculate the PIXEL area for the following sequence: TR 4000, TE 120, FOV 36cm, 408 x 512
matrix, 2 NEX, ETL 12 correct answers0.62 mm2



Phase encoding step is performed ______________ frequency encoding



(A. During frequency encoding B. In place of frequency encoding C. Prior to frequency encoding D.
Following frequency encoding) correct answersDURING frequency encoding



In a Fast Spin Echo (FSE) sequence, acquired with a long TE, yielding T2 weighted images, scan time can
be reduced by: correct answersUsing longer ETL



When imaging the female pelvis, the most optimal view for evaluation of the ovaries is the: correct
answersCoronal



What effect would using a steep slice select slope and/or narrow bandwidth have on slice thickness?
correct answersSlices will be thin

,Referencing the White Paper on MRI safety, individuals identified as "Level 1" personnel include: correct
answersThose with limited MRI safety training



Shimming in MRI can be performed by all the following EXCEPT: correct answersTurning the shim coil off
and on rapidly



Healthcare workers generally practice ___________, which states the "goal is to do no harm." correct
answersBeneficence



The energy used to form MRI images is ____________ the patient's tissues. correct answersEmitted from



A reduction in FOV will yield a decrease in _____, but an increase in spatial resolution. correct
answersSNR



An increase in TE will yield a _______________ correct answersdecrease in SNR



The receiver bandwidth (rBW) affects: correct answersonly SNR & CHEMICAL SHIFT



FORMULA: The smallest object that can be resolved in an image acquired with a 24cm FOV and a 272 x
272 matrix is _________ mm. correct answers0.88mm (24 x10 240/ 272= 0.88mm)



In a medical malpractice lawsuit, the ______ must be able to prove medical malpractice. correct
answersPatient plaintiff



Which of the following is NOT affected by changing the slice thickness? correct answersThe T2 contrast



The source of infection where pathogens thrive in numbers sufficient to cause a threat is known as a:
correct answersReservoir



As the TR is increased,

a. SNR is increased

, b Available number of slices is increased

c T2 information is maximized correct answersONLY SNR is increased & T2 info is maximized



FORMULA: The PIXEL size of the images which result from a 3D acquisition using a 260mm FOV, a 320 x
320 matrix, 32 slices and a volume of 64 mm is: ________ correct answers0.88x0.88mm (FOV ./.
matrix=pixel size)



FORMULA: The smallest object that can be resolved in an image acquired with a 24cm FOV and a 272 x
272 matrix is _________ mm. correct answers0.88mm



FORMULA: Which parameter combination will yield the best spatial resolution? correct answersA. 3mm
slice thickness, 192 x 256 matrix B. 3mm slice thickness, 224 x 256 matrix C. 3mm slice thickness, 256 x
256 matrix D. 5mm slice thickness, 192 x 256 matrix E. 3mm slice thickness, 208 x 256 matrix



When performing MRI to rule out brain tumors, the weighted images acquired to evaluate the extent of
lesion involvement, after injection of gadolinium, are: ________ correct answersT1 weighted



_______ sequences are performed to suppress CSF and aid in the detection of demyelination. correct
answersFLAIR



All comprise the biliary tree EXCEPT:

A. Left hepatic duct

B. Right hepatic duct

C. Common bile duct

D. Splenic duct

E. Pancreatic duct correct answersSplenic duct



Gradient echo sequences requiring high signal from fluid are known as all of the following EXCEPT:

A. T2* gradient echo

B. Steady-state gradient echo

C. Coherent gradient echo

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