ARRT MRI REGISTRY REVIEW QUESTIONS WITH COMPLETE ANSWERS

Half-Fourier


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Due to the symmetry of the matrix to be sampled, a little more than half of
the raw data is necessary to be acquired, reconstructing the remaining data
to complete the image greatly reduces scan time




Slice Thickness


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the thickness of an imaging slice

,Ghosting/Motion/Mismapping occurs in the ____ encoding direction


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Phase




Parenteral


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Intravenous (IV), Intramuscular (IM), Subcutaneous (SC)

any route other than mouth (PO) or rectal




Diffusion


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the movement of atoms or molecules from an area of higher concentration
to area of lower concentration




Tau


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, Time between pulses (btwn 90ºRF - 180ºRF and 180ºRF - echo) in spin echo
(also known as 1/2 TE)




Parallel imaging requires a ____ coil


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Phase Array




A steep gradient allows for ____ slice thickness


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Thin




Depression in the base of skull where the pituitary is located is called the


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Sella Turcica




Time Formula for SE


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