Download ARMRIT Practice Test Part 2: Clinical Applications Questions and Answers 2024 and more Exams Advanced Education in PDF only on Docsity! ARMRIT Practice Test Part 2: Clinical Applications Questions and Answers 2024 For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Decreasing TE will: a. Decrease the # of allowable slices. b. Increase the # of allowable slices. c. Increase scan time. d. Decrease scan time. - Correct Answer-b. Increase the # of allowable slices. A linear relationship between frequency and position is superimposed on Bo by the Gp. The H protons' relative precessional frequencies determine: a. Phase coherence. b. Phase encoding. c. Phase shifts. d. Rephasing - Correct Answer-c. Phase shifts. For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Increasing the FOV will: a. Increase SNR. b. Decrease SNR. c. Decrease Matrix. - Correct Answer-a. Increase SNR A gradient is employed exposing the patient's body to a series of increasing or decreasing magnetic field strengths for slice selection. In what relation to the slice is this gradient? a. Anti-parallel. b. Perpendicular. c. Parallel. d. Oblique. - Correct Answer-b. Perpendicular. In spatial localization, the "logical" Slice Selection Gradient is symbolized: a. Gz b. Gy c. Gx - Correct Answer-a. Gz b. STIR. c. Gradient-echo. d. FLAIR. - Correct Answer-c. Gradient-echo. In a horizontal field magnet, what is the primary Gs for a Sagittal Slice? a. Gx b. Gy c. Gz - Correct Answer-a. Gx When selecting a volume of slices, which method for providing spatial encoding is employed? a. 3DFT. b. FFT. c. FT. d. 2DFT. - Correct Answer-a. 3DFT. Spatial Resolution is an image quality factor determined by _________ and __________. a. field strength/receiver b. coil c. flip angle/TE d. TR/NEX e. slice thickness/pixel size - Correct Answer-e. slice thickness/pixel size The purpose of the first use of metal ions in MRI enhancement, like gadolinium, is to: a. Increase relaxation time for H in tissue. b. Decrease relaxation time for H in tissue. c. Increase signal on T2 images. d. Decrease signal on T1 images. - Correct Answer-b. Decrease relaxation time for H in tissue. Tissues that have low (short) relaxation times have: a, Lower relaxation rates. b. Higher relaxation rates. c. Low T2*(star) values. d. High T2 value. - Correct Answer-b. Higher relaxation rates. For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Decreasing Slice thickness will: a. Increase SNR. b. Decrease SNR. c. Increase Matrix. - Correct Answer-b. Decrease SNR. The pixel size formula is: a. Pixel size = FOV x Matrix. b. Pixel size = FOV x NEX. c. Pixel size = FOV / Matrix. d. Pixel size = FOV / NEX - Correct Answer-c. Pixel size = FOV / Matrix. When selecting only one slice at a time during a pulse sequence, which method for providing spatial localization is employed? a. 3DFT. b. FFT. c. FT. d. 2DFT. - Correct Answer-d. 2DFT. FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Increasing TE will: a. Decrease SNR and decrease Slice#. b. Increase SNR and increase Slice#. c. Increase scan time. d. Decrease scan time. - Correct Answer-a. Decrease SNR and decrease Slice#. What year was the first MRI enhancement agent approved for clinical use? a. 1988 b. 1946 c. 1973 d. 1981 - Correct Answer-a. 1988 Which is a normally enhancing structure after the administration of MRI I.V. gadolinium? a. Intervertebral disc. b. Choroid plexus. c. Cerebellum. d. Auditory nerves. - Correct Answer-b. Choroid plexus. MRA stands for: a. Magnetic Resonance Alignment. b. Magnetic Resonance Assessment. c. Magnetic Resonance Angiography. d. Magnetic Resonance Angioplasty. - Correct Answer-c. Magnetic Resonance Angiography. Which of the following parameter settings best describes a proton density image? a. Short TR/ short TE b. long TR/ long TE c. Short TR/ long TE d. long TR/ short TE - Correct Answer-d. long TR/ short TE In spatial localization, the "logical" phase encoding gradient is symbolized? a. Gz b. Gy c. Gx - Correct Answer-b. Gy
