MIDTERM EXAM

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PSY 5065 - fMRI: Hands-on Training

B) Label the slice-select, read-out, and phase-encode gradient axes for the two pulse

sequences illustrated below. Describe each pulse sequence as FLASH or EPI, Spin

Echo or Gradient Echo. (2 points total - 1/6 each for gradient labels, 1/4 for each FLASH

vs. EPI, and 1/4 for each SE vs. GE)

Pulse sequence 3.B.1: _________________________________________

N = 4

RF

G ______

DAC

Pulse sequence 3.B.2: _________________________________________

RF

G ______

DAC

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PSY 5065 - fMRI: Hands-on Training B) Label the slice-select, read-out, and phase-encode gradient axes for the two pulse sequences illustrated below. Describe each pulse sequence as FLASH or EPI, Spin Echo or Gradient Echo. (2 points total - 1/6 each for gradient labels, 1/4 for each FLASH vs. EPI, and 1/4 for each SE vs. GE) Pulse sequence 3.B.1: _________________________________________ N = 4 RF G ______ G ______ G ______ DAC Pulse sequence 3.B.2: _________________________________________ RF G ______ G ______ G ______ DAC

PSY 5065 - fMRI: Hands-on Training C) Draw on the grid provided below the k-space trajectory for the pulse sequence in 3.B.2. Make sure to label the phase-encode direction. (It might help to number the gradients to match k-space excursions; no need to be precise once you get to the readout lines.) (1 point) Sequence 3.B.2

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