Chapter 4 Post-Test: MRI Pulse Sequences Exam Questions With Correct Answers

Chapter 4 Post-Test: MRI Pulse Sequences Exam Questions With Correct Answers. _____________ is NOT a characteristic of the steady state gradient echo pulse sequence - answerA 180* RF pulse spin-interactions Which of the following may be T1-Weighted? 1. A spin-echo image 2. An inversion recovery image 3. A gradient echo image - answer1. A spin-echo image 2. An inversion recovery image 3. A gradient echo image (1,2,& 3) As the TE of a gradient echo sequence is varied, ____ cause fat and water to have signal intensities which cycle from similar to different. a. magnetic susceptibility differences between tissue b. magnetic homogenieties c. phase effects of chemical shift d. spin-spin interactions - answerC. Phase effects of chemical shifts Consider a dual contrast SE pulse sequence in which the 90* RF pulse is applied at time = 0 ms, the center of the first echo forms at time = 15 ms,