9:48 .11 5G I Back BMED3501_2A_2021.... 1-21. What equation governs the behavior of NMR spins? Maxwell equation b Wave e

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9 48 11 5g I Back Bmed3501 2a 2021 1 21 What Equation Governs The Behavior Of Nmr Spins Maxwell Equation B Wave E 1 (77.46 KiB) Viewed 24 times

9:48 .11 5G I Back BMED3501_2A_2021.... 1-21. What equation governs the behavior of NMR spins? Maxwell equation b Wave equation c. Bloch equation 1-22. What is the NMR resonance frequency of protons at 1 Tesla? 4.26 MHZ b 42.6 MHz 426 MHz 1-23. Which statement is true in clinical MRI? a. T2 is typically shorter thun T1 for most soft tissues. b. Conventional MRI can visualize the lung structure well. c. All hydrogen atoms have cxactly the same Gyromagnetic ratio. 1-24. Which statement is true in clinical MRI? a. Superconducting magnet can generate high magnetic field strength, yielding stronger NMR signals thus better imaging quality in general. h. Linear gradient coils are mainly for the purpose of manipulating the spatial distribution of the magnetic field, ie, the resonance frequency at each location in the space. c. Both a and b above are correct. 1-25. Which statement is true in MRI? a. Both FID and SE signals can be generated by a single RF pulse. b. FID signal is generated by 1 RF pulse while SE signal is generated by 2 RF pulses. C. FID signal is generated by 2 RF pulses while SE signal is generated by 3 RF pulses 2 2. One new cancer diagnostic imaging method was applied to obtain images from a total of 80 normal and abnormal subjects. Images were then used by five readers or radiologists (A, B, C, D, and E) for medical diagnoses. All results are listed below. (10 points) BMED3501 Page 6 of 9