4. Assume an MRI scanner imaging 'H with the following specifications: Bo = 1.5 T and the Z-gradient (Gz) is set to 25 µT/cm. Assume that with the Z gradient on, the magnetic field strength is Bo at location Z = Zc: a. We need to acquire an MR slice at position Z = Z. - 5 cm. What is the required RF excitation pulse center frequency (in MHz) for the slice selection pulse? b. If a 5 mm slice thickness is required, what is the RF bandwidth (in kHz) needed for the slice selection pulse? %3D
4. Assume an MRI scanner imaging 'H with the following specifications: Bo = 1.5 T and the Z-gradient (Gz) is set to 25 µT/cm. Assume that with the Z gradient on, the magnetic field strength is Bo at location Z = Zc: a. We need to acquire an MR slice at position Z = Z. - 5 cm. What is the required RF excitation pulse center frequency (in MHz) for the slice selection pulse? b. If a 5 mm slice thickness is required, what is the RF bandwidth (in kHz) needed for the slice selection pulse? %3D
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Transcribed Image Text:4. Assume an MRI scanner imaging 'H with the following specifications:
Bo = 1.5 T and the Z-gradient (Gz) is set to 25 µT/cm.
Assume that with the Z gradient on, the magnetic field strength is Bo at location
Z = Zc:
a. We need to acquire an MR slice at position Z = Z. - 5 cm. What is the
required RF excitation pulse center frequency (in MHz) for the slice selection
pulse?
b. If a 5 mm slice thickness is required, what is the RF bandwidth (in kHz)
needed for the slice selection pulse?
Expert Solution
Step 1
- The width of a continuous band of frequencies is the difference between the upper and lower frequencies.
- Typically, it refers to the passband bandwidth or the baseband bandwidth, depending on the context.
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