Podcast
Questions and Answers
What is the ideal scenario for the main magnetic field (B0) across the imaging volume?
What is the ideal scenario for the main magnetic field (B0) across the imaging volume?
- Having the same strength but different direction at all points
- Having different strength and direction at all points
- Having different strength but same direction at all points
- Having the same strength and direction at all points (correct)
What can field inhomogeneities cause in MRI images?
What can field inhomogeneities cause in MRI images?
- Increased signal-to-noise ratio
- Distortions, artifacts, and signal loss (correct)
- Reduced geometric distortions and improved image contrast
- Improved image quality and higher diagnostic accuracy
Why is field homogeneity crucial in spectroscopic MRI (MRS)?
Why is field homogeneity crucial in spectroscopic MRI (MRS)?
- For accurate measurement and quantification of metabolite concentrations (correct)
- To reduce geometric distortions and image warping
- To improve image contrast and diagnostic accuracy
- To increase the signal-to-noise ratio
What is the process of adjusting the magnetic field to improve homogeneity?
What is the process of adjusting the magnetic field to improve homogeneity?
What can variations in magnetic field strength lead to in MRI images?
What can variations in magnetic field strength lead to in MRI images?
What can field inhomogeneities result in?
What can field inhomogeneities result in?
What is the primary function of shim coils in MRI systems?
What is the primary function of shim coils in MRI systems?
What type of shim coils compensate for linear field gradients along the x, y, and z axes?
What type of shim coils compensate for linear field gradients along the x, y, and z axes?
What is the purpose of shim coils in maintaining field homogeneity during MRI image acquisition?
What is the purpose of shim coils in maintaining field homogeneity during MRI image acquisition?
What is the advantage of dynamic shim coils over other types of shim coils?
What is the advantage of dynamic shim coils over other types of shim coils?
What is the result of inadequate shim coil compensation in MRI image acquisition?
What is the result of inadequate shim coil compensation in MRI image acquisition?
What is the location of shim coils in an MRI system?
What is the location of shim coils in an MRI system?
What is the primary reason for optimizing shim settings in MRI systems?
What is the primary reason for optimizing shim settings in MRI systems?
In functional MRI studies, why is field homogeneity crucial?
In functional MRI studies, why is field homogeneity crucial?
What is the main advantage of active shimming in MRI?
What is the main advantage of active shimming in MRI?
Which of the following techniques is used to adjust the magnetic field gradients to compensate for field variations?
Which of the following techniques is used to adjust the magnetic field gradients to compensate for field variations?
What is the primary consequence of inaccurate field mapping in quantitative MRI?
What is the primary consequence of inaccurate field mapping in quantitative MRI?
What is the purpose of dynamic shimming in MRI?
What is the purpose of dynamic shimming in MRI?
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