18 Questions
What is a major advantage of using small coils in MRI?
Higher SNR and potential for higher resolution
What is the primary benefit of using phase array coils in MRI?
Combination of benefits from small and large coils
What is the consequence of using large coils in MRI with small fields of view?
Increased likelihood of aliasing artefact
What is the primary function of the array processor in the MRI system?
Fourier transformation of raw data
In which type of examination would a large coil be more suitable?
Chest or abdomen examination
What is the primary function of gradient coils in MRI systems?
To produce controlled variations in the main magnetic field for spatial localization
What is the purpose of the operator control panel in the MRI system?
To control all system functions and view images
Why is it important to ensure that RF coil cables are not looped or touching the patient or the bore of the magnet?
To reduce RF absorption and ensure coil safety
What is the purpose of shim coils in MRI systems?
To compensate for inhomogeneities in the main magnetic field
Why are RF coils critical for image optimization in MRI systems?
Because they receive and transmit RF signals to optimize image quality
What is the purpose of correctly tuning the RF coils in MRI systems?
To receive optimum signal from the patient
How are RF coils typically tuned in modern MRI systems?
Auto-tuned for each scan
What is the purpose of SCIC in MRI?
To enhance image contrast and reduce noise
What is the result of non-uniform signal in MRI?
Signals from the surface of the patient are heightened
What is the advantage of phased array coils?
They provide a larger field of view and increased anatomy coverage
How do parallel imaging coils work?
By combining signals from multiple coils to create one image
What is the advantage of using multiple coils in parallel imaging?
Improved uniformity across a whole volume
What is the maximum number of coils and receivers that can be grouped together in parallel imaging?
Four coils and receivers
Learn about the different types of coils used in Magnetic Resonance Imaging (MRI) systems, including gradient coils, radiofrequency coils, and shim coils, and their roles in spatial localization, signal transmission, and compensation for magnetic field inhomogeneities.
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