Final answer:
In an MRI magnet design, the superconducting cylindrical coils that generate the magnetic field are closest to the patient, surrounding them during the scan for optimal imaging.
Step-by-step explanation:
In the cross-sectional view of an MRI magnet design, the coils that are closest to the patient are part of the superconducting cylindrical coil system. These coils generate a strong and uniform magnetic field which is essential for the imaging process. When a patient undergoes an MRI scan, they are positioned inside this cylindrical solenoid, effectively surrounded by the coils. The large magnetic field created by the coils affects the spin of protons in the patient's body, and the signals emitted as the protons align or relax are captured and used to create detailed images of the body's internal structures.
It is crucial to the operation of the MRI that these coils are in close proximity to the patient for maximum effectiveness, as the strength of the magnetic field and the resolution of the images can be affected by distance. The coils are contained within the scanner enclosure, ensuring safety while providing essential functionality in the MRI process.