Why are all MRI units shaped like cylinders?

The cylindrical shape of MRI units is primarily designed to accommodate the human body and all its parts effectively. This design allows for a spacious interior that facilitates the positioning of patients, regardless of their size or the area of the body being scanned. The circumference of the cylinder provides enough room for different body types and ensures that a wide range of anatomical structures can fit inside without discomfort or constraint.

Additionally, the design helps to optimize the magnetic field produced by the MRI machine, which is essential for achieving high-quality images. The uniformity of the magnetic field within a cylindrical space contributes to the effectiveness of the imaging process. This design choice is predominantly centered around patient comfort and ensuring comprehensive coverage of the body during scans, which is essential for accurate diagnostics and treatment planning.