The number of sites that can be done at a time for an MRI depends on the type of exam coil, some coils can only perform one site such as the head coil.
If a head coil is used, only a head MRI can be performed, but many sequences such as magnetic susceptibility testing, diffusion function imaging, and spectral analysis can be performed on one site.
There are also some combined coils such as head and neck coils that can perform head examinations and also neck examinations. In addition to this, there are also spinal coils that can perform cervical, thoracic and lumbar spine examinations.
It is recommended that you should consult your doctor before the examination, choose the examination area according to your needs, and then choose which coil to use according to the examination area.