Final answer:
The high cost types of injury can and have occurred during the MRI scanning process.
Step-by-step explanation:
The two major disadvantages of MRI scans are high cost and the need for shielding from the magnetic signals. MRI scanners use powerful electromagnets, which require the scan room to be shielded. Additionally, patients undergoing MRI scans must be enclosed in a metal tube-like device for the duration of the scan, which can be uncomfortable and impractical.
Patients with iron-containing metallic implants cannot undergo MRI scanning as it can dislodge these implants. However, the development of "open" MRI scanning has partially overcome these problems by not requiring patients to be entirely enclosed in the metal tube.
So therefore the two major disadvantages of MRI scans are high cost and the need for shielding from magnetic signals. Patients must be enclosed in a metal tube-like device during the scan, which can be uncomfortable. However, the development of "open" MRI scanning has partially addressed these issues.