Small metal objects are prohibited in the MRI scan room (Zone 4). Pens, bobby pins, hairclips, etc. must be carefully screened because they can become projectiles that can injure subjects and staff, and damage the MRI equipment. Watches cannot be brought into the MRI scan room (Zone 4), as the magnetic field will render them inoperable. Devices with magnetically recorded information such as credit cards, bankcards, or data stored on magnetic tape will be erased if brought into Zone 4. Volunteers and visitors will be provided with storage areas to store personal items such as watches, wallets, and jewelry in the control room, located in Zone 3. Larger personal items, such as purses or backpacks, may be stored in the staff lockers in the hallway adjacent to the MRI Suite, located in Zone 2.