Replacing BRM-D (Short) RF Body Coil

Prerequisites

The RF body coil cartridge is a Field Replaceable Unit (FRU) that mounts inside the gradient coil (also a FRU). It is available in 1.0T and 1.5T versions. If the RF coil fails, it must be removed from the gradient coil and replaced. Since the replacement procedures for the RF and gradient coils are closely related, references are made below to the epoxy-filled gradient coil replacement procedure where instructions for removal of similar parts (for example, the bridge) can be found. While a portion of the following procedure can be accomplished by one person (connecting/disconnecting various cables, etc.), replacing a failed RF body coil requires more than one person.

note:

Only trained and qualified engineer can execute this procedure.

1 Unpacking BRM-D (Short) RF Body Coil

Procedure

  1. A new Cardiac RF body coil is packed in a shipping container (trunk) that is strapped to a pallet. Unstrap the shipping container from the pallet and remove the RF body coil from the trunk. (The process is reversed when preparing the defective RF body coil for return.)
  2. See Figure 1 through Figure 3 to remove the replacement coil.

    Figure 1. Tilt RF Coil Case and Roll Off Pallet

    Figure 2. Move RF Coil Case to Final Location and Set Case Horizontally

    Figure 3. Open RF Coil Case and Remove New Coil

2 Replacing BRM-D (Short) RF Body Coil

Procedure

  1. Remove the RF Body coil from the CRM without using the RF tracks, which are too thick to use. Use pieces of smooth, stiff material (sheets of film work well) to easily slide the RF coil out of the Gradient Coil. See Figure 4 through Figure 14 for removing and replacing the BRM-D RF Body Coil.

    Figure 4. Loosening BRM-D (Short) RF Body Coil Overview

    Figure 5. Loosening BRM-D (Short) RF Body Coil Detail

    Figure 6. Release the Latch Assembly

    Figure 7. Latch Assembly Detail

    Figure 8. Release the RF Constraints

    Figure 9. Removing BRM-D (Short) RF Body Coil

    Figure 10. Installing BRM-D (Short) RF Body Coil

    Figure 11. Installing the BRM-D (Short ) RF Body Coil

    Figure 12. Positioning the BRM-D RF Body Coil

    Figure 13. Installing the RF Constraints (Additional Detail)

    Figure 14. Securing BRM-D (Short) RF Body Coil

  2. Complete remaining installation steps per Gradient Coil Installation Procedure.
  3. Return the failed RF coil to the shipping crate, reversing the steps used to remove the replacement coil in Unpacking BRM-D (Short) RF Body Coil.
  4. Route RF cable along left side of the plate, securing in position using cable mounts (PN 46-208747P1) and cable ties (PN 46-252283P68) on front support plate.

    Figure 15. Route RF cable

  5. Connect the RF cable J3/J4 which is coming up from body coil to cable 2018/2019( D-D bias cable) which is coming up from under the magnet.

    Figure 16. RF cable Connection

    note:

    Do not have a loop or slack when connecting the D-D bias cable to the body coil cable.