• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA30B82040GYZ
  • Topic ID: id_2013010 Version: 2.7
  • Date: Apr 23, 2020 8:36:13 PM

Auto coil prescription coil configurations

Receive element groups

The elements within a coil are typically related to each other based on physical characteristics of the coil and customer use cases. In a static coil configuration, coil configurations were statically defined as combinations of these elements. For dynamic coil configuration, the elements are collected in "Receive Element Groups" (REG)s based on the physical or use case characteristics.

REGs can be organized into groups such as:
  • Rows (e.g. PA and AA coils)
  • Columns (e.g. rotatable coils such as AIR AA)
  • Rings (head coils)
  • Left vs right (e.g. breast coils)
  • Smaller segments such as the bill on the HNA coil
  • Other groupings as dictated by the coil
Figure 1. Auto coil prescription receive element group overview

The dynamic coil configurations are then built from these REG building blocks.

Parts of a dynamic coil configuration

A dynamic clinical coil configuration includes a local (imaging) coil mode and full coil mode.

The full coil mode is dynamically generated using all of the possible Receive Element Groups (REG)s contained in the coils that are connected, enabled by the user, and that can be acquired simultaneously. The full coil mode is used by the auto coil calibration in prescan to determine sensitivity data for all coil elements. REGs used in the full mode are stored in the DICOM tag (0043, 10C1).

The local (imaging) coil mode is dynamically generated using the REGs selected by the Auto Coil Prescription (ACRx) algorithm or from the manual mode user interface (research and service only). It is automatically recomputed as needed based on changes to the prescription and whether a new auto coil calibration is acquired. REGs used in the local mode are stored in the DICOM tag (0043, 10C2).

Figure 2. DICOM tag

REGs for some common coils

Below are the REGs for some common coils.

Figure 3. 40 channel spine posterior (GE40chGEMPA) coil receive element groups
Figure 4. 16 channel body anterior (GE16chTDIAA) receive element groups
Figure 5. 19 channel head neck (GE19chGEMHNUFace) receive element groups
Figure 6. Hand wrist, breast, and knee coil receive element groups

How to find a list of receive element groups

The REGs are shown in the coil user interface when it is in service mode.
Figure 7. Coil user interface in service mode

REGs in bold are those that the ACRx algorithm would select.

The REGs can also be listed using the command line utility: coilInfo getConnectedRegs.

Cdata_reg_name = GE1chHead

Cdata_reg_desc = Bird Cage

Cdata_reg_uid = GE1chHead;GE1chHead;P1

Cdata_service = 0

Cdata_plug_name = GE1chHead

Cdata_port_name = P1

Cdata_plug_desc = Head T/R

Cdata_reg_name = GE40chGEMPA-R2.5

Cdata_reg_desc = Row 2.5

Cdata_reg_uid = GE40chGEMPA-R2.5;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R0.5

Cdata_reg_desc = Row 0.5 - Magnet end

Cdata_reg_uid = GE40chGEMPA-R0.5;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R2

Cdata_reg_desc = Row 2

Cdata_reg_uid = GE40chGEMPA-R2;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R1.5

Cdata_reg_desc = Row 1.5

Cdata_reg_uid = GE40chGEMPA-R1.5;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R2L

Cdata_reg_desc = Row 2 - Left

Cdata_reg_uid = GE40chGEMPA-R2L;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R1

Cdata_reg_desc = Row 1

Cdata_reg_uid = GE40chGEMPA-R1;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R2R

Cdata_reg_desc = Row 2 - Right

Cdata_reg_uid = GE40chGEMPA-R2R;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R1L

Cdata_reg_desc = Row 1 - Left

Cdata_reg_uid = GE40chGEMPA-R1L;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R3.5

Cdata_reg_desc = Row 3.5

Cdata_reg_uid = GE40chGEMPA-R3.5;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R1R

Cdata_reg_desc = Row 1 - Right

Cdata_reg_uid = GE40chGEMPA-R1R;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch

Cdata_reg_name = GE40chGEMPA-R4R

Cdata_reg_desc = Row 4 - Right

Cdata_reg_uid = GE40chGEMPA-R4R;GE40chGEMPA;E

Cdata_service = 0

Cdata_plug_name = GE40chGEMPA

Cdata_port_name = E

Cdata_plug_desc = Spine Posterior 40ch