C.7.6.18.2 Respiratory Synchronization Module

Table C7.6.18-2 specifies the attributes of the Respiratory Synchronization Module.

Table C.7.6.18-2RESPIRATORY SYNCHRONIZATION MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Respiratory Motion Compensation Technique (0018,9170) 1C Applied technique to reduce respiratory motion artifacts. Defined Terms: NONE BREATH_HOLD REALTIME = image acquisition shorter than respiratory cycle GATING = Prospective gating TRACKING = prospective through-plane or in-plane motion tracking PHASE_ORDERING = prospective phase ordering PHASE_RESCANNING = prospective techniques, such as real-time averaging, diminishing variance and motion adaptive gating RETROSPECTIVE = retrospective gating CORRECTION = retrospective image correction Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
Respiratory Signal Source (0018,9171) 1C Signal source from which respiratory motion is derived. Defined Terms: NONE BELT = includes various devices that detect or track expansion of the chest NASAL_PROBE CO2_SENSOR NAVIGATOR = MR navigator and organ edge detection MR_PHASE = phase (of center k-space line) ECG = baseline demodulation of the ECG Required if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED and Respiratory Motion Compensation Technique (0018,9170) equals other than NONE. Otherwise may be present if Image Type (0008,0008) Value 1 is DERIVED and Respiratory Motion Compensation Technique (0018,9170 equals other than NONE.
Respiratory Trigger Delay Threshold (0020,9256) 1C Respiratory trigger threshold in percent of the chest expansion for the frame relative to the last Respiratory-Peak. See C.7.6.16.2.17.1 for further explanation. Required if Respiratory Motion Compensation Technique (0018,9170) equals other than NONE, REALTIME or BREATH_HOLD and if Image Type (0008,0008) Value 1 is ORIGINAL or MIXED. May be present otherwise.
Respiratory Trigger Type (0020,9250) 1C Characteristic of the respiratory signal used to the define the respiratory triggering. Defined Terms: TIME AMPLITUDE BOTH Required if the value is not TIME, may be present otherwise.