Respiratory triggering
Description
To keep respiratory artifacts to a minimum, respiratory triggering is
primarily used in abdominal imaging. Data acquisition for respiratory
triggering begins when the respiratory signal reaches a predefined
level (approx. 20 % of the maximum value). Respiratory movement is
minimal in this range.
(1) Expiration
(2) Inspiration
The respiratory signal is acquired using a respiratory cushion
connected via a pressure hose to the ECG and respiratory sensor
(PERU). The respiratory cushion is attached to the patient via the
respiratory belt.
Retrospective gating cannot be applied.
Performing
1 Ask the patient to lie still during the measurement.
2 Inform the patient that the knocking sounds during the
measurement are caused by switching the gradients on and off.
The PERU may also vibrate slightly.
✓
The plug of the respiration cushion is NOT connected.
CAUTION
Incorrect MR image due to disconnected respiratory cushion!
Incorrect diagnosis
◆ As a last step, plug the connector of the respiratory cushion
into the allocated jack.
1 Determine whether the patient is a thoracic or abdominal breather.
4.5
4.5.1
4.5.2
Informing the patient
Attaching the respiratory
cushion and belt
4 Physiological imaging
96
MR System | Operator Manual
Print No. M6-04401.621.02.02.02
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