4D Ultrasound Tracking of Liver and its Verification for TIPS Guidance

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4D Ultrasound Tracking of Liver and its Verification for TIPS Guidance

4D Ultrasound Tracking of Liver and its Verification for TIPS Guidance

Abstract of 4D Ultrasound Tracking of Liver and its Verification 

work we describe a 4D registration method for on the fly stabilization of ultrasound volumes 
for improving image guidance for transjugular intrahepatic portosystemic shunt (TIPS) interventions.
 
The purpose of the method is to enable a continuous visualization of the relevant anatomical planes (determined in a planning stage) in a free breathing patient during the intervention.This requires registration of the planning information to the interventional images, which is achieved in two steps.
 
The two step approach helps in reducing the search range and is robust under rotation.
 
We additionally present an approach to initialize and verify the registration.Verification is required when the reference image (containing planning information) is acquired in the past and is not part of the (interventional) 4D ultrasound sequence.

 Conclusion

4D Ultrasound Tracking of Liver and its Verification for TIPS Guidance,We presented a 4D US tracking approach (RTRT) and techniques to verify and initialize registration. These techniques enable 4D US image guidance in minimally invasive interventions such as TIPS. It allows fixating the transducer and selecting the visualization planes afterwards, independent of the probe orientation.