Abstract
Improved respiratory motion self-gating in cardiovascular MRI
Highlights
Respiratory motion compensation is often required in cardiovascular MRI applications especially when the scan time is not suitable for breath-hold
Improved respiratory motion self-gating in cardiovascular MRI
We propose a template cross-correlation (TCC) algorithm that provide accurate motion estimation with little cardiac motion modulation and evaluate it, along with other algorithms, using ventilator air-way pressure signal as gold standard in pediatric patients who underwent cardiac MRI exams under general anesthesia and mechanical ventilation
Summary
Respiratory motion compensation is often required in cardiovascular MRI applications especially when the scan time is not suitable for breath-hold. Respiratory self-gating (RSG) is a technique that estimate the respiratory motion based on k-space signal from the imaging object and is especially advantageous in CINE-like applications where conventional diaphragm navigator frequently interrupted the image acquisition. The estimated motion in these approaches is often modulated by cardiac motion. A quantitative evaluation on the accuracy of the estimated motion is missing due to the lack of gold-standard. We propose a template cross-correlation (TCC) algorithm that provide accurate motion estimation with little cardiac motion modulation and evaluate it, along with other algorithms, using ventilator air-way pressure signal as gold standard in pediatric patients who underwent cardiac MRI exams under general anesthesia and mechanical ventilation
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