Abstract #3594

Efficient respiratory navigator-based 4D MRI

Sascha Krueger¹ and Tim Nielsen¹

¹Philips GmbH, Innovative Technologies, Research Laboratories, Hamburg, Germany

4D image data are used in radiation therapy planning to estimate motion of the tumor or regions at risk. Today 4D CT is commonly used for this purpose. Due to better soft tissue contrast and quantitative and functional imaging, a clinical demand for MRI in therapy planning exists. Consequently, there is also a growing interest in 4D MRI techniques. A scan-time-efficient 4D MRI method utilizing the MRI Navigator as motion sensor with high geometric fidelity is proposed.

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