Abstract #0447

Dwell Time Compensation of the Gradient System Transfer Function (GSTF): Field Camera versus Phantom-based Measurement

Manuel Stich^1,2, Julian J. A. Richter¹, Tobias Wech¹, Thorsten A. Bley¹, Herbert Köstler¹, and Adrienne E. Campbell-Washburn²

¹Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany, ²Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States

As a linear and time-invariant (LTI) system, the dynamic gradient system can be described by the gradient system transfer function (GSTF). GSTF can be determined by special measurement equipment such as field cameras. Alternatively, phantom-based approaches were introduced as for GSTF determination without additional hardware needed. This study compares the field camera-based measurement to the phantom-based measurement and introduces a dwell time compensation. The GSTFs are applied for trajectory correction using a 3D wave-CAIPI imaging sequence.

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