Meeting Banner
Abstract #0359

A Model-Based Reconstruction Technique for Parameter Mapping of Saturation Prepared Radially Acquired Data

MAGNA25Johannes Tran-Gia1, Daniel Stb1, Dietbert Hahn1, Herbert Kstler1

1Institute of Radiology, University of Wrzburg, Wrzburg, Germany

A model-based image reconstruction algorithm for parameter mapping of the apparent relaxation parameter T1eff after saturation preparation is presented. For radial trajectories, every acquired projection contains information about the image contrast. By incorporating a signal model into the image reconstruction, it is possible to use this information to resolve the signal evolution with a high temporal resolution, yielding the relaxation parameters T1eff. The functionality of the algorithm and the accuracy of the quantified parameters are demonstrated in phantom studies as well as in in-vivo measurements.

Keywords

accuracy acquisition additionally agent allows apparent applied array assess avoid basic blue body bottom calibrating capable carried certain channel characterizing coil coincide column comparable compartment compartments complete compromise concentrations conjunction consistency consistent consisting contains contrast contrasts dark decays depicted determined difficult employing ensure error errors estimation evaluated evaluation even every evolution example excellent excitation executed exemplary exponential fitting flash fully function golden grid gridded grog head impossible in vivo indicated indicates initially institute iteration iterations iterative knowledge like longitudinal magnetization mapping material measured model modeled mono necessity originally passed phantom pixel position preparation prepared presence prior process projection projections propose proposed pulse quality quantification radial radially radiology readout reception reconstructed reconstruction recovery required resolution resolve resolved resolving samples sampling saturation scanner scheme sector segmented self separate separately short snapshot space spaces spatial stages steady subsequently substituted suitable systematic table temporal termination thereby tissue trajectory transformed trio typically utilized utilizing vial vials whole yielding