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Peak-combination HARP: A method to correct for phase errors in HARP by Salome Ryf; Jeffrey Tsao; Juerg Schwitter; Anja Stuessi; Peter Boesiger is a Medicine article available to read on EtoBox.

What is Peak-combination HARP: A method to correct for phase errors in HARP about?

## Abstract ## Purpose To introduce a method to correct phase errors (e.g., from B~0~ inhomogeneity) in tagging images, which may affect harmonic phase (HARP) evaluation. ## Materials and Methods The phase images corresponding to the negative and positive harmonic peaks in __k__‐space are combined before HARP evaluation to eliminate any spurious phase. To validate in vivo, two complementary spatial modulation of magnetization (CSPAMM) data sets were collected for each volunteer and evaluated with conventional HARP, using either the positive or the negative harmonic peak, and with peak‐combination HARP. ## Results Elimination of phase distortion by peak combination was observed in vitro and in vivo. Improved reproducibility of motion parameters was found with peak‐combination HARP. ## Conclusion With peak‐combination HARP, reproducibility of contractile parameters is improved, and consequently, the number of subjects needed to detect statistically significant changes in contractile function can be reduced to one third compared to conventional HARP evaluation. J. Magn. Reson. Imaging 2004;20:874–880. © 2004 Wiley‐Liss, Inc.

Who reads Peak-combination HARP: A method to correct for phase errors in HARP?

Author

Salome Ryf; Jeffrey Tsao; Juerg Schwitter; Anja Stuessi; Peter Boesiger

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1053-1807)

Published

2004

Language

EN

Field

Medicine (Health Sciences)