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  Respiratory motion prediction and prospective correction for free-breathing arterial spin-labeled perfusion MRI of the kidneys

Song, H., Ruan, D., Liu, W., Stenger, V., Pohmann, R., Fernández-Seara, M., et al. (2017). Respiratory motion prediction and prospective correction for free-breathing arterial spin-labeled perfusion MRI of the kidneys. Medical Physics, 44(3), 962-973. doi:10.1002/mp.12099.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C331-C Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F9CC-2
Genre: Journal Article

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Song, H, Author
Ruan, D, Author
Liu, W, Author
Stenger, VA, Author
Pohmann, R1, 2, Author              
Fernández-Seara, MA, Author
Nair, T, Author
Jung, S, Author
Luo, J, Author
Motai, Y, Author
Ma, J, Author
Hazle, JD, Author
Gach, HM, Author
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Purpose Respiratory motion prediction using an artificial neural network (ANN) was integrated with pseudocontinuous arterial spin labeling (pCASL) MRI to allow free-breathing perfusion measurements in the kidney. In this study, we evaluated the performance of the ANN to accurately predict the location of the kidneys during image acquisition. Methods A pencil-beam navigator was integrated with a pCASL sequence to measure lung/diaphragm motion during ANN training and the pCASL transit delay. The ANN algorithm ran concurrently in the background to predict organ location during the 0.7-s 15-slice acquisition based on the navigator data. The predictions were supplied to the pulse sequence to prospectively adjust the axial slice acquisition to match the predicted organ location. Additional navigators were acquired immediately after the multislice acquisition to assess the performance and accuracy of the ANN. The technique was tested in eight healthy volunteers. Results The root-mean-square error (RMSE) and mean absolute error (MAE) for the eight volunteers were 1.91 ± 0.17 mm and 1.43 ± 0.17 mm, respectively, for the ANN. The RMSE increased with transit delay. The MAE typically increased from the first to last prediction in the image acquisition. The overshoot was 23.58 ± 3.05 using the target prediction accuracy of ± 1 mm. Conclusion Respiratory motion prediction with prospective motion correction was successfully demonstrated for free-breathing perfusion MRI of the kidney. The method serves as an alternative to multiple breathholds and requires minimal effort from the patient.

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 Dates: 2017-03
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/mp.12099
BibTex Citekey: SongRLSPFNJLMMHG2017_2
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Title: Medical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 44 (3) Sequence Number: - Start / End Page: 962 - 973 Identifier: -