The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Volker Rasche - One of the best experts on this subject based on the ideXlab platform.
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SAR reduced black-blood cine TPM for increased Temporal Resolution at 3T
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, G Ulrich Nienhaus, Patrick Etyngier, Volker RascheAbstract:Object: The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases. Materials and methods: Thirteen volunteers were enrolled in this study. Each volunteer underwent different myocardial short-axis scans comprising scans with application of both presaturation pulses, with alternating application of presaturation pulses and with an attenuation of the excitation angle. The last two approaches enable a SAR reduction or increased Temporal Resolution. The contrast to noise ratio (CNR) between myocardium and blood and the influence on the measured tissue motion were investigated. Results: High CNR between myocardium and blood could be obtained with the application of alternating presaturation-pulses. Reduction of the flip angle of the presaturation-pulses provided reduced CNR relative to both the original and the alternated presaturation-pulses approach. More details of the myocardial motion were observed with increased Temporal Resolution. Conclusion: It is feasible to increase the Temporal Resolution at high field strength by reducing the SAR with either alternating presaturation-pulses or decreased flip angle of these pulses. (c) Springer Verlag. The original version of this work is available at http://www.springerlink.com/content/718n237732570571
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sar reduced black blood cine tpm for increased Temporal Resolution at 3t
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, Patrick Etyngier, Ulrich G Nienhaus, Volker RascheAbstract:Object The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases.
Robert Manzke - One of the best experts on this subject based on the ideXlab platform.
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SAR reduced black-blood cine TPM for increased Temporal Resolution at 3T
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, G Ulrich Nienhaus, Patrick Etyngier, Volker RascheAbstract:Object: The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases. Materials and methods: Thirteen volunteers were enrolled in this study. Each volunteer underwent different myocardial short-axis scans comprising scans with application of both presaturation pulses, with alternating application of presaturation pulses and with an attenuation of the excitation angle. The last two approaches enable a SAR reduction or increased Temporal Resolution. The contrast to noise ratio (CNR) between myocardium and blood and the influence on the measured tissue motion were investigated. Results: High CNR between myocardium and blood could be obtained with the application of alternating presaturation-pulses. Reduction of the flip angle of the presaturation-pulses provided reduced CNR relative to both the original and the alternated presaturation-pulses approach. More details of the myocardial motion were observed with increased Temporal Resolution. Conclusion: It is feasible to increase the Temporal Resolution at high field strength by reducing the SAR with either alternating presaturation-pulses or decreased flip angle of these pulses. (c) Springer Verlag. The original version of this work is available at http://www.springerlink.com/content/718n237732570571
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sar reduced black blood cine tpm for increased Temporal Resolution at 3t
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, Patrick Etyngier, Ulrich G Nienhaus, Volker RascheAbstract:Object The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases.
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adaptive Temporal Resolution optimization in helical cardiac cone beam ct reconstruction
Medical Physics, 2003Co-Authors: Robert Manzke, Michael Grass, Tim Nielsen, Gilad Shechter, David J HawkesAbstract:Cone beam computed tomography scanners in combination with heart rate adaptive reconstruction schemes have the potential to enable cardiac volumetric computed tomography (CT) imaging for a larger number of patients and applications. In this publication, an adaptive scheme for the automatic and patient-specific reconstruction optimization is introduced to improve the Temporal Resolution and image quality. The optimization method permits the automatic determination of the required amount of gated helical cone beam projection data for the reconstruction volume. It furthermore allows one to optimize subvolume reconstruction yielding an increased Temporal Resolution. In addition, methods for the assessment of the Temporal Resolution are given which enable a quantitative documentation of the reconstruction improvements. Results are presented for patient data sets acquired in low pitch helical mode using a 16-slice cone beam CT system with parallel ECG recording.
Anja Lutz - One of the best experts on this subject based on the ideXlab platform.
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SAR reduced black-blood cine TPM for increased Temporal Resolution at 3T
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, G Ulrich Nienhaus, Patrick Etyngier, Volker RascheAbstract:Object: The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases. Materials and methods: Thirteen volunteers were enrolled in this study. Each volunteer underwent different myocardial short-axis scans comprising scans with application of both presaturation pulses, with alternating application of presaturation pulses and with an attenuation of the excitation angle. The last two approaches enable a SAR reduction or increased Temporal Resolution. The contrast to noise ratio (CNR) between myocardium and blood and the influence on the measured tissue motion were investigated. Results: High CNR between myocardium and blood could be obtained with the application of alternating presaturation-pulses. Reduction of the flip angle of the presaturation-pulses provided reduced CNR relative to both the original and the alternated presaturation-pulses approach. More details of the myocardial motion were observed with increased Temporal Resolution. Conclusion: It is feasible to increase the Temporal Resolution at high field strength by reducing the SAR with either alternating presaturation-pulses or decreased flip angle of these pulses. (c) Springer Verlag. The original version of this work is available at http://www.springerlink.com/content/718n237732570571
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sar reduced black blood cine tpm for increased Temporal Resolution at 3t
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, Patrick Etyngier, Ulrich G Nienhaus, Volker RascheAbstract:Object The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases.
Patrick Etyngier - One of the best experts on this subject based on the ideXlab platform.
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SAR reduced black-blood cine TPM for increased Temporal Resolution at 3T
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, G Ulrich Nienhaus, Patrick Etyngier, Volker RascheAbstract:Object: The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases. Materials and methods: Thirteen volunteers were enrolled in this study. Each volunteer underwent different myocardial short-axis scans comprising scans with application of both presaturation pulses, with alternating application of presaturation pulses and with an attenuation of the excitation angle. The last two approaches enable a SAR reduction or increased Temporal Resolution. The contrast to noise ratio (CNR) between myocardium and blood and the influence on the measured tissue motion were investigated. Results: High CNR between myocardium and blood could be obtained with the application of alternating presaturation-pulses. Reduction of the flip angle of the presaturation-pulses provided reduced CNR relative to both the original and the alternated presaturation-pulses approach. More details of the myocardial motion were observed with increased Temporal Resolution. Conclusion: It is feasible to increase the Temporal Resolution at high field strength by reducing the SAR with either alternating presaturation-pulses or decreased flip angle of these pulses. (c) Springer Verlag. The original version of this work is available at http://www.springerlink.com/content/718n237732570571
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sar reduced black blood cine tpm for increased Temporal Resolution at 3t
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, Patrick Etyngier, Ulrich G Nienhaus, Volker RascheAbstract:Object The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases.
Axel Bornstedt - One of the best experts on this subject based on the ideXlab platform.
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SAR reduced black-blood cine TPM for increased Temporal Resolution at 3T
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, G Ulrich Nienhaus, Patrick Etyngier, Volker RascheAbstract:Object: The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases. Materials and methods: Thirteen volunteers were enrolled in this study. Each volunteer underwent different myocardial short-axis scans comprising scans with application of both presaturation pulses, with alternating application of presaturation pulses and with an attenuation of the excitation angle. The last two approaches enable a SAR reduction or increased Temporal Resolution. The contrast to noise ratio (CNR) between myocardium and blood and the influence on the measured tissue motion were investigated. Results: High CNR between myocardium and blood could be obtained with the application of alternating presaturation-pulses. Reduction of the flip angle of the presaturation-pulses provided reduced CNR relative to both the original and the alternated presaturation-pulses approach. More details of the myocardial motion were observed with increased Temporal Resolution. Conclusion: It is feasible to increase the Temporal Resolution at high field strength by reducing the SAR with either alternating presaturation-pulses or decreased flip angle of these pulses. (c) Springer Verlag. The original version of this work is available at http://www.springerlink.com/content/718n237732570571
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sar reduced black blood cine tpm for increased Temporal Resolution at 3t
Magnetic Resonance Materials in Physics Biology and Medicine, 2011Co-Authors: Anja Lutz, Axel Bornstedt, Robert Manzke, Patrick Etyngier, Ulrich G Nienhaus, Volker RascheAbstract:Object The objective was to improve the Temporal Resolution in black-blood CINE tissue phase mapping sequences at high field MR systems. The Temporal Resolution is limited due to SAR constraints causing idle times into the sequence. The aim was to avoid these idle times and therefore providing an increased number of heart phases.
