Publications

2012

Vibration-Synchronized Magnetic Resonance Imaging for the Detection of Myocardial Elasticity Changes
Elgeti T, Tzschätzsch H, Hirsch S, Krefting D, Klatt D, Niendorf T, Braun J, Sack I
Magnetic Resonance in Medicine, 2012, DOI: 10.1002/mrm.24185

In Vivo Time Harmonic Elastography of the Human Heart
Tzschätzsch H, Elgeti T, Rettig K, Kargel C, Klaua R, Schultz M, Braun J, Sack I
Ultrasound in Medicine & Biology, 38,214-222, 2012

Brain Viscoelasticity Alteration in Chronic-Progressive Multiple Sclerosis
Streitberger K-J, Sack I, Krefting D, Pfuller C, Braun J, Friedemann P, Wuerfel J
PLosone, 7, 1, e29888, 2012

In Vivo Waveguide Elastography of White Matter Tracts in the Human Brain
Romano A, Scheel M, Hirsch S, Braun J, Sack I
Magnetic Resonance in Medicine -- doi:10.1002/mrm.24141

2011

Evaluation of tomosynthesis elastography in a breast-mimicking phantom
Engelken FJ, Sack I, Klatt D, Fischer T, Fallenberg EM, Bick U, Diekmann F
European Journal of Radiology  --  doi:10.1016/j.ejrad.2011.06.03

The Influence of Physiological Aging and Atrophy on Brain Viscoelastic Properties in Humans
Sack I, Streitberger K-J, Krefting D, Paul F, Braun J
PlosOne, 6, 9, e23451, 2011

Alteration of brain viscoelasticity after shunt treatment in normal pressure hydrocephalus
 Freimann FB, Streitberger KJ, Klatt D, Lin K, McLaughlin J, Braun J, Sprung C, Sack I
Neuroradiology -- doi:10.1007/s00234-011-0871-1

Measurement of the hyperelastic properties of ex vivo brain tissue slices
Kaster T, Sack I, Samani A
Journal of Biomechanics, 44, 1158-63, 2011

Wide-range dynamic magnetic resonance elastography
Riek K, Klatt D, Nuzha H, Mueller S, Neumann U, Sack I, Braun J
Journal of Biomechanics, 44, 1380-1386, 2011 

In vivo viscoelastic properties of the brain in normal pressure hydrocephalus
Streitberger K-J,Wiener E, Hoffmann J, Freimann FB, Klatt D, Braun J, Lin K, McLaughlin J, Sprung C, Klingebiel R, Sack I
NMR in Biomedicine, 24, 385-392, 2011

2010

Elasticity-based determination of isovolumetric phases in the human heart
Elgeti T, Beling M, Hamm B, Braun J, Sack I
Journal of Cardiovascular Magnetic Resonance, 12, 60, 2010

Viscoelasticity-based MR elastography of skeletal muscle
Klatt D., Papazoglou S., Braun J., Sack I.
Physics in Medicine and Biology, 55, 6445–6459, 2010

Viscoelasticity-based Staging of Hepatic Fibrosis with Multifrequency MR Elastography
Asbach P,Klatt D, Schlosser B, Biermer M, Muche M, Rieger A, Loddenkemper C, Somasundaram R, Berg T, Hamm B, Braun J, Sack I
Radiology, 257, 80-86, 2010

Cardiac Magnetic Resonance Elastography: Toward the Diagnosis of Abnormal Myocardial Relaxation
Elgeti T, Beling M, Hamm B, Braun J, Sack I
Investigative Radiology, 45, 782-787, 2010

In Vivo Magnetic Resonance Elastography of Human Brain at 7 T and 1.5 T
Hamhaber U., Klatt D., Papazoglou S., Hollmann M., Stadler J., Sack I., Bernarding J., Braun J.
Journal of Magnetic Resonance Imaging, 32, 577-583, 2010

Anderson localization of shear waves observed by magnetic resonance imaging
Papazoglou S., Klatt D., Braun J., Sack I.
EPL (European Physics Letters), 91, 17007, 2010

Viscoelastic properties of liver measured by oscillatory rheometry and multifrequency magnetic resonance elastography
Klatt D., Friedrich Chr., Korth Y., Vogt R., Braun J., Sack I.
Biorheology, 47, 133-141, 2010

MR-elastography reveals degradation of tissue integrity in multiple sclerosis
Wuerfel J., Paul F.,Beierbach B., Wuerfel J., Klatt D., Hamhaber U., Papazoglou S., Zipp F., Martus P., Braun J., Sack I.
Neuroimage, 49, 2520–2525, 2010

2009

Cardiac MR Elastography: Comparison with left ventricular pressure measurement
Elgeti T., Laule M., Kaufels N., Schnorr J., Hamm B., Samani A., Braun J., Sack I.
Journal of Cardiovascular Magnetic Resonance, 11, 44, 2009

The impact of aging and gender on brain viscoelasticity
Sack I., Beierbach B., Wuerfel J., Klatt D., Hamhaber U., Papazoglou S., Martus P., Braun J.
Neuroimage, 46, 652-657, 2009

Scatter-based magnetic resonance elastography
Papazoglou S., Xu C., Hamhaber U., Siebert E., Bohner G., Klingebiel R., Braun J., Sack I.
Physics in Medicine and Biology, 54, 2229-2241, 2009

MR Elastography of the Human Heart: Noninvasive Assessment of Myocardial Elasticity Changes by Shear Wave Amplitude Variations
Sack I., Rump J., Elgeti T., Samani A, Braun J
Magnetic Resonance in Medicine, 61, 668-677, 2009

2008

Cardiac Magnetic Resonance Elastography: Initial Results
Elgeti, T., Rump, J., Hamhaber, U., Papazoglou, S., Hamm, B., Braun, J., Sack, I.
Investigative Radiology, 43, 762-772, 2008

Assessment of the Solid-Liquid Behavior of the Liver for the Diagnosis of Diffuse Disease Using Magnetic Resonance Elastography
Klatt, D., Asbach, P., Somasundaram, R., Hamm, B., Braun, J., Sack, I.
Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren (RöFo) 11, 2008

Assessment of liver viscoelasticity using multifrequency MR elastography
Asbach, P., Klatt, D., Hamhaber, U., Braun, J., Somasundaram, R., Hamm, B., Sack, I.
Magnetic Resonance in Medicine, 60, 373-379, 2008

Algebraic Helmholtz inversion in planar magnetic resonance elastography
Papazoglou, S., Hamhaber, U., Braun, J., Sack, I.
Physics in Medicine and Biology, 53, 3147-3158, 2008

Phase preparation in steady-state free precession MR elastography
Rump, J., Warmuth, C., Braun, J., Sack, I.
Magnetic Resonance Imaging, 26, 228-235, 2008

Non-invasive measurement of brain viscoelasticity using magnetic resonance elastography
Sack, I., Beierbach, B., Hamhaber, U., Klatt, D., Braun, J.
NMR in Biomedicine, 21, 265-271, 2008

2007

Noninvasive assessment of the rheological behavior of human organs using multifrequency MR elastography: a study of brain and liver viscoelasticity
Klatt, D., Hamhaber, U., Asbach, P., Braun, J., Sack, I.
Physics in Medicine and Biology, 52, 7281-7294, 2007

Fractional encoding of harmonic motions in MR elastography
Rump, J., Klatt, D., Braun, J., Warmuth, C., Sack, I.
Magnetic Resonance in Medicine, 57, 388-395, 2007

Plane SH-wave scattering from a nonwelded interface observed by Magnetic Resonance Elastography
Papazoglou, S., Hamhaber, U., Braun, J., Sack, I.
Physics in Medicine and Biology, 52, 675-684, 2007

Three-dimensional analysis of shear wave propagation observed by in vivo magnetic resonance elastography of the brain
Hamhaber, U., Sack, I., Papazoglou, S., Rump, J., Klatt, D., Braun, J.
Acta Biomaterialia, 3(1), 127-137, 2007

2006

In Vivo Determination of Hepatic Stiffness Using Steady-State Free Precession Magnetic Resonance Elastography
Klatt, D., Asbach, P., Rump, J., Papazoglou, S., Somasundaram, R., Modrow, J., Braun, J., Sack, I.
Investigative Radiology, 41, 841-848, 2006

Shear wave group velocity inversion in MR elastography of human skeletal muscle
Papazoglou, S., Rump, J., Braun, J., Sack, I.
Magnetic Resonance in Medicine, 56, 489-497, 2006

Alterations of the proton-T2 Time in relaxed skeletal muscle induced by passive extremity flexions
Rump, J., Braun, J., Papazoglou, S., Taupitz, M., Sack, I.
Journal of Magnetic Resonance in Medicine, 23, 541-546, 2006

2005

Two-dimensional waveform analysis in MR elastography of skeletal muscles
Papazoglou, S., Braun, J., Hammhaber, U., Sack, I.
Physics in Medicine and Biology, 50, 1313-1325, 2005

2004

Prospective registration of human head magnetic resonance images for reproducible slice positioning using localizer images
Gedat, E, Braun, J., Sack, I., Bernarding, J.
Journal of Magnetic Resonance Imaging, 20, 581-587, 2004

Observation of non-linear shear wave propagation using Magnetic Resonance Elastography
Sack, I., Mcgowan, C.K., Samani, A., Luginbuhl C., Oakden W., Plewes D.B.,
Magnetic Resonance in Medicine, 52, 842-850, 2004

An Inductive Method to Measure Mechanical Excitation Spectra for MRI Elastography
Plewes, D.B., Luginhbuh, C., McGowan, C.K., Sack, I.,
Concepts in Magnetic Resonance - Part B, 21B, 32-39, 2004

Diffusion Weighted Imaging and Magnetic Resonance Elastography of the Sol/Gel Phase Transition in Agarose
Sack, I., Gedat, E., Buntkowsky, G., Bernarding, J., Braun, J.
Journal of Magnetic Resonance, 166, 252-261, 2004

2003

An Electromagnetic Actuator for Variable Directioning of Shear Wave Displacement in MR Elastography
Braun, J., Braun, K., Sack, I.
Magnetic Resonance in Medicine,50, 220–222, 2003

2002

Analysis of Wave Patterns in MR Elastography at Skeletal Muscle using Coupled Harmonic Oscillator Simulations
Sack, I., Bernarding, J., Braun, J.
Magnetic Resonance Imaging, 20, 95-104, 2002

2001

Bestimmung lokaler Frequenzen aus Magnetresonanzelastographie Bilddaten
Braun, J., Sack, I., Bernarding, J., Tolxdorff, T.
Informatik, Biometrie und Epidemiologie in Medizin und Biologie, 32, 348-357, 2001

Magnetic Resonance Elastography: A Method for the Noninvasive and Spatially Resolved Observation of Phase Transitions in Gels
Sack, I., Buntkowsky, G., Bernarding, J., Braun, J.
Journal of the American Chemical Society, 123, 11087-11088, 2001

Simulation and Analysis of Magnetic Resonance Elastography Wave Images using Coupled Harmonic Oscillators and Gaussian Local Frequency Estimation
Braun, J., Buntkowsky, G., Bernarding, J., Tolxdorff, T., Sack, I.
Magnetic Resonance Imaging, 19, 703-713, 2001

Peptide Torsion Angle Measurements: Effects of Nondilute Spin Pairs on Carbon-Observed, Deuterium-Dephased PM5-REDOR
Sack I., Balazs Y. S., Rahimipour S., Vega S.
Journal of Magnetic Resonance, 148, 104-114, 2001

2000

Solid-State NMR Study of the SH3 Domain of a–Spectrin – Application of 13C-15N TEDOR and REDOR
Macholl, S., Sack, I., Limbach, H.-H., Pauli, J., Kelly, M., Buntkowsky, G.
Magnetic Resonance in Chemistry, 38, 596-603, 2000

Solid-State NMR Determination of Peptide Torsion Angles: Applications of 2H-Dephased REDOR
Sack, I., Balazs, Y. S., Rahimipour, S., Vega, S.
Journal of the American Chemical Society, 122, 12263-12269, 2000

Efficient Carbon-Deuterium REDOR NMR Spectroscopy
Sack, I., Vega, S.
Journal of Magnetic Resonance, 145, 52-61, 2000

A 15N-1H Dipolar CSA Solid State NMR Study of Polyglycine (-CO-CD2-15NH-)n Modifications
Sack, I., Macholl, S., Wehrmann, F., Albrecht, J., Limbach, H.-H., Fillaux, F., Baron, M. H., Buntkowsky, G.
Applied Magnetic Resonance, 17, 413-431, 2000

Conformational Studies of Polymorphic N-Octyl-D-Gluconamide by 15N Labeled 13C Natural Abundance REDOR Spectroscopy
Sack, I., Macholl, S., Fuhrhop, J. H., Buntkowsky, G.
Physical Chemistry Chemical Physics, 2, 1781-1788, 2000

1999

Deuterium REDOR: Principles and Applications for Distance Measurements
Sack, I., Goldbourt, A., Vega, S., Buntkowsky, G.
Journal of Magnetic Resonance, 138, 54-65, 1999

Evidence by 15N CPMAS and 15N-13C REDOR NMR for Reversible Binding of Atmospheric CO2 to Amino Groups in the Solid State
Schimming, V., Hoelger, C., Buntkowsky, G., Sack, I., Fuhrhop, J. H., Rocchetti, S., Limbach, H.-H.
Journal of the American Chemical Society, 121, (20) 4892-4893, 1999

1997

Structure Elucidation of Amide Bonds with Dipolar Chemical Shift NMR Spectroscopy
Buntkowsky, G., Sack, I., Limbach, H.-H., Kling, B., Fuhrhop, J. H.
Journal of Physical Chemistry B, 101, 11265, 1997

2H NMR Theory of Transition Metal Dihydrides: Coherent and Incoherent Quantum Dynamics
Buntkowsky, G., Limbach, H.-H., Wehrmann, F., Sack, I., Vieth, H. M., Morris, R. H.
Journal of Physical Chemistry A, 101, 4679, 1997