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4D flow MRI.
Markl M, Frydrychowicz A, Kozerke S, Hope M, Wieben O. Markl M, et al. Among authors: frydrychowicz a. J Magn Reson Imaging. 2012 Nov;36(5):1015-36. doi: 10.1002/jmri.23632. J Magn Reson Imaging. 2012. PMID: 23090914 Review.
Time-resolved 3-dimensional magnetic resonance phase contrast imaging (4D Flow MRI) analysis of hemodynamics in valve-sparing aortic root repair with an anatomically shaped sinus prosthesis.
Oechtering TH, Hons CF, Sieren M, Hunold P, Hennemuth A, Huellebrand M, Drexl J, Scharfschwerdt M, Richardt D, Sievers HH, Barkhausen J, Frydrychowicz A. Oechtering TH, et al. Among authors: frydrychowicz a. J Thorac Cardiovasc Surg. 2016 Aug;152(2):418-427.e1. doi: 10.1016/j.jtcvs.2016.04.029. Epub 2016 Apr 16. J Thorac Cardiovasc Surg. 2016. PMID: 27423836
Sinus vortices visualized by streamlines and time-resolved particle paths were graded on a 4-point Likert scale. Time resolved pressure differences of the left ventricular outflow tract and the ascending aorta to a reference point in the aortic bulb as well as the t …
Sinus vortices visualized by streamlines and time-resolved particle paths were graded on a 4-point Likert scale. Time resolved pressu …
Proposing a novel technique to exclude the left ventricle with an assist device: insights from 4-dimensional flow magnetic resonance imaging.
Klotz S, Meyer-Saraei R, Frydrychowicz A, Scharfschwerdt M, Putman LM, Halder S, Sievers HH. Klotz S, et al. Among authors: frydrychowicz a. Eur J Cardiothorac Surg. 2016 Sep;50(3):439-45. doi: 10.1093/ejcts/ezw092. Epub 2016 Apr 22. Eur J Cardiothorac Surg. 2016. PMID: 27107046
We present initial insights into in vitro 4D flow magnetic resonance imaging (MRI)-based analysis of flow patterns and an enzyme-activated milk test in a porcine left ventricular (LV) model during LVAD support, in a standard implant technique and in combination with …
We present initial insights into in vitro 4D flow magnetic resonance imaging (MRI)-based analysis of flow patterns and an enzyme-activated m …
Time-resolved 3-dimensional magnetic resonance phase contrast imaging (4D Flow MRI) reveals altered blood flow patterns in the ascending aorta of patients with valve-sparing aortic root replacement.
Oechtering TH, Sieren MM, Hunold P, Hennemuth A, Huellebrand M, Scharfschwerdt M, Richardt D, Sievers HH, Barkhausen J, Frydrychowicz A. Oechtering TH, et al. Among authors: frydrychowicz a. J Thorac Cardiovasc Surg. 2020 Mar;159(3):798-810.e1. doi: 10.1016/j.jtcvs.2019.02.127. Epub 2019 Apr 5. J Thorac Cardiovasc Surg. 2020. PMID: 31078313
Plaques in the descending aorta: a new risk factor for stroke? Visualization of potential embolization pathways by 4D MRI.
Harloff A, Strecker C, Frydrychowicz AP, Dudler P, Hetzel A, Geibel A, Kollum M, Weiller C, Hennig J, Markl M. Harloff A, et al. Among authors: frydrychowicz ap. J Magn Reson Imaging. 2007 Dec;26(6):1651-5. doi: 10.1002/jmri.21126. J Magn Reson Imaging. 2007. PMID: 18022846
Comparison of radial 4D Flow-MRI with perivascular ultrasound to quantify blood flow in the abdomen and introduction of a porcine model of pre-hepatic portal hypertension.
Frydrychowicz A, Roldan-Alzate A, Winslow E, Consigny D, Campo CA, Motosugi U, Johnson KM, Wieben O, Reeder SB. Frydrychowicz A, et al. Eur Radiol. 2017 Dec;27(12):5316-5324. doi: 10.1007/s00330-017-4862-4. Epub 2017 Jun 27. Eur Radiol. 2017. PMID: 28656461 Free PMC article.
OBJECTIVES: Objectives of this study were to compare radial time-resolved phase contrast magnetic resonance imaging (4D Flow-MRI) with perivascular ultrasound (pvUS) and to explore a porcine model of acute pre-hepatic portal hypertension (PHTN). ...A model of pre-he …
OBJECTIVES: Objectives of this study were to compare radial time-resolved phase contrast magnetic resonance imaging (4D Flow-MRI) with periv …
Four-dimensional velocity mapping of the hepatic and splanchnic vasculature with radial sampling at 3 tesla: a feasibility study in portal hypertension.
Frydrychowicz A, Landgraf BR, Niespodzany E, Verma RW, Roldán-Alzate A, Johnson KM, Wieben O, Reeder SB. Frydrychowicz A, et al. J Magn Reson Imaging. 2011 Sep;34(3):577-84. doi: 10.1002/jmri.22712. Epub 2011 Jul 12. J Magn Reson Imaging. 2011. PMID: 21751287 Free PMC article.
MATERIALS AND METHODS: Twenty-four cirrhotic patients (55.9 ± 10.4 years) were scanned using 5-point PC-VIPR for high spatial resolution imaging with large volume coverage at 3 Tesla (T) using a 32-channel body coil. ...
MATERIALS AND METHODS: Twenty-four cirrhotic patients (55.9 ± 10.4 years) were scanned using 5-point PC-VIPR for high spatial resolution ima …
[MR-based tridirectional flow imaging. Acquisition and 3D analysis of flows in the thoracic aorta].
Unterhinninghofen R, Ley S, Frydrychowicz A, Markl M. Unterhinninghofen R, et al. Among authors: frydrychowicz a. Radiologe. 2007 Nov;47(11):1012-20. doi: 10.1007/s00117-007-1577-6. Radiologe. 2007. PMID: 17932640 Review. German.
Tridirectional MR flow imaging is a novel method that extends the well-established technique of phase-contrast flow measurement by vectorial velocity encoding, i.e., by encoding in all three spatial directions. ...
Tridirectional MR flow imaging is a novel method that extends the well-established technique of phase-contrast flow measurement by ve …
In vivo assessment and visualization of intracranial arterial hemodynamics with flow-sensitized 4D MR imaging at 3T.
Wetzel S, Meckel S, Frydrychowicz A, Bonati L, Radue EW, Scheffler K, Hennig J, Markl M. Wetzel S, et al. Among authors: frydrychowicz a. AJNR Am J Neuroradiol. 2007 Mar;28(3):433-8. AJNR Am J Neuroradiol. 2007. PMID: 17353308 Clinical Trial.
In large arteries of healthy volunteers, the temporal and spatial evolution of blood flow was successfully visualized and revealed--for example, a helical flow pattern in the carotid siphon. In a patient with steno-occlusive neurovascular disease, stagnant and retro …
In large arteries of healthy volunteers, the temporal and spatial evolution of blood flow was successfully visualized and revealed--for exam …
[Flow-sensitive in-vivo 4D MR imaging at 3T for the analysis of aortic hemodynamics and derived vessel wall parameters].
Frydrychowicz A, Markl M, Harloff A, Stalder AF, Bock J, Bley TA, Berger A, Russe MF, Schlensak C, Hennig J, Langer M. Frydrychowicz A, et al. Rofo. 2007 May;179(5):463-72. doi: 10.1055/s-2007-962941. Rofo. 2007. PMID: 17436180 German.
By presenting the pre- and postoperative assessment of hemodynamics in a thoracic aortic aneurysm and the detailed analysis of blood flow in a patient with coarctation we underline the potential of time-resolved 3D phase contrast MR at 3T for hemodynamic assessment …
By presenting the pre- and postoperative assessment of hemodynamics in a thoracic aortic aneurysm and the detailed analysis of blood …
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