Estimation of relative cardiovascular pressures using time-resolved three-dimensional phase contrast MRI

• Published in: Magnetic resonance in medicine Vol. 45; no. 5; pp. 872 - 879
• Main Authors: Ebbers, Tino, Wigström, Lars, Bolger, Ann F., Engvall, Jan, Karlsson, Matts
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 01.05.2001; Williams & Wilkins
• Subjects: Adult; Aorta - physiology; Biological and medical sciences; blood flow; Cardiomyopathy, Dilated - physiopathology; Cardiovascular system; heart; Heart - physiology; Humans; Imaging, Three-Dimensional; Investigative techniques, diagnostic techniques (general aspects); Magnetic Resonance Imaging - methods; Male; Medical sciences; MEDICIN; MEDICINE; Middle Aged; noninvasive; Phantoms, Imaging; Pressure; Radiodiagnosis. Nmr imagery. Nmr spectrometry; velocity; Human; Evaluation; 3D imaging; Nuclear magnetic resonance imaging; In vitro; Blood flow; In vivo; Sensitivity; Navier Stokes equation; Measurement technique; Non invasive method; Hemodynamics; Left ventricle performance; Computing method
• ISSN: 0740-3194; 1522-2594; 1522-2594
• DOI: 10.1002/mrm.1116

Accurate, easy‐to‐use, noninvasive cardiovascular pressure registration would be an important addition to the diagnostic armamentarium for assessment of cardiac function. A novel noninvasive and three‐dimensional (3D) technique for estimation of relative cardiovascular pressures is presented. The relative pressure is calculated using the Navier‐Stokes equations along user‐defined lines placed within a time‐resolved 3D phase contrast MRI dataset. The lines may be either straight or curved to follow an actual streamline. The technique is validated in an in vitro model and tested on in vivo cases of normal and abnormal transmitral pressure differences and intraaortic flow. The method supplements an intuitive visualization technique for cardiovascular flow, 3D particle trace visualization, with a quantifiable diagnostic parameter estimated from the same dataset. Magn Reson Med 45:872–879, 2001. © 2001 Wiley‐Liss, Inc.