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Three-dimensional cardiac magnetic resonance imaging
L L Creswell1, M K Pasque, M W Vannier
1Department of Surgery, Washington University School of Medicine, St Louis, MO 63110.
Insights
Magnetic resonance (MR) imaging offers advanced techniques for evaluating the heart's complex 3-D structure and 4-D function. These methods enhance cardiac diagnosis beyond traditional angiography.
Area of Science:
- Cardiovascular Imaging
- Medical Physics
- Biomedical Engineering
Background:
- Cardiac imaging faces challenges due to the heart's 3D anatomy and 4D dynamics.
- Contrast angiography historically dominated cardiac diagnosis due to high resolution.
- Magnetic Resonance (MR) imaging is emerging as a powerful alternative.
Purpose of the Study:
- To review advancements in MR imaging for cardiac structure and function evaluation.
- To highlight the transition from 2D planar imaging to 3D and 4D reconstructions.
- To discuss the clinical and experimental applications of advanced cardiac MR.
Main Methods:
- Utilizing various MR imaging techniques (spin-echo, gradient-echo, echo-planar imaging).
- Employing planar 2D MR imaging for detailed cardiac assessments.
- Developing 3D reconstructions from stacked 2D images and advanced postprocessing techniques.
Main Results:
- MR imaging provides diverse techniques for characterizing cardiac anatomy and function.
- 2D MR imaging aids in diagnosing valvular, ischemic, and congenital heart diseases.
- 3D and 4D reconstructions offer comprehensive visualization of cardiac dynamics.
Conclusions:
- MR imaging is increasingly vital for detailed cardiac evaluation.
- Advanced visualization techniques enable a deeper understanding of 3D and 4D cardiac function.
- MR imaging shows significant potential in clinical and research settings for various heart conditions.
Abstract:
Evaluation of time-varying cardiac structure and function is challenging because of the three-dimensional (3-D) anatomy and time-varying (4-D) behavior of the heart. Historically, contrast angiography has served as the cornerstone of cardiac diagnosis because of its excellent spatial and temporal resolution. However, magnetic resonance (MR) imaging is now increasingly applied because of the wide variety of available MR imaging and data acquisition techniques, including spin-echo, gradient-echo, wall motion techniques, 1H 31P spectroscopy, and, most recently, echo-planar imaging. Planar 2-D MR imaging is used to characterize many aspects of cardiac structure and function, including anatomic relationships, valvular heart disease, ischemic heart disease, and congenital abnormalities, among others. The development of imaging display and data postprocessing analysis techniques have paralleled the growth of these image and data acquisition schemes and, increasingly, an emphasis has been placed on defining structure and function in 3-D, or even 4-D. Three-dimensional reconstructions of the heart have commonly relied on conventional planar MR image acquisition techniques; a 3-D volume of data is then created from stacked 2-D images. Surface reconstruction and graphical rendering techniques are used to generate representations of the heart that depict 3-D and 4-D cardiac structure and function. These techniques have been used both clinically and experimentally in a variety of settings, including ischemic heart disease, MR coronary angiography, and congenital heart disease.