Volume 13, Issue 1 pp. 142-151
Technical Note

Radial keyhole sequences for low field projection reconstruction interventional MRI

Ajit Shankaranarayanan BTech

Ajit Shankaranarayanan BTech

Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

Department of Biomedical Engineering, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

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Michael Wendt PhD

Michael Wendt PhD

Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

Department of Biomedical Engineering, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

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Andrik J. Aschoff MD

Andrik J. Aschoff MD

Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

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Jonathan S. Lewin MD

Jonathan S. Lewin MD

Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

Department of Oncology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

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Jeffrey L. Duerk PhD

Corresponding Author

Jeffrey L. Duerk PhD

Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

Department of Biomedical Engineering, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio 44106

Department of Radiology—MRI, University Hospitals of Cleveland, 11100 Euclid Avenue, Cleveland, OH 44106Search for more papers by this author

Abstract

Interventional magnetic resonance imaging (IMRI) is a rapidly emerging application for MRI in which diagnostic and therapeutic procedures are performed with MR image guidance. Real-time or near-real-time image acquisition and relative insensitivity to motion are essential for most intraoperative, therapeutic, and diagnostic procedures performed under MR guidance. The purpose of this work was to demonstrate the development and utility of two alternative rapid acquisition strategies during IMRI that are analogous to computed tomography fluoroscopy or keyhole MRI in a radial rather than rectilinear coordinate frame. The two strategies discussed here, interleaved projection reconstruction and continuous projection reconstruction, are compared and the feasibility of their application in experimental interventional applications is studied. J. Magn. Reson. Imaging 2001;13:142–151. © 2001 Wiley-Liss, Inc.

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