منابع مشابه
Reversed Spiral Imaging for Coronary MR Angiography
P. Börnert, B. Aldefeld, K. Nehrke, H. Eggers Philips Research Laboratories, Hamburg, Germany Synopsis Coronary MR angiography (CMRA) can benefit in the future from the principles of molecular imaging. Specific contrast agents will offer the opportunity to image arterial plaque directly, if appropriate image contrasts (T1 or T2*) can be introduced. Spiral imaging has been shown to be robust and...
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In this study a fully adiabatic volume selection sequence (LASER) with SPIRAL readout was developed to acquire high resolution (zoomed) T2 – weighted images with reduced acquisition time. Thus, high temporal resolution combined with high spatial resolution was achieved. When adiabatic full passage pulses were inserted prior to the LASER localization to generate Carr-Purcell pulse train (CP-LASE...
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OBJECTIVES Current clinical hyperpolarized He lung ventilation MR imaging protocols rely on the patient's ability to control inhalation and exhalation and hold their breath on demand. This is impractical for intensive care unit patients under ventilation or for pediatric populations under the age of 3 to 4 years. To address this problem, we propose a free-breathing protocol for hyperpolarized H...
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Introduction: Spiral data acquisition has gained in popularity over the past decade since it has several advantages over rectilinear acquisition methods. These advantages include short acquisition time and reduced sensitivity to flow artifacts. In spiral imaging, k-space data are efficiently collected along spiral trajectories during relatively long readout. Since the total number of TR cycles ...
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Background/introduction Real time MR thermometry, usually based on the protonresonance frequency shift, is a key aspect of MR-guided focused ultrasound procedures. The desire to monitor the entire sonicated volume has led the field towards the development of rapid, 3D methods; however, acquiring fully sampled 3D volumetric data to monitor heating is time consuming, and so fast methods must be d...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2000
ISSN: 0740-3194,1522-2594
DOI: 10.1002/1522-2594(200009)44:3<479::aid-mrm20>3.0.co;2-2