Respiratory self-gating for free-breathing magnetization transfer MRI of the abdomen
نویسندگان
چکیده
منابع مشابه
Preliminary investigation of respiratory self-gating for free-breathing segmented cine MRI.
Segmented cine MRI generally requires breath-holding, which can be problematic for many patients. Navigator echo techniques, particularly successful for free-breathing coronary MRA, are incompatible with the acquisition strategies and SSFP pulse sequences commonly used for cine MRI. The purpose of this work is to introduce a new self-gating technique deriving respiratory gating information dire...
متن کاملThe accuracy and effectiveness of self-gating signals in free-breathing 3D cardiac cine MRI
Background Conventional cardiac cine magnetic resonance imaging (MRI) is typically based on the segmented data acquired by breath-hold 2D balanced steady-state free procession (SSFP) pulse sequence [1]. However, the slice misregistration caused by the variation of breath holding positions could compromise the effectiveness of 2D SSFP, and breath-hold makes it difficult for pediatric patients or...
متن کامل3D free-breathing cardiac cine imaging with respiratory and cardiac self-gating and 3D motion correction
INTRODUCTION Free-breathing cardiac cine imaging with respiratory and cardiac self-gating provides flexibility and convenience for patient scans. Here we propose a 3D radial cardiac cine imaging technique that improves upon self-gating by adding 3D respiratory motion correction. The 3D respiratory motion signals are derived from multiple projections through the data used for image reconstructio...
متن کاملFree-breathing phase contrast MRI with near 100% respiratory navigator efficiency using k-space-dependent respiratory gating.
PURPOSE To investigate the efficacy of a novel respiratory motion scheme, where only the center of k-space is gated using respiratory navigators, versus a fully respiratory-gated acquisition for three-dimensional flow imaging. METHODS Three-dimensional flow images were acquired axially using a gradient echo sequence in a volume, covering the ascending and descending aorta, and the pulmonary a...
متن کاملAssessment of Motion patterns in free breathing MRI of the abdomen using continuously tagged imaging
Introduction The entire abdomen is subject to complex motion patterns [1,2], comprising of breathing, heart and peristaltic motion. Insight into the contribution of each source is important to motility research and motion correction. This study proposes the use of continuously tagged imaging for motion assessment during free breathing, non-triggered, non-gated, dynamic MRI of the entire abdomen...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2014
ISSN: 0740-3194
DOI: 10.1002/mrm.25341