Water/Fat Separation of Short T2* Tissue using Multi-echo Ultra-short Echo Time (UTE) Imaging and IDEAL
نویسندگان
چکیده
K. Wang, H. Yu, J. Brittain, S. Reeder, and J. Du Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, Applied Science Laboratory, GE Healthcare, Menlo Park, CA, United States, Applied Science Laboratory, GE Healthcare, Madison, WI, United States, Radiology, University of Wisconsin-Madison, Madison, WI, United States, Radiology, University of California, San Diego, San Diego, CA, United States
منابع مشابه
Merging UTE Imaging , Water - Fat Separation , and T 2 * Mapping in a Single 3 D MSK Scan
Introduction The separation of water and fat signal contributions, e.g. be achieved by chemical shift encoding [1], is essential for a number of MSK applications to improve image contrast for clinical diagnosis. Also, ultrashort echo time (UTE) imaging [2,3] was proposed for MSK MRI, yielding extra information about short T2 species. It is the idea to incorporate both approaches into a multi-ec...
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(top to bottom) 3-, 4and 5-echo bipolar acquisitions with an optimum marked; high NSA aids estimation; dot-dash line is an example hardware speed constraint (depends upon FOV and resolution); dash line is an example scan time constraint; maps computed with independent Δ3,4 show similar results Fig. 2: Strategies to acquire multiecho UTE images in 1 TR; echo spacings (Δ1, etc.) affect estimates ...
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INTRODUCTION Imaging of short T2 tissues often requires not only a short TE so that signal from very short T2 species can be detected, but efficient suppression of the signal from surrounding long T2 species which may have much higher MR signals (1-4). There are three major long T2 suppression techniques: 1) A long 90° pulse followed by gradient spoiling to selectively saturate long T2 species ...
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Ultrashort echo time (UTE) imaging has shown promise as a technique for imaging tissues with T2 values of a few milliseconds or less. These tissues, such as tendons, menisci, and cortical bone, are normally invisible in conventional magnetic resonance imaging techniques but have signal in UTE imaging. They are difficult to visualize because they are often obscured by tissues with longer T2 valu...
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تاریخ انتشار 2009