• Radiology · Feb 2011

    Comparative Study

    T1-weighted fat-suppressed imaging of the pelvis with a dual-echo Dixon technique: initial clinical experience.

    • Peter Beddy, R Deepa Rangarajan, Masako Kataoka, Penelope Moyle, Martin J Graves, and Evis Sala.
    • Department of Radiology, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, England CB2 0QQ. pbeddy@eircom.net
    • Radiology. 2011 Feb 1; 258 (2): 583-9.

    PurposeTo compare the image quality of water-only images generated from a dual-echo Dixon technique with that of standard fast spin-echo T1-weighted chemical shift fat-suppressed images obtained in patients evaluated for pelvic pain with a 1.5-T magnetic resonance (MR) system.Materials And MethodsThe ethics board granted approval for this retrospective study; patient consent was not required. Twenty-five women underwent both standard axial T1-weighted fast spin-echo chemical shift fat-suppressed imaging and dual-echo Dixon imaging of the pelvis. Two readers independently scored the acquisitions for image quality, fat suppression quality, and artifact. On the basis of signal intensity measurements, the uniformity of fat suppression, the contrast between fat-suppressed and non-fat-suppressed tissue, and the contrast between pathologic lesions and suppressed fat were calculated. Values obtained with the T1-weighted fat-suppressed and dual-echo Dixon techniques were compared by using the Wilcoxon signed rank test.ResultsThe images generated with the dual-echo Dixon technique were of higher quality, had better fat suppression, and had less artifact (qualitative scores: 4.4, 4.6, and 4.0, respectively) compared with the standard T1-weighted fat-suppressed images (qualitative scores: 3.4, 3.3, and 3.6, respectively; P < .01). Contrast between fat-suppressed and non-fat-suppressed tissue (contrast ratio: 0.86 for dual-echo Dixon technique vs 0.42 for T1-weighted fat-suppressed technique, P < .001) and between pathologic lesions and suppressed fat (contrast ratio: 0.88 for dual-echo Dixon technique vs 0.57 for T1-weighted fat-suppressed technique, P =.012) was significantly improved with the dual-echo Dixon technique. Twelve pathologic lesions were identified with dual-echo Dixon imaging versus eight that were identified with T1-weighted fat-suppressed imaging.ConclusionCompared with standard T1-weighted fat-suppressed imaging, dual-echo Dixon imaging facilitates improved image quality of fat-suppressed images of the pelvis, enabling better delineation of pathologic lesions.© RSNA, 2010.

      Pubmed     Full text   Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…

What will the 'Medical Journal of You' look like?

Start your free 21 day trial now.

We guarantee your privacy. Your email address will not be shared.