First-pass contrast-enhanced renal MRA at 7 Tesla: initial results.
Objective: The aim of this study was to assess the feasibility of first-pass contrast-enhanced renal MR angiography (MRA) at 7 T.Methods: In vivo first-pass contrast-enhanced high-field examinations were obtained in eight healthy subjects on a 7-T whole-body MRI. A custom-built body transmit/receive...
| Publicado en: | European Radiology Vol. 23; no. 4; pp. 1059 - 1067 |
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| Autores principales: | , , , , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Apr2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104252342&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104252342 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Apr2013 vid: 23 iid: 4 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104252342 NLM23064714 2012048149 10.1007/s00330-012-2666-0 NLM23064714 104252342 ppf: 1059 ppct: 8 formats: fmt: @attributes: type: P tig: atl: First-pass contrast-enhanced renal MRA at 7 Tesla: initial results. aug: au: Umutlu, L Maderwald, S Kinner, S Kraff, O Bitz, A K Orzada, S Johst, S Wrede, K Forsting, M Ladd, M E Lauenstein, T C Quick, H H affil: Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Arendahls Wiese 199, 45141, Essen, Germany, Lale.Umutlu@uk-essen.de. sug: subj: Algorithms Image Enhancement Methods Image Interpretation, Computer Assisted Methods Magnetic Resonance Angiography Methods Organometallic Compounds Diagnostic Use Renal Artery Anatomy and Histology Adult Contrast Media Female Human Male Pilot Studies Reproducibility of Results Sensitivity and Specificity Adult: 19-44 years Female Male ab: Objective: The aim of this study was to assess the feasibility of first-pass contrast-enhanced renal MR angiography (MRA) at 7 T.Methods: In vivo first-pass contrast-enhanced high-field examinations were obtained in eight healthy subjects on a 7-T whole-body MRI. A custom-built body transmit/receive radiofrequency (RF) coil and RF system suitable for RF shimming were used for image acquisition. For dynamic imaging, gadobutrol was injected intravenously and coronal unenhanced, arterial and venous data sets using a T1-weighted spoiled gradient-echo sequence were obtained. Qualitative image analysis and assessment of artefact impairment were performed by two senior radiologists using a five-point scale (5 = excellent, 1 = non-diagnostic). SNR and CNR of the perirenal abdominal aorta and both main renal arteries were assessed.Results: Qualitative image evaluation revealed overall high-quality delineation of all assessed segments of the unenhanced arterial vasculature (meanunenhanced 4.13). Nevertheless, the application of contrast agent revealed an improvement in vessel delineation of all the vessel segments assessed, confirmed by qualitative (meanunenhanced 4.13 to meancontrast-enhanced 4.85) and quantitative analysis (SNR meanunenhanced 64.3 to meancontrast-enhanced 98.4).Conclusion: This study demonstrates the feasibility and current constraints of ultra-high-field contrast-enhanced renal MRA relative to unenhanced MRA. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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