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  • Müller, Christoph A.Albert-Ludwigs University Freiburg,German Cancer Research Centre (author)

Dynamic 2D and 3D mapping of hyperpolarized pyruvate to lactate conversion in vivo with efficient multi-echo balanced steady-state free precession at 3 T

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-03-10
  • Wiley,2020

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:f2c503df-d354-4dd1-b974-be514b1a9977
  • https://lup.lub.lu.se/record/f2c503df-d354-4dd1-b974-be514b1a9977URI
  • https://doi.org/10.1002/nbm.4291DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • The aim of this study was to acquire the transient MRI signal of hyperpolarized tracers and their metabolites efficiently, for which specialized imaging sequences are required. In this work, a multi-echo balanced steady-state free precession (me-bSSFP) sequence with Iterative Decomposition with Echo Asymmetry and Least squares estimation (IDEAL) reconstruction was implemented on a clinical 3 T positron-emission tomography/MRI system for fast 2D and 3D metabolic imaging. Simulations were conducted to obtain signal-efficient sequence protocols for the metabolic imaging of hyperpolarized biomolecules. The sequence was applied in vitro and in vivo for probing the enzymatic exchange of hyperpolarized [1–13C]pyruvate and [1–13C]lactate. Chemical shift resolution was achieved using a least-square, iterative chemical species separation algorithm in the reconstruction. In vitro, metabolic conversion rate measurements from me-bSSFP were compared with NMR spectroscopy and free induction decay-chemical shift imaging (FID-CSI). In vivo, a rat MAT-B-III tumor model was imaged with me-bSSFP and FID-CSI. 2D metabolite maps of [1–13C]pyruvate and [1–13C]lactate acquired with me-bSSFP showed the same spatial distributions as FID-CSI. The pyruvate-lactate conversion kinetics measured with me-bSSFP and NMR corresponded well. Dynamic 2D metabolite mapping with me-bSSFP enabled the acquisition of up to 420 time frames (scan time: 180-350 ms/frame) before the hyperpolarized [1–13C]pyruvate was relaxed below noise level. 3D metabolite mapping with a large field of view (180 × 180 × 48 mm3) and high spatial resolution (5.6 × 5.6 × 2 mm3) was conducted with me-bSSFP in a scan time of 8.2 seconds. It was concluded that Me-bSSFP improves the spatial and temporal resolution for metabolic imaging of hyperpolarized [1–13C]pyruvate and [1–13C]lactate compared with either of the FID-CSI or EPSI methods reported at 3 T, providing new possibilities for clinical and preclinical applications.

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  • Hundshammer, ChristianKlinikum rechts der Isar (author)
  • Braeuer, MiriamKlinikum rechts der Isar (author)
  • Skinner, Jason G.Klinikum rechts der Isar,Albert-Ludwigs University Freiburg (author)
  • Berner, StephanGerman Cancer Research Centre,Albert-Ludwigs University Freiburg (author)
  • Leupold, JochenAlbert-Ludwigs University Freiburg (author)
  • Düwel, StephanKlinikum rechts der Isar (author)
  • Nekolla, Stephan G.Klinikum rechts der Isar (author)
  • Månsson, SvenLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups,Skåne University Hospital(Swepub:lu)ront-sma (author)
  • Hansen, Adam E.University of Copenhagen (author)
  • von Elverfeldt, DominikAlbert-Ludwigs University Freiburg (author)
  • Ardenkjaer-Larsen, Jan H.Technical University of Denmark (author)
  • Schilling, FranzKlinikum rechts der Isar (author)
  • Schwaiger, MarkusKlinikum rechts der Isar (author)
  • Hennig, JürgenAlbert-Ludwigs University Freiburg (author)
  • Hövener, Jan BerndAlbert-Ludwigs University Freiburg,University Medical Center Schleswig-Holstein (author)
  • Albert-Ludwigs University FreiburgGerman Cancer Research Centre (creator_code:org_t)

Related titles

  • In:NMR in Biomedicine: Wiley33:60952-34801099-1492

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