Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Fast accurate MR thermometry using phase referenced asymmetric spin-echo EPI at high field

Streicher, M., Schäfer, A., Ivanov, D., Müller, D. K., Amadon, A., Reimer, E., et al. (2014). Fast accurate MR thermometry using phase referenced asymmetric spin-echo EPI at high field. Magnetic Resonance in Medicine, 71(2), 524-533. doi:10.1002/mrm.24681.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
Streicher_2013_Fast.pdf (Preprint), 636KB
 
Datei-Permalink:
-
Name:
Streicher_2013_Fast.pdf
Beschreibung:
-
OA-Status:
Sichtbarkeit:
Privat
MIME-Typ / Prüfsumme:
application/pdf
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
-
Lizenz:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Streicher, Markus1, Autor           
Schäfer, Andreas1, Autor           
Ivanov, Dimo1, Autor           
Müller, Dirk K.2, Autor           
Amadon, Alexis3, Autor
Reimer, Enrico1, Autor           
Huber, Laurentius1, Autor           
Dhital, Bibek1, Autor           
Rivera, Deborah1, Autor           
Kögler, Carsten1, Autor           
Trampel, Robert1, Autor           
Pampel, André2, Autor           
Turner, Robert1, Autor           
Affiliations:
1Department Neurophysics, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634550              
2Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              
3Neurospin, French Alternative Energies and Atomic Energy Commission (CEA), Gif-sur-Yvette, France, ou_persistent22              

Inhalt

einblenden:
ausblenden:
Schlagwörter: Referenced; MR thermometry; Fat; Spin-echo; Asymmetric; Proton resonance frequency shift
 Zusammenfassung: Purpose:

A novel highly accurate method for MR thermometry, effective at high field, is introduced and validated, which corrects for slow and fast field fluctuations by means of reference images.

Methods:

An asymmetric spin-echo (ASE) EPI sequence was made frequency-selective to water or a reference substance by controlling the slice-select gradient polarity, or the durations of the excitation and refocusing RF pulses. Images were acquired pairwise, and the temperature-sensitive water images were corrected for field fluctuations using the reference images. In a phantom RF heating experiment, dissolved dimethyl sulfoxide was used as a reference substance. Temperature stability was tested in-vivo on the human brain, referenced using subcutaneous scalp fat. Water and fat phase images were acquired only 50 ms apart. Bloch simulations validated the frequency selection accuracy.

Results:

ASE imaging using simple frequency selection methods provides highly accurate referenced MR thermometry in phantoms and in-vivo at 7 Tesla. Effects of field fluctuations caused by field drift, breathing and heart beat were corrected. The technique is highly robust against B1 inhomogeneities.

Conclusion:

Frequency selection using gradient-reversal can enable fast accurate referenced in-vivo MR thermometry, assisting thermal characterization of RF coils and possibly in-vivo SAR monitoring.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2012-11-272012-08-312013-01-152013-02-252014-02
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1002/mrm.24681
PMID: 23440917
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Magnetic Resonance in Medicine
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 71 (2) Artikelnummer: - Start- / Endseite: 524 - 533 Identifikator: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149