Feasibility and evaluation of dual-source transmit 3D imaging of the orbits
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Feasibility and evaluation of dual-source transmit 3D imaging of the orbits : Comparison to high-resolution conventional MRI at 3T. / Seeger, Achim; Schulze, Maximilian; Schuettauf, Frank; Klose, Uwe; Ernemann, Ulrike; Hauser, Till-Karsten.
in: EUR J RADIOL, Jahrgang 84, Nr. 6, 06.2015, S. 1150-8.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Feasibility and evaluation of dual-source transmit 3D imaging of the orbits
T2 - Comparison to high-resolution conventional MRI at 3T
AU - Seeger, Achim
AU - Schulze, Maximilian
AU - Schuettauf, Frank
AU - Klose, Uwe
AU - Ernemann, Ulrike
AU - Hauser, Till-Karsten
N1 - Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.
PY - 2015/6
Y1 - 2015/6
N2 - PURPOSE: To prospectively compare the image quality and diagnostic performance of orbital MR images obtained by using a dual-source parallel transmission (pTX) 3D sequence (Sampling Perfection with Application optimized Contrasts using different flip angle Evolution, SPACE) with the image quality of conventional high-resolution standard protocol for clinical use in patients at 3T.MATERIALS AND METHODS: After obtaining institutional review board approval and patient consent, 32 patients with clinical indication for orbital MRI were examined using a high-resolution conventional sequences and 3D pTX SPACE sequences. Quantitative measurements, image quality of the healthy orbit, incidence of artifacts, and the subjective diagnostic performance to establish diagnosis was rated. Statistical significance was calculated by using a Student's t-test and nonparametric Wilcoxon signed rank test.RESULTS: Length measurements were comparable in the two techniques, 3D pTX SPACE resulted in significant faster image acquisition with higher spatial resolution and less motion artifacts as well as better delineation of the optic nerve sheath. However, estimated contrast-to-noise and signal-to-noise and overall image quality as well as subjective scores of the conventional TSE imaging were rated significantly higher. The conventional MR sequences were the preferred techniques by the readers.CONCLUSION: This study demonstrates the feasibility of 3D pTX SPACE of the orbit resulting in a rapid acquisition of isotropic high-resolution images. Although no pathology was missed in 3D pTX SPACE, conventional MRI techniques showed the higher diagnostic confidence in our study, presumably due to the higher signal-to-noise and contrast-to-noise ratios. We observed high-resolution TSE imaging to be the preferred technique, 3D pTX SPACE cannot replace conventional MRI so far.
AB - PURPOSE: To prospectively compare the image quality and diagnostic performance of orbital MR images obtained by using a dual-source parallel transmission (pTX) 3D sequence (Sampling Perfection with Application optimized Contrasts using different flip angle Evolution, SPACE) with the image quality of conventional high-resolution standard protocol for clinical use in patients at 3T.MATERIALS AND METHODS: After obtaining institutional review board approval and patient consent, 32 patients with clinical indication for orbital MRI were examined using a high-resolution conventional sequences and 3D pTX SPACE sequences. Quantitative measurements, image quality of the healthy orbit, incidence of artifacts, and the subjective diagnostic performance to establish diagnosis was rated. Statistical significance was calculated by using a Student's t-test and nonparametric Wilcoxon signed rank test.RESULTS: Length measurements were comparable in the two techniques, 3D pTX SPACE resulted in significant faster image acquisition with higher spatial resolution and less motion artifacts as well as better delineation of the optic nerve sheath. However, estimated contrast-to-noise and signal-to-noise and overall image quality as well as subjective scores of the conventional TSE imaging were rated significantly higher. The conventional MR sequences were the preferred techniques by the readers.CONCLUSION: This study demonstrates the feasibility of 3D pTX SPACE of the orbit resulting in a rapid acquisition of isotropic high-resolution images. Although no pathology was missed in 3D pTX SPACE, conventional MRI techniques showed the higher diagnostic confidence in our study, presumably due to the higher signal-to-noise and contrast-to-noise ratios. We observed high-resolution TSE imaging to be the preferred technique, 3D pTX SPACE cannot replace conventional MRI so far.
KW - Adolescent
KW - Adult
KW - Aged
KW - Artifacts
KW - Contrast Media
KW - Feasibility Studies
KW - Female
KW - Humans
KW - Image Enhancement/methods
KW - Imaging, Three-Dimensional/methods
KW - Magnetic Resonance Imaging/methods
KW - Male
KW - Middle Aged
KW - Orbit/pathology
KW - Orbital Diseases/diagnosis
KW - Prospective Studies
KW - Reproducibility of Results
KW - Signal-To-Noise Ratio
KW - Young Adult
U2 - 10.1016/j.ejrad.2015.03.008
DO - 10.1016/j.ejrad.2015.03.008
M3 - SCORING: Journal article
C2 - 25824643
VL - 84
SP - 1150
EP - 1158
JO - EUR J RADIOL
JF - EUR J RADIOL
SN - 0720-048X
IS - 6
ER -