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.

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@article{7adcb15dc89c4a7487d7fe613b460645,
title = "Feasibility and evaluation of dual-source transmit 3D imaging of the orbits: Comparison to high-resolution conventional MRI at 3T",
abstract = "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.",
keywords = "Adolescent, Adult, Aged, Artifacts, Contrast Media, Feasibility Studies, Female, Humans, Image Enhancement/methods, Imaging, Three-Dimensional/methods, Magnetic Resonance Imaging/methods, Male, Middle Aged, Orbit/pathology, Orbital Diseases/diagnosis, Prospective Studies, Reproducibility of Results, Signal-To-Noise Ratio, Young Adult",
author = "Achim Seeger and Maximilian Schulze and Frank Schuettauf and Uwe Klose and Ulrike Ernemann and Till-Karsten Hauser",
note = "Copyright {\textcopyright} 2015 Elsevier Ireland Ltd. All rights reserved.",
year = "2015",
month = jun,
doi = "10.1016/j.ejrad.2015.03.008",
language = "English",
volume = "84",
pages = "1150--8",
journal = "EUR J RADIOL",
issn = "0720-048X",
publisher = "Elsevier",
number = "6",

}

RIS

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 -