A spiral spin-echo MR imaging technique for improved flow artifact suppression in T1-weighted postcontrast brain imaging

A comparison with Cartesian turbo spin-echo

Z. Li, H. H. Hu, J. H. Miller, J. P. Karis, P. Cornejo, D. Wang, James Pipe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

BACKGROUND AND PURPOSE: A challenge with the T1-weighted postcontrast Cartesian spin-echo and turbo spin-echo brain MR imaging is the presence of flow artifacts. Our aim was to develop a rapid 2D spiral spin-echo sequence for T1-weighted MR imaging with minimal flow artifacts and to compare it with a conventional Cartesian 2D turbo spin-echo sequence. MATERIALS AND METHODS: T1-weighted brain imaging was performed in 24 pediatric patients. After the administration of intravenous gadolinium contrast agent, a reference Cartesian TSE sequence with a scanning time of 2 minutes 30 seconds was performed, followed by the proposed spiral spin-echo sequence with a scanning time of 1 minutes 18 seconds, with similar spatial resolution and volumetric coverage. The results were reviewed independently and blindly by 3 neuroradiologists. Scores from a 3-point scale were assigned in 3 categories: flow artifact reduction, subjective preference, and lesion conspicuity, if any. The Wilcoxon signed rank test was performed to evaluate the reviewer scores. The t test was used to evaluate the SNR. The Fleiss k coefficient was calculated to examine interreader agreement. RESULTS: In 23 cases, spiral spin-echo was scored over Cartesian TSE in flow artifact reduction (P <.001). In 21 cases, spiral spin-echo was rated superior in subjective preference (P <.001). Ten patients were identified with lesions, and no statistically significant difference in lesion conspicuity was observed between the 2 sequences. There was no statistically significant difference in SNR between the 2 techniques. The Fleiss k coefficient was 0.79 (95% confidence interval, 0.65-0.93). CONCLUSIONS: The proposed spiral spin-echo pulse sequence provides postcontrast images with minimal flow artifacts at a faster scanning time than its Cartesian TSE counterpart.

Original languageEnglish (US)
Pages (from-to)642-647
Number of pages6
JournalAmerican Journal of Neuroradiology
Volume37
Issue number4
DOIs
StatePublished - Apr 1 2016
Externally publishedYes

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Neuroimaging
Artifacts
Magnetic Resonance Imaging
Gadolinium
Nonparametric Statistics
Intravenous Administration
Contrast Media
Confidence Intervals
Pediatrics

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

Cite this

A spiral spin-echo MR imaging technique for improved flow artifact suppression in T1-weighted postcontrast brain imaging : A comparison with Cartesian turbo spin-echo. / Li, Z.; Hu, H. H.; Miller, J. H.; Karis, J. P.; Cornejo, P.; Wang, D.; Pipe, James.

In: American Journal of Neuroradiology, Vol. 37, No. 4, 01.04.2016, p. 642-647.

Research output: Contribution to journalArticle

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abstract = "BACKGROUND AND PURPOSE: A challenge with the T1-weighted postcontrast Cartesian spin-echo and turbo spin-echo brain MR imaging is the presence of flow artifacts. Our aim was to develop a rapid 2D spiral spin-echo sequence for T1-weighted MR imaging with minimal flow artifacts and to compare it with a conventional Cartesian 2D turbo spin-echo sequence. MATERIALS AND METHODS: T1-weighted brain imaging was performed in 24 pediatric patients. After the administration of intravenous gadolinium contrast agent, a reference Cartesian TSE sequence with a scanning time of 2 minutes 30 seconds was performed, followed by the proposed spiral spin-echo sequence with a scanning time of 1 minutes 18 seconds, with similar spatial resolution and volumetric coverage. The results were reviewed independently and blindly by 3 neuroradiologists. Scores from a 3-point scale were assigned in 3 categories: flow artifact reduction, subjective preference, and lesion conspicuity, if any. The Wilcoxon signed rank test was performed to evaluate the reviewer scores. The t test was used to evaluate the SNR. The Fleiss k coefficient was calculated to examine interreader agreement. RESULTS: In 23 cases, spiral spin-echo was scored over Cartesian TSE in flow artifact reduction (P <.001). In 21 cases, spiral spin-echo was rated superior in subjective preference (P <.001). Ten patients were identified with lesions, and no statistically significant difference in lesion conspicuity was observed between the 2 sequences. There was no statistically significant difference in SNR between the 2 techniques. The Fleiss k coefficient was 0.79 (95{\%} confidence interval, 0.65-0.93). CONCLUSIONS: The proposed spiral spin-echo pulse sequence provides postcontrast images with minimal flow artifacts at a faster scanning time than its Cartesian TSE counterpart.",
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