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Comparison of contrast-enhanced T1-weighted FLAIR with BLADE, and spin-echo T1-weighted sequences in intracranial MRI.
Diagn Interv Radiol. 2009 Jun; 15(2):75-80.DI

Abstract

PURPOSE

We compared periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER, BLADE) MR technique with spin echo (SE) technique for evaluation of artifacts, and detection and delineation of brain lesions.

MATERIALS AND METHODS

Contrast-enhanced T1-weighted fluid attenuated inversion recovery (FLAIR) images with BLADE technique (CE T1W-FLAIR BLADE) and contrast-enhanced T1-weighted SE (CE T1W-SE) were performed in 50 patients with intracranial enhancing lesions. These techniques were compared by two neuroradiologists for qualitative analysis of artifacts, lesion detectability, lesion delineation from adjacent structures, and preferred imaging technique; and for quantitative variables, i.e., lesion-to-background and lesion-to-cerebrospinal fluid (CSF) contrast-to-noise (CNR) ratios. Reader agreement was assessed by kappa statistics.

RESULTS

All lesions depicted with the CE T1W-SE were also detected with the CE T1W-FLAIR BLADE technique. Delineation of lesions was better on CE T1W-FLAIR BLADE in the majority of patients. Flow-related artifacts were considerably reduced with CE T1W-FLAIR BLADE. A star-like artifact at the level of the 4(th) ventricle was noted on CE T1W-FLAIR BLADE but not on CE T1W-SE. The lesion-to-background CNR and lesion-to-CSF CNR did not show a statistically significant difference between the two techniques. CE T1W-FLAIR BLADE images were preferred by the observers over the CE T1w-SE images, indicating good interobserver agreement (k = 0.70).

CONCLUSION

CE T1W-FLAIR BLADE technique is superior to CE T1WSE for delineation of lesions and reduction of flow-related artifacts, especially within the posterior fossa, and is preferred by readers. CE T1W-FLAIR BLADE may be an alternative approach to imaging, especially for posterior fossa lesions.

Authors+Show Affiliations

Department of Radiology, Başkent University School of Medicine, Adana, Turkey. yalinozlem@hotmail.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19517375

Citation

Alkan, Ozlem, et al. "Comparison of Contrast-enhanced T1-weighted FLAIR With BLADE, and Spin-echo T1-weighted Sequences in Intracranial MRI." Diagnostic and Interventional Radiology (Ankara, Turkey), vol. 15, no. 2, 2009, pp. 75-80.
Alkan O, Kizilkiliç O, Yildirim T, et al. Comparison of contrast-enhanced T1-weighted FLAIR with BLADE, and spin-echo T1-weighted sequences in intracranial MRI. Diagn Interv Radiol. 2009;15(2):75-80.
Alkan, O., Kizilkiliç, O., Yildirim, T., & Alibek, S. (2009). Comparison of contrast-enhanced T1-weighted FLAIR with BLADE, and spin-echo T1-weighted sequences in intracranial MRI. Diagnostic and Interventional Radiology (Ankara, Turkey), 15(2), 75-80.
Alkan O, et al. Comparison of Contrast-enhanced T1-weighted FLAIR With BLADE, and Spin-echo T1-weighted Sequences in Intracranial MRI. Diagn Interv Radiol. 2009;15(2):75-80. PubMed PMID: 19517375.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of contrast-enhanced T1-weighted FLAIR with BLADE, and spin-echo T1-weighted sequences in intracranial MRI. AU - Alkan,Ozlem, AU - Kizilkiliç,Osman, AU - Yildirim,Tülin, AU - Alibek,Sedat, PY - 2009/6/12/entrez PY - 2009/6/12/pubmed PY - 2009/11/3/medline SP - 75 EP - 80 JF - Diagnostic and interventional radiology (Ankara, Turkey) JO - Diagn Interv Radiol VL - 15 IS - 2 N2 - PURPOSE: We compared periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER, BLADE) MR technique with spin echo (SE) technique for evaluation of artifacts, and detection and delineation of brain lesions. MATERIALS AND METHODS: Contrast-enhanced T1-weighted fluid attenuated inversion recovery (FLAIR) images with BLADE technique (CE T1W-FLAIR BLADE) and contrast-enhanced T1-weighted SE (CE T1W-SE) were performed in 50 patients with intracranial enhancing lesions. These techniques were compared by two neuroradiologists for qualitative analysis of artifacts, lesion detectability, lesion delineation from adjacent structures, and preferred imaging technique; and for quantitative variables, i.e., lesion-to-background and lesion-to-cerebrospinal fluid (CSF) contrast-to-noise (CNR) ratios. Reader agreement was assessed by kappa statistics. RESULTS: All lesions depicted with the CE T1W-SE were also detected with the CE T1W-FLAIR BLADE technique. Delineation of lesions was better on CE T1W-FLAIR BLADE in the majority of patients. Flow-related artifacts were considerably reduced with CE T1W-FLAIR BLADE. A star-like artifact at the level of the 4(th) ventricle was noted on CE T1W-FLAIR BLADE but not on CE T1W-SE. The lesion-to-background CNR and lesion-to-CSF CNR did not show a statistically significant difference between the two techniques. CE T1W-FLAIR BLADE images were preferred by the observers over the CE T1w-SE images, indicating good interobserver agreement (k = 0.70). CONCLUSION: CE T1W-FLAIR BLADE technique is superior to CE T1WSE for delineation of lesions and reduction of flow-related artifacts, especially within the posterior fossa, and is preferred by readers. CE T1W-FLAIR BLADE may be an alternative approach to imaging, especially for posterior fossa lesions. SN - 1305-3612 UR - https://www.unboundmedicine.com/medline/citation/19517375/Comparison_of_contrast_enhanced_T1_weighted_FLAIR_with_BLADE_and_spin_echo_T1_weighted_sequences_in_intracranial_MRI_ L2 - http://www.dirjournal.org/eng/makale/255/23/Full-Text DB - PRIME DP - Unbound Medicine ER -