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Consistent intensity inhomogeneity correction in water-fat MRI
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2015 (Engelska)Ingår i: Journal of Magnetic Resonance Imaging, ISSN 1053-1807, E-ISSN 1522-2586, Vol. 42, nr 2Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

PURPOSE: To quantitatively and qualitatively evaluate the water-signal performance of the consistent intensity inhomogeneity correction (CIIC) method to correct for intensity inhomogeneities

METHODS: Water-fat volumes were acquired using 1.5 Tesla (T) and 3.0T symmetrically sampled 2-point Dixon three-dimensional MRI. Two datasets: (i) 10 muscle tissue regions of interest (ROIs) from 10 subjects acquired with both 1.5T and 3.0T whole-body MRI. (ii) Seven liver tissue ROIs from 36 patients imaged using 1.5T MRI at six time points after Gd-EOB-DTPA injection. The performance of CIIC was evaluated quantitatively by analyzing its impact on the dispersion and bias of the water image ROI intensities, and qualitatively using side-by-side image comparisons.

RESULTS: CIIC significantly ( P1.5T≤2.3×10-4,P3.0T≤1.0×10-6) decreased the nonphysiological intensity variance while preserving the average intensity levels. The side-by-side comparisons showed improved intensity consistency ( Pint⁡≤10-6) while not introducing artifacts ( Part=0.024) nor changed appearances ( Papp≤10-6).

CONCLUSION: CIIC improves the spatiotemporal intensity consistency in regions of a homogenous tissue type.

Ort, förlag, år, upplaga, sidor
Wiley-Blackwell, 2015. Vol. 42, nr 2
Nationell ämneskategori
Radiologi och bildbehandling
Forskningsämne
Medicinsk teknologi
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URN: urn:nbn:se:kth:diva-179948DOI: 10.1002/jmri.24778ISI: 000358258600026PubMedID: 25355066Scopus ID: 2-s2.0-84937570017OAI: oai:DiVA.org:kth-179948DiVA, id: diva2:890873
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QC 20160113

Tillgänglig från: 2016-01-05 Skapad: 2016-01-05 Senast uppdaterad: 2019-09-30Bibliografiskt granskad

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