MR imaging of brain volumes: evaluation of a fully automatic software

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Ambarki, KhalidUmeå universitet,Radiofysik (author)

MR imaging of brain volumes : evaluation of a fully automatic software

Article/chapterEnglish2011

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2011
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LIBRIS-ID:oai:DiVA.org:umu-40046
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-40046URI
https://doi.org/10.3174/ajnr.A2275DOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

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BACKGROUND AND PURPOSE: Automatic assessment of brain volumes is needed in researchand clinical practice. Manual tracing is still the criterionstandard but is time-consuming. It is important to validatethe automatic tools to avoid the problems of clinical studiesdrawing conclusions on the basis of brain volumes estimatedwith methodologic errors. The objective of this study was toevaluate a new commercially available fully automatic softwarefor MR imaging of brain volume assessment. Automatic and expertmanual brain volumes were compared. MATERIALS AND METHODS: MR imaging (3T, axial T2 and FLAIR) was performed in 41 healthyelderly volunteers (mean age, 70 ± 6 years) and 20 patientswith hydrocephalus (mean age, 73 ± 7 years). The softwareQBrain was used to manually and automatically measure the followingbrain volumes: ICV, BTV, VV, and WMHV. The manual method hasbeen previously validated and was used as the reference. Agreementbetween the manual and automatic methods was evaluated by usinglinear regression and Bland-Altman plots. RESULTS: There were significant differences between the automatic andmanual methods regarding all volumes. The mean differences wereICV = 49 ± 93 mL (mean ± 2SD, n = 61), BTV = 11± 70 mL, VV = –6 ± 10 mL, and WMHV = 2.4± 9 mL. The automatic calculations of brain volumes tookapproximately 2 minutes per investigation. CONCLUSIONS: The automatic tool is promising and provides rapid assessmentof brain volumes. However, the software needs improvement beforeit is incorporated into research or daily use. Manual segmentationremains the reference method.

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Wåhlin, AndersUmeå universitet,Radiofysik(Swepub:umu)arswan02 (author)
Birgander, RichardUmeå universitet,Diagnostisk radiologi(Swepub:umu)ribi0006 (author)
Eklund, AndersUmeå universitet,Radiofysik(Swepub:umu)anek0025 (author)
Malm, JanUmeå universitet,Klinisk neurovetenskap(Swepub:umu)jama0002 (author)
Umeå universitetRadiofysik (creator_code:org_t)

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In:American Journal of Neuroradiology32:2, s. 408-4120195-61081936-959X

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