Evaluation of Automatic Measurement of the Intracranial Volume Based on Quantitative MR Imaging
| العنوان: | Evaluation of Automatic Measurement of the Intracranial Volume Based on Quantitative MR Imaging |
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| المؤلفون: | Anders Eklund, Richard Birgander, Khalid Ambarki, Anders Wahlin, Marcel Warntjes, Jan Malm, E. Petterson, Thomas Lindqvist |
| المصدر: | Europe PubMed Central AJNR Am J Neuroradiol |
| بيانات النشر: | American Society of Neuroradiology (ASNR), 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Adult, Male, medicine.medical_specialty, Sensitivity and Specificity, Pattern Recognition, Automated, Imaging, Three-Dimensional, Intracranial volume, Image Interpretation, Computer-Assisted, medicine, Humans, Radiology, Nuclear Medicine and imaging, Medical physics, medicine.diagnostic_test, business.industry, Quantitative mr, Brain, Reproducibility of Results, Magnetic resonance imaging, Organ Size, Image enhancement, Image Enhancement, Magnetic Resonance Imaging, Female, Neurology (clinical), business, Algorithms, Biomedical engineering |
| الوصف: | BACKGROUND AND PURPOSE: Brain size is commonly described in relation to ICV, whereby accurate assessment of this quantity is fundamental. Recently, an optimized MR sequence (QRAPMASTER) was developed for simultaneous quantification of T1, T2, and proton density. ICV can be measured automatically within minutes from QRAPMASTER outputs and a dedicated software, SyMRI. Automatic estimations of ICV were evaluated against the manual segmentation. MATERIALS AND METHODS: In 19 healthy subjects, manual segmentation of ICV was performed by 2 neuroradiologists (Obs1, Obs2) by using QBrain software and conventional T2-weighted images. The automatic segmentation from the QRAPMASTER output was performed by using SyMRI. Manual corrections of the automatic segmentation were performed (corrected-automatic) by Obs1 and Obs2, who were blinded from each other. Finally, the repeatability of the automatic method was evaluated in 6 additional healthy subjects, each having 6 repeated QRAPMASTER scans. The time required to measure ICV was recorded. RESULTS: No significant difference was found between reference and automatic (and corrected-automatic) ICV (P > .25). The mean difference between the reference and automatic measurement was −4.84 ± 19.57 mL (or 0.31 ± 1.35%). Mean differences between the reference and the corrected-automatic measurements were −0.47 ± 17.95 mL (−0.01 ± 1.24%) and −1.26 ± 17.68 mL (−0.06 ± 1.22%) for Obs1 and Obs2, respectively. The repeatability errors of the automatic and the corrected-automatic method were |
| تدمد: | 1936-959X 0195-6108 |
| DOI: | 10.3174/ajnr.a3067 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76ebc3763c9babdf174f43cbabc9b612 https://doi.org/10.3174/ajnr.a3067 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....76ebc3763c9babdf174f43cbabc9b612 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1936959X 01956108 |
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| DOI: | 10.3174/ajnr.a3067 |