Retrospective Validation of a Computer-Assisted Quantification Model of Intracerebral Hemorrhage Volume on Accuracy, Precision, and Acquisition Time, Compared with Standard ABC/2 Manual Volume Calculation
| Autor: | Ameet C. Patel, Joseph M. Hoxworth, W. Xue, Sravanthi Vegunta, James R. Mitchell, Maria I. Aguilar, Bart M. Demaerschalk, Christine M. Zwart |
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| Rok vydání: | 2017 |
| Předmět: |
Accuracy and precision
medicine.medical_specialty Level set algorithm 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Humans Medicine Computer Simulation Radiology Nuclear Medicine and imaging Stroke Cerebral Hemorrhage Retrospective Studies Intracerebral hemorrhage business.industry Adult Brain Reproducibility of Results Retrospective cohort study medicine.disease Inter-rater reliability Anesthesia Acquisition time Neurology (clinical) Radiology Tomography X-Ray Computed business Algorithms 030217 neurology & neurosurgery Volume (compression) |
| Zdroj: | AJNR Am J Neuroradiol |
| ISSN: | 1936-959X 0195-6108 |
| DOI: | 10.3174/ajnr.a5256 |
| Popis: | BACKGROUND AND PURPOSE: Intracerebral hemorrhage accounts for 6.5%–19.6% of all acute strokes. Initial intracerebral hemorrhage volume and expansion are both independent predictors of clinical outcomes and mortality. Therefore, a rapid, unbiased, and precise measurement of intracerebral hemorrhage volume is a key component of clinical management. The most commonly used method, ABC/2, results in overestimation. We developed an interactive segmentation program, SegTool, using a novel graphic processing unit, level set algorithm. Until now, the speed, bias, and precision of SegTool had not been validated. MATERIALS AND METHODS: In a single stroke academic center, 2 vascular neurologists and 2 neuroradiologists independently performed a test-retest experiment that involved repeat measurements of static, unchanging intracerebral hemorrhage volumes on CT from 76 intracerebral hemorrhage cases. Measurements were made with SegTool and ABC/2. True intracerebral hemorrhage volumes were estimated from a consensus of repeat manual tracings by 2 operators. These data allowed us to estimate measurement bias, precision, and speed. RESULTS: The measurements with SegTool were not significantly different from the true intracerebral hemorrhage volumes, while ABC/2 overestimated volume by 45%. The interrater measurement variability with SegTool was 50% less than that with ABC/2. The average measurement times for ABC/2 and SegTool were 35.7 and 44.6 seconds, respectively. CONCLUSIONS: SegTool appears to have attributes superior to ABC/2 in terms of accuracy and interrater reliability with a 9-second delay in measurement time (on average); hence, it could be useful in clinical trials and practice. |
| Databáze: | OpenAIRE |
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