Document Detail


Volume-dependent overestimation of spontaneous intracerebral hematoma volume by the ABC/2 formula.
MedLine Citation:
PMID:  19173095     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Although the ABC/2 formula has been widely used to estimate the volume of intracerebral hematoma (ICH), the formula tends to overestimate hematoma volume. The volume-related imprecision of the ABC/2 formula has not been documented quantitatively. PURPOSE: To investigate the volume-dependent overestimation of the ABC/2 formula by comparing it with computer-assisted volumetric analysis (CAVA). MATERIAL AND METHODS: Forty patients who had suffered spontaneous ICH and who had undergone non-enhanced brain computed tomography scans were enrolled in this study. The ICH volume was estimated based on the ABC/2 formula and also calculated by CAVA. Based on the ICH volume calculated by the CAVA method, the patients were divided into three groups: group 1 consisted of 17 patients with an ICH volume of less than 20 ml; group 2 comprised 13 patients with an ICH volume of 20 to 40 ml; and group 3 was composed of 10 patients with an ICH volume larger than 40 ml. RESULTS: The mean estimated hematoma volume was 43.6 ml when using the ABC/2 formula, compared with 33.8 ml when using the CAVA method. The mean estimated difference was 1.3 ml, 4.4 ml, and 31.4 ml for groups 1, 2, and 3, respectively, corresponding to an estimation error of 9.9%, 16.7%, and 37.1% by the ABC/2 formula (P<0.05). CONCLUSION: The ABC/2 formula significantly overestimates the volume of ICH. A positive association between the estimation error and the volume of ICH is demonstrated.
Authors:
Chih-Wei Wang; Chun-Jung Juan; Yi-Jui Liu; Hsian-He Hsu; Hua-Shan Liu; Cheng-Yu Chen; Chun-Jen Hsueh; Chung-Ping Lo; Hung-Wen Kao; Guo-Shu Huang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta radiologica (Stockholm, Sweden : 1987)     Volume:  50     ISSN:  1600-0455     ISO Abbreviation:  Acta Radiol     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-03-17     Completed Date:  2009-04-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8706123     Medline TA:  Acta Radiol     Country:  Sweden    
Other Details:
Languages:  eng     Pagination:  306-11     Citation Subset:  IM    
Affiliation:
Department of Radiology, Tri-Service General Hospital, Taipei, Taiwan, ROC.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Cerebral Hemorrhage / radiography*
Female
Humans
Image Processing, Computer-Assisted / statistics & numerical data*
Linear Models
Male
Mathematical Computing*
Middle Aged
Observer Variation
Reproducibility of Results
Software*
Spiral Cone-Beam Computed Tomography / statistics & numerical data*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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