Document Detail

Spleen size: how well do linear ultrasound measurements correlate with three-dimensional CT volume assessments?
MedLine Citation:
PMID:  12145129     Owner:  NLM     Status:  MEDLINE    
Ultrasound measurement of splenic length is standard practice, but it is not known how well this represents the true size of the spleen. Previous studies, using a combination of measurements from in vivo and resected spleens, were subject to error because of changes in splenic size. The aim of this study was to correlate the dimensions of the spleen measured by ultrasound with the splenic volume measured by helical CT. Ultrasound examination was performed on 50 adult patients at the time of their attendance for abdominal CT. Linear dimensions of the spleen were measured with the patient first in the supine and then in the right lateral decubitus (RLD) position. The splenic volume was calculated from a three-dimensional reconstruction of the CT images. There was good correlation, using Spearman's rank correlation, between ultrasound measurements and CT volumes with correlation coefficients exceeding 0.7 for all parameters except one. The linear measurement that correlated most closely with CT volume was the spleen width measured on a longitudinal section with the patient in the RLD position (correlation coefficient (r)=0.89, p<0.001). There was also good correlation between splenic length measured in the RLD position and CT volume (r=0.86, p<0.001). We conclude that a good correlation exists between in vivo ultrasound assessment of splenic size and true splenic volume. The most accurate single measurement is spleen width measured on a longitudinal section with the patient in the RLD position. However, measurement of splenic length, which is the most commonly used in clinical practice, also correlates well with splenic volume, particularly when performed with the patient in the RLD position.
P M Lamb; A Lund; R R Kanagasabay; A Martin; J A W Webb; R H Reznek
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The British journal of radiology     Volume:  75     ISSN:  0007-1285     ISO Abbreviation:  Br J Radiol     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-07-29     Completed Date:  2002-09-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0373125     Medline TA:  Br J Radiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  573-7     Citation Subset:  AIM; IM    
St Bartholomew's Hospital, West Smithfield, London EC1A 7BE, UK.
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MeSH Terms
Radiographic Image Enhancement / methods
Sensitivity and Specificity
Spleen / anatomy & histology,  radiography*,  ultrasonography*
Tomography, X-Ray Computed / methods*,  standards

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