Background: The aim of this study is to assess and document the dimensions of the normal spleen measured on computed tomography (CT) images with the normal splenic volume measured by Cavalieri principle on CT images and thereby serve as a baseline for comparison in cases of splenomegaly using abdominal CT. To investigate the relationship between these changes and body mass index, gender, abdominal diameters. Materials and methods: We retrospectively reviewed abdominal CT examinations of 212 adults between the ages of 20 and 88 years. There were seven groups of patients. The spleen volume (SV) measurements using abdominal CT images of each patient on the Image Information Systems were performed with Cavalieri principle. Results: The mean SV and splenic length (SL), width (SW), and thickness (ST) for the total study population of 212 patients was 198 ± 88 cm³, 9.96 ± 2.1 cm, 8.87 ± 1.6 cm and 4.58 ± 0.8 cm, respectively. There was a strong correlation between SV and ST (r = 0.752, p < 0.001), SL (r = 0.735, p < 0.001), SW (r = 0.681, p < 0.001) mean values of total study population. Comparison between mean splenic dimension parameters for males and females showed a statistically significant difference (p = 0.032 for SV, p = 0.04 for ST) but no statistically significant difference with SL and SW. Also there was a positive correlation between SV and body height, sagittal abdominal diameter and transvers abdominal diameter in mean of total groups and female groups, there was no correlation in males. Conclusions: The normal reference ranges for SV and size given in this study can serve as a standard to judge whether splenomegaly is present in patients. (Folia Morphol 2014; 73, 3: 331–338)
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