Perinephric hematoma: semi-automated quantification of volume on MDCT: a feasibility study
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Pedram Rezai, Sandra Tochetto, Mauricio Galizia, Vahid Yaghmai
- چاپ و سال / کشور: 2010
Description
Background: To evaluate feasibility and reproducibility of quantification of perinephric hematoma volume on multidetector-row CT (MDCT). Methods: Perinephric hematomas in 63 patients (42 males, 21 females, median age: 49 years) imaged with contrastenhancedMDCT of the abdomen were evaluated.Asemiautomated segmentation software was applied to quantify hematoma volume. Reproducibility for quantification of hematoma volume was evaluated by repeated measurements in 20 patients. Statistical analyses were performed by using Student’s t test. Interobserver and intraobserver variability was evaluated by Bland–Altman plots. P < 0.05 denoted statistical significance Results: Quantification of hematoma volume was feasible in all cases. One step, direct quantification of volume was possible in 21 patients (33.33%) with small hematomas that did not reach upper and lower renal poles (range: 3.12–183.98 mL; mean: 39.92 mL). Quantification of hematoma size was performed indirectly in 42 patients (66.67%)with larger hematomas that extended beyond the renal poles by subtracting the ipsilateral renal volume from the combined kidney and hematoma volumes (range: 27.08–2431.3 mL; mean: 435.31 mL). Mean quantification time was 45 and 71 s for small and large hematomas, respectively (P < 0.05). Mean intraobserver and interobserver variability for determination of hematoma volume was 0.14%(95%CI,-1.57%to 1.85%) and 2.04%(95%CI, -1.77% to 5.85%), respectively. There was no significant difference in renal volume between ipsilateral and contralateral kidneys (P > 0.05). Conclusion: Quantification of perinephric hematoma was feasible fromMDCTdata in all patients and was reproducible.
Abdom Imaging (2011) 36:222–227 ª Springer Science+Business Media, LLC 2010 Published online: 22 June 2010
