title: A novel method for the angiographic estimation of the percentage of spleen volume embolized during partial splenic embolization.
abstract: OBJECTIVE
  To evaluate the efficacy of estimating the volume of spleen embolized in partial splenic embolization (PSE) by measuring the diameters of the splenic artery and its branches.
  
  
  METHODS
  A total of 43 liver cirrhosis patients (mean age, 62.19±9.65 years) with thrombocytopenia were included. Among these, 24 patients underwent a follow-up CT scan which showed a correlation between angiographic estimation and measured embolized splenic volume. Estimated splenic embolization volume was calculated by a method based on diameters of the splenic artery and its branches. The diameters of each of the splenic arteries and branches were measured via 2D angiographic images. Embolization was performed with gelatin sponges. Patients underwent follow-up with serial measurement of blood counts and liver function tests. The actual volume of embolized spleen was determined by computed tomography (CT) measuring the volumes of embolized and non-embolized spleen two months after PSE.
  
  
  RESULTS
  PSE was performed without immediate major complications. The mean WBC count significantly increased from 3.81±1.69×10(3)/mm(3) before PSE to 8.56±3.14×10(3)/mm(3) at 1 week after PSE (P<0.001). Mean platelet count significantly increased from 62.00±22.62×10(3)/mm(3) before PSE to 95.40±46.29×10(3)/mm(3) 1 week after PSE (P<0.001). The measured embolization ratio was positively correlated with estimated embolization ratio (Spearman's rho [ρ]=0.687, P<0.001). The mean difference between the actual embolization ratio and the estimated embolization ratio was 16.16±8.96%.
  
  
  CONCLUSIONS
  The method provides a simple method to quantitatively estimate embolized splenic volume with a correlation of measured embolization ratio to estimated embolization ratio of Spearman's ρ=0.687.
authors: Department of Diagnostic Radiology, National Cheng-Kung University Hospital, No. 138 Sheng Li Road, Tainan 704, Taiwan, ROC.
authors: Ming-Ching
authors: MC
authors: Ou
authors: Ming-Tsung
authors: MT
authors: Chuang
authors: Xi-Zhang
authors: XZ
authors: Lin
authors: Hong-Ming
authors: HM
authors: Tsai
authors: Shu-Yuan
authors: SY
authors: Chen
authors: Yi-Sheng
authors: YS
authors: Liu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods*; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D005781:Gelatin Sponge, Absorbable / Q000627:therapeutic use*; D006801:Humans; D006971:Hypersplenism / Q000000981:diagnostic imaging* / Q000517:prevention & control*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013157:Splenic Artery / Q000000981:diagnostic imaging*; D016896:Treatment Outcome