title: Clinical application of computed tomography on prostate volume estimation in patients with lower urinary tract symptoms.
abstract: OBJECTIVE
  To compare estimated prostate volume (PV) based on computed tomography (CT) scan and transrectal ultrasonography (TRUS) in patients with lower urinary tract symptoms (LUTS).
  
  
  METHODS
  Between January 2010 and October 2012, 107 consecutive patients with LUTS were analyzed, retrospectively. PV measures were performed by the means of ellipsoid formula (PV = π/6 [width (cm) thick­ness (cm) length (cm)]) from TRUS (PVTRUS) and CT (PVCT ellipsoid). In addition, PV was calculated as the sum of the area of each slice and the CT slice interval using commercial software program (PVCT 3D reconstruction).
  
  
  RESULTS
  Mean PVCT ellipsoid was 40.63 & plusmn; 31.06 cm3 (range, 8.34-217.46). Mean PVTRUS and PVCT 3D reconstruction were 39.20 & plusmn; 33.04 (range, 4.00-223.81) and 45.30 & plusmn; 32.98 (range, 8.90-248.30), respectively. PVCT ellipsoid was highly correlated with PVTRUS and PVCT 3D reconstruction (r = 0.935, P < .001; r = .970, P < .001, respectively). Moreover, there was very strong agreement for PV measurements with all three methods (intraclass correlation coefficient = 0.934, P < .001).
  
  
  CONCLUSIONS
  PVCT ellipsoid is adequate method for quick volume assessment with reasonable accuracy. Therefore, we can easily predict PV by CT scan using ellipsoid formula without performing additional TRUS in patients with LUTS.& nbsp;
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Tae Wook
authors.initials: TW
authors.lastname: Kang
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Jae Mann
authors.initials: JM
authors.lastname: Song
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Kwang Jin
authors.initials: KJ
authors.lastname: Kim
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Hyun Keun
authors.initials: HK
authors.lastname: Byun
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Young Joo
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Chung
authors.affiliation: Department of Urology, Cheongju St. Mary's Hospital, Cheongju, Republic of Korea.
authors.forename: Yun Byung
authors.initials: YB
authors.lastname: Chae
authors.affiliation: Department of Urology, Konyang University, College of Medicine, Daejeon, Republic of Korea.
authors.forename: Hong Wook
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Department of Urology and Radiology, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea. geneuro95@yonsei.ac.kr.
authors.forename: Jae Hung
authors.initials: JH
authors.lastname: Jung
mesh_terms: D000368:Aged; D057186:Comparative Effectiveness Research; D061827:Dimensional Measurement Accuracy; D019160:Endosonography / Q000379:methods*; D006801:Humans; D059411:Lower Urinary Tract Symptoms / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011467:Prostate / Q000473:pathology*; D011856:Radiographic Image Enhancement / Q000379:methods; D056910:Republic of Korea; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*