Premium
Comparison of prostate and transition zone volume measured by the ellipsoid and planimetric methods with transrectal ultrasonography before seed implantation of prostate cancer
Author(s) -
Ikeda Tetsuhiro,
Shinohara Katsuto
Publication year - 2008
Publication title -
international journal of urology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 67
eISSN - 1442-2042
pISSN - 0919-8172
DOI - 10.1111/j.1442-2042.2007.01939.x
Subject(s) - medicine , prostate , ellipsoid , transrectal ultrasonography , ultrasound , prostate cancer , volume (thermodynamics) , ellipsoid method , nuclear medicine , prostate specific antigen , ultrasonography , urology , stage (stratigraphy) , cancer , radiology , geometry , geology , geodesy , mathematics , paleontology , physics , convex optimization , quantum mechanics , regular polygon , convex combination
A total of 122 men who were diagnosed with localized prostatic cancer underwent transrectal ultrasound and the volumes of their prostates and transitional zones were obtained using the planimetric method and the ellipsoid method. Mean age was 64.2 ±13.4 (48.2–85.8), and mean preimplant prostate specific antigen was 6.01 ± 2.35 mg/mL (0.92–15.5). The clinical stage was T1c in 70 patients, T2a in 46 and T2b in 6. Prostatic volumes and transitional zone volumes obtained by the planimetric method were 18 % and 39% greater than those obtained by the ellipsoid method, respectively. There were significant differences between the volumes obtained by the two different methods. However, there was a good correlation between the prostatic volume and the transitional zone volume obtained by both the ellipsoid method (r = 0.851) and the planimetric method (r = 0.908). The regression line of the prostate volume between these two methods was calculated as .