PURPOSE: To compare the differences in prostate volume assessed by computerized tomography (CT), step-section transrectal ultrasound (TRUS-step), and TRUS with ellipsoid-formula volume calculation (TRUS-ellipsoid). METHODS AND MATERIALS: Thirty-one patients with localized prostate cancer treated with combined external conformal radiotherapy and high dose rate brachytherapy, who had prostate volumes evaluated using CT, TRUS-step and TRUS-ellipsoid according to our clinical routine for dose planning. The measurements were collected retrospectively based on actual dose-plans. RESULTS: The prostate volume was on average 34 cc (range 18-60 cc) according to CT, 28 cc (range 12-57 cc) and 24 cc (range 13-44 cc) according to TRUS-step and TRUS-ellipsoid, respectively. The differences between the lengths measured were most pronounced with a mean length of 4.5 cm (range 3.0-6.0 cm) defined by CT as compared to 3.6 cm (range 3.0-5.0 cm) and 3.6 cm (range 2.8-5.0 cm) when defined by TRUS-step and TRUS-ellipsoid, respectively. CONCLUSION: CT defined volumes are 30% larger than volumes defined with TRUS-step. This is probably due to uncertainty in defining the apex of the prostate and thereby the length of the prostate using CT. When defining target in radiotherapy, it is important to be aware of the differences in volumes depending on the technique used.
PURPOSE: To compare the differences in prostate volume assessed by computerized tomography (CT), step-section transrectal ultrasound (TRUS-step), and TRUS with ellipsoid-formula volume calculation (TRUS-ellipsoid). METHODS AND MATERIALS: Thirty-one patients with localized prostate cancer treated with combined external conformal radiotherapy and high dose rate brachytherapy, who had prostate volumes evaluated using CT, TRUS-step and TRUS-ellipsoid according to our clinical routine for dose planning. The measurements were collected retrospectively based on actual dose-plans. RESULTS: The prostate volume was on average 34 cc (range 18-60 cc) according to CT, 28 cc (range 12-57 cc) and 24 cc (range 13-44 cc) according to TRUS-step and TRUS-ellipsoid, respectively. The differences between the lengths measured were most pronounced with a mean length of 4.5 cm (range 3.0-6.0 cm) defined by CT as compared to 3.6 cm (range 3.0-5.0 cm) and 3.6 cm (range 2.8-5.0 cm) when defined by TRUS-step and TRUS-ellipsoid, respectively. CONCLUSION: CT defined volumes are 30% larger than volumes defined with TRUS-step. This is probably due to uncertainty in defining the apex of the prostate and thereby the length of the prostate using CT. When defining target in radiotherapy, it is important to be aware of the differences in volumes depending on the technique used.
Authors: Sung Han Kim; Boram Park; Whi-An Kwon; Jae Young Joung; Ho Kyung Seo; Jinsoo Chung; Kang Hyun Lee Journal: Biomed Res Int Date: 2019-03-31 Impact factor: 3.411
Authors: Markus Karl Alfred Herrmann; Tammo Gsänger; Arne Strauss; Tereza Kertesz; Hendrik A Wolff; Hans Christiansen; Hilke Vorwerk; Clemens Friedrich Hess; Andrea Hille Journal: Strahlenther Onkol Date: 2009-06-09 Impact factor: 3.621
Authors: Nicholas G Zaorsky; Timothy N Showalter; Gary A Ezzell; Paul L Nguyen; Dean G Assimos; Anthony V D'Amico; Alexander R Gottschalk; Gary S Gustafson; Sameer R Keole; Stanley L Liauw; Shane Lloyd; Patrick W McLaughlin; Benjamin Movsas; Bradley R Prestidge; Al V Taira; Neha Vapiwala; Brian J Davis Journal: Adv Radiat Oncol Date: 2016-10-20
Authors: Katharina Haverkamp; Lisa Katharina Harder; Nora Sophie Marita Kuhnt; Matthias Lüpke; Ingo Nolte; Patrick Wefstaedt Journal: BMC Vet Res Date: 2019-10-22 Impact factor: 2.741