{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,28]],"date-time":"2025-11-28T17:21:22Z","timestamp":1764350482502,"version":"3.37.3"},"reference-count":24,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2019,5,13]],"date-time":"2019-05-13T00:00:00Z","timestamp":1557705600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>This study aimed to compare the interobserver variabilities in magnetic resonance imaging (MRI)\/computed tomography (CT) fusion image\u2013based post-implant dosimetry of permanent prostate brachytherapy (PPB) between 1.5-T and 3.0-T MRI. The study included 60 patients. Of these patients, 30 underwent 1.5-T MRI and CT 30 days after seed implantation (1.5-T group), and 30 underwent 3.0-T MRI and CT 30 days after seed implantation (3.0-T group). All patients received PPB alone. Two radiation oncologists performed MRI\/CT fusion image\u2013based post-implant dosimetry, and the interobserver variabilities of dose\u2013volume histogram (DVH) parameters [dose (Gy) received by 90% of the prostate volume (prostate D90)], percentage of the prostate volume receiving at least the full prescribed dose (prostate V100), percentage of the prostate volume receiving at least 150% of the prescribed dose (prostate V150), dose (Gy) received by 5% of the urethral volume (urethral D5) and the urethral volume receiving at least 150% of the prescribed dose (urethral V150)] were retrospectively estimated using the paired Student\u2019s t test and Pearson\u2019s correlation coefficient. The Pearson\u2019s correlation coefficients of all DVH parameters were higher in the 3.0-T group than in the 1.5-T group (1.5-T vs 3.0-T: prostate D90, 0.65 vs 0.93; prostate V100, 0.62 vs 0.82; prostate V150, 0.97 vs 0.98; urethral D5, 0.92 vs 0.93; and urethral V150, 0.88 vs 0.93). In the paired Student\u2019s t test, no significant differences were observed in any of the DVH parameters between the two radiation oncologists in the 3.0-T group (0.068 \u2264 P \u2264 0.842); however, significant differences were observed in prostate D90 (P = 0.004), prostate V100 (P = 0.011) and prostate V150 (P = 0.002) between the oncologists in the 1.5-T group. The interobserver variability of DVH parameters in the MRI\/CT fusion image\u2013based post-implant dosimetry analysis of brachytherapy was lower with 3.0-T MRI than with 1.5-T MRI.<\/jats:p>","DOI":"10.1093\/jrr\/rrz012","type":"journal-article","created":{"date-parts":[[2019,3,22]],"date-time":"2019-03-22T08:10:57Z","timestamp":1553242257000},"page":"483-489","source":"Crossref","is-referenced-by-count":3,"title":["Interobserver variability of 3.0-tesla and 1.5-tesla magnetic resonance imaging\/computed tomography fusion image\u2013based post-implant dosimetry of prostate brachytherapy"],"prefix":"10.1093","volume":"60","author":[{"given":"Kenta","family":"Watanabe","sequence":"first","affiliation":[{"name":"Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Norihisa","family":"Katayama","sequence":"additional","affiliation":[{"name":"Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kuniaki","family":"Katsui","sequence":"additional","affiliation":[{"name":"Department of Proton Beam Therapy, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshi","family":"Matsushita","sequence":"additional","affiliation":[{"name":"Department of Radiology Medical Support Division Okayama University Hospital, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1107-2291","authenticated-orcid":false,"given":"Atsushi","family":"Takamoto","sequence":"additional","affiliation":[{"name":"Department of Urology, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Ihara","sequence":"additional","affiliation":[{"name":"Department of Proton Beam Therapy, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasutomo","family":"Nasu","sequence":"additional","affiliation":[{"name":"Department of Urology, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitsuhiro","family":"Takemoto","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology, Japanese Red Cross Society Himeji Hospital, 1-12-1 Shimoteno, Himeji, Hyogo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masahiro","family":"Kuroda","sequence":"additional","affiliation":[{"name":"Radiological Technology, Okayama University Graduate School of Health Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Susumu","family":"Kanazawa","sequence":"additional","affiliation":[{"name":"Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2019,5,13]]},"reference":[{"key":"2019071912395082200_rrz012C1","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1016\/S0360-3016(00)00598-8","article-title":"Failure-free survival following brachytherapy alone or external beam irradiation alone for T1\u20132 prostate tumors in 2222 patients: results from a single practice","volume":"48","author":"Brachman","year":"2000","journal-title":"Int J Radiat Oncol Biol Phys"},{"key":"2019071912395082200_rrz012C2","doi-asserted-by":"crossref","first-page":"597","DOI":"10.1016\/j.ijrobp.2006.06.023","article-title":"Comparison of MRI-based and CT\/MRI fusion-based postimplant dosimetric analysis of prostate brachytherapy","volume":"66","author":"Tanaka","year":"2006","journal-title":"Int J Radiat Oncol Biol Phys"},{"key":"2019071912395082200_rrz012C3","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1111\/j.1464-410X.2011.10827.x","article-title":"Comparative analysis of prostate-specific antigen free survival outcomes for patients with low, intermediate and high risk prostate cancer treatment by radical therapy. 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