Matched-pair analysis and dosimetric variations of two types of software for interstitial permanent brachytherapy for prostate cancer.

The purpose of this study was to determine whether identical dosimetric results could be achieved using different planning software for permanent interstitial brachytherapy for prostate cancer. Data from 492 patients treated with brachytherapy were used for matched-pair analysis. Interplant and Variseed were used as software for ultrasound-based treatment planning.

Differences between intraoperative ultrasound-based dosimetry and postoperative computed tomography-based dosimetry for permanent interstitial prostate brachytherapy.

Purpose: To compare the results of intraoperative ultrasound (US)-based dosimetry with those of postimplant computed tomography (CT)-based dosimetry after (125)I prostate brachytherapy.

Methods And Materials: Subjects comprised 160 patients who underwent prostate brachytherapy using (125)I seed implants. Prescribed dose was set as 145 Gy to the periphery of the prostate.

Cost comparison of curative therapies for localized prostate cancer in Japan: a single-institution experience.

Purpose: In addition to open surgery, curative therapies for prostate cancer now include endoscopic surgery and radiation therapies. Because of the expansion and subdivision of treatment methods for prostate cancer, the medical fee point schedule in Japan was revised in fiscal year 2006. We examined changes in medical income and expenditure after this revision of the medical fee system.

Genitourinary toxicity after high-dose-rate (HDR) brachytherapy combined with Hypofractionated External beam radiotherapy for localized prostate cancer: an analysis to determine the correlation between dose-volume histogram parameters in HDR brachytherapy and severity of toxicity.

Purpose: To evaluate the severity of genitourinary (GU) toxicity in high-dose-rate (HDR) brachytherapy combined with hypofractionated external beam radiotherapy (EBRT) for prostate cancer and to explore factors that might affect the severity of GU toxicity.

Methods And Materials: A total of 100 Japanese men with prostate cancer underwent (192)Ir HDR brachytherapy combined with hypofractionated EBRT. Mean (SD) dose to 90% of the planning target volume was 6.

Interactive-plan technique conquers the disadvantages of volume-reducing hormone therapy in 125I permanent implantation for localized prostate cancer.

Background: The purpose of this study was to assess the impact of hormone therapy on post-implant dosimetry in patients in whom pre-plan and interactive-plan techniques were used for transperineal brachytherapy against prostatic cancer.

Methods: The subjects comprised 244 patients treated using (125)I seed implantation as monotherapy. The prescribed dose to the periphery of the prostate was 145 Gy.

Needle position during (125)I seed implantation: accurately recognized by sagittal transrectal ultrasonography [corrected].

Purpose: The aim of this study was to assess the variation of probe rotation angles for detecting a single needle using sagittal images of transrectal ultrasonography (TRUS).

Materials And Methods: A phantom study was performed. One needle was inserted through each of 10 holes of the template, and variations in the probe rotation angles for detecting the needle were measured.

Inter-software variability in post-implanted CT analysis for interstitial permanent brachytherapy for prostate cancer: differences in automatically detected seed location.

Purpose. The present study investigated inter-software variability in automatically detected seed location and dose volume histogram (DVH). Materials and methods.

Four-year experience of interstitial permanent brachytherapy for Japanese men with localized prostate cancer.

Objective: To report 4 year results obtained with our initial 100 patients with localized prostate cancer treated by interstitial permanent brachytherapy.

Methods: One-hundred Japanese men with clinically localized prostate cancer underwent interstitial permanent prostate brachytherapy using (125)I seeds. Median follow-up was 36 months (range, 30-42 months).

Difference in rectal dosimetry between pre-plan and post-implant analysis in transperineal interstitial brachytherapy for prostate cancer.

Background And Purpose: To investigate differences in rectal dosimetry between pre-plan ultrasonography (US) and post-implant computed tomography (CT).

Patients And Methods: Subjects comprised 49 patients who underwent prostate brachytherapy using (125)I seed implants. Prescribed dose was 145Gy to the periphery of the prostate.

Simple technique to visualize random set-up displacements using a commercially available radiotherapy planning system.

Purpose: To visualize random set-up displacements in isodose distribution images, we introduce a simple technique using a commercially available radiotherapy planning system (RTP).

Materials And Methods: A distribution of set-up displacement is known to be compatible with that of a Gaussian distribution. Based on that assumption, 41 intentionally misaligned beams with 1-mm intervals were planned in the respective weights according to Gaussian distribution.