Okayama University Medical SchoolActa Medica Okayama0386-300X6942015Comparison of Field-in-Field Radiotherapy with Conformal Radiotherapy for Unilateral Cervical Malignant Lymphoma189195ENMakoYamashitaNorihisaKatayamaTakahiroWakiKuniakiKatsuiKengoHimeiMitsuhiroTakemotoSusumuKanazawaOriginal Article10.18926/AMO/53554This study compared field-in-field (FIF) radiotherapy with conformal radiotherapy with physical wedges for the treatment of unilateral cervical malignant lymphoma. Two treatment plans, the FIF technique and conformal RT, were generated for each of 32 patients with unilateral cervical malignant lymphoma. To compare the 2 treatment plans, dose-volume histograms of the planning target volume (PTV), the thyroid, submandibular gland, carotid artery, mucosa, spinal cord, and surrounding normal tissue, and monitor unit (MU) were analyzed. The FIF technique showed significant reduction in the mean dose of thyroid, submandibular gland, carotid artery and mucosa, the maximum dose of the spinal cord and PTV, and the volume receiving107% of the prescribed dose of surrounding normal tissue (p0.001). In addition, there were gains in the homogeneity index of the PTV for FIF. Furthermore, the total MU was also lower for the FIF technique than for the wedge technique (p0.001). Compared with the wedge technique, the FIF technique improved the dose homogeneity of the PTV, reduced the dose to normal structures, and was associated with fewer MUs in the treatment of patients with cervical malignant lymphoma.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7112017Interfractional Seminal Vesicle Motion Relative to the Prostate Gland for Image-guided Radiotherapy for Prostate Cancer with/without Androgen Deprivation Therapy: A Retrospective Cohort Study3139ENTakahiroWakiDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKuniakiKatsuiDepartment of Radiology, Okayama University HospitalToshiharuMitsuhashiCenter for Innovative Clinical Medicine, Okayama University HospitalTakeshiOgataDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNorihisaKatayamaDepartment of Radiology, Okayama University HospitalMitsuhiroTakemotoDepartment of Radiology, Japanese Red Cross Society Himeji HospitalYasutomoNasuDepartment of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromiKumonDepartment of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSusumuKanazawaDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOriginal Article10.18926/AMO/54823We investigated differences in seminal vesicle (SV) length and interfractional SV motion relative to the prostate gland in prostate cancer patients. We compared 32 patients who received androgen deprivation therapy (ADT) before radiotherapy with 12 patients receiving radiotherapy alone at Okayama University Hospital in August 2008-July 2011. We examined the right and left SVsf length and motion by computed tomography (CT) to determine the ADTfs effects and analyzed 347 CT scans in a multiple linear regression model. The ADT patientsf SV length was significantly shorter than the non-ADT patientsf. The differences in right and left SV lengths between the ADT and non-ADT patients were 6.8 mm (95% CI 2.0-11.7 mm) and 7.2 mm (95% CI 3.1-11.3 mm) respectively in an adjusted regression model. SV motion did not differ between the ADT and non-ADT patients in terms of interfractional motion of the SV tips and the SVsf center relative to the prostate gland. The ADT patients had significantly shorter SVs compared to the non-ADT patients, but no difference in SV motion was observed. SV interfractional motion should thus be compensated using the same planning margins, regardless of whether ADT is used.No potential conflict of interest relevant to this article was reported.