Objectives In radiation therapy, the field-in-field (FIF) technique is used to prevent administration of unnecessarily high doses reduce toxicity. Recently, FIF has been for whole brain irradiation (WBI). Using technique, volume that receives a higher than prescribed dose (hotspot) can be largely reduced; however, treatment planning requires time. Therefore, burden on planners, we propose semia...

OBJECTIVE Cardiac irradiation during left-sided breast radiotherapy may lead to deleterious cardiac side effects. Using image guided radiotherapy, it is possible to exclude the heart from treatment fields and monitor reproducibility of virtual simulation (VS) fields at treatment delivery using electronic portal imaging (EPI). Retrospectively, we evaluate the incidence of cardiac irradiation at ...

The intensity modulated raster scanning technique enables an extremely precise irradiation of tumours, which can be fixed in position and do not move. This thesis investigates how to extend raster scanning to moving target volumes, like in the thorax. Two different strategies were studied: A rescanning of the volume which is not correlated to the target motion and an active realignment of the b...

OBJECTIVE Few studies have evaluated re-irradiation of lung cancer recurrences with stereotactic body radiotherapy (SBRT). This study evaluates outcomes with SBRT re-irradiation for recurrent lung cancer. METHODS Two hundred and seventy-eight patients treated with SBRT for lung cancer were retrospectively reviewed. Of those, 26 patients with 29 tumors were re-irradiated with SBRT. Ninety perc...

The aim of the present study was to evaluate the distinctions in survival and toxicity between patients with cervical cancer with common iliac node or para-aortic node involvement, who were treated with extended-field intensity-modulated radiotherapy (EF-IMRT) and patients with or without lower involved pelvic nodes, who were treated with pelvic IMRT. A total of 55 patients treated with EF-IMRT...

OBJECTIVE In patients with thoracic/abdominal esophageal cancer with no clinical evidence of lymph node metastasis, there is no consensus about whether the irradiation field should include regional lymph nodes. In this study, the extent of the irradiation field for clinical stage T1-3N0M0 esophageal cancer was determined based on the postoperative pathological results. METHODS From July 1989 ...

The paper presented the experimental results regarding the use of the cellulose triacetate (CTA) to determine the homogeneity degree of the irradiation field obtained in accelerated electron beam by scattering through aluminum foils and to evaluate absorbed dose into the material depth. The results indicated a reduced irradiation surface for thin scattering foil (0.1 mm). Both using thicker sca...