The treatment period over which radiation therapy is administered extends over several weeks. Since tumor shrinkage in response to radiation therapy and weight loss due to radiation-induced mucositis may impact on the dose distribution in both target and organ at risk in patients with head and neck cancer, the anatomical changes of tumor and neck volumes during this period should be taken into ...

Objective To evaluate in a cohort of superior sulcus tumors (SST) whether even large tumors can respond well to chemoradiotherapy and can be sterilized with modest doses of radiotherapy (45-50 Gy). Methods Patients with SST, treated with trimodality therapy at our institution between 2002 and 2011, who received 45-50 Gy radiotherapy, were included. Resection specimens were examined for remainin...

Extranodal natural killer/T-cell lymphoma (ENKTL), nasal type, is a rare form of non-Hodgkin lymphoma. Treatment of ENKTL primarily relies on radiation; thus, proper delineation of target volumes is critical. Currently, the ideal modalities for delineation of gross tumor volume for ENKTL are unknown. We describe three consecutive cases of localized ENKTL that presented to the Nova Scotia Cancer...

PURPOSE Magnetic resonance imaging-guided radiation therapy has entered clinical practice at several major treatment centers. Treatment of early-stage non-small cell lung cancer with stereotactic body radiation therapy is one potential application of this modality, as some form of respiratory motion management is important to address. We hypothesize that magnetic resonance imaging-guided tri-co...

PURPOSE Analyze inter-fraction volumetric changes of lung tumors treated with stereotactic body radiation therapy (SBRT) and determine if the volume changes during treatment can be predicted and thus considered in treatment planning. METHODS AND MATERIALS Kilo-voltage cone-beam CT (kV-CBCT) images obtained immediately prior to each fraction were used to monitor inter-fraction volumetric chang...

the aim of this study was assessing the adjuvant therapy of exercise on cytokines balance in mice with breast cancer tumor. twenty female balb/c mice were randomly assigned to experimental and control groups. after orientation in the environment, estrogen-receptor dependent breast cancer cells (mc4-l2) were injected to them and experimental group performed endurance training 5 day in week for 6...

In terms of assessing economic impact, one the most important elements in wood supply chain is measurement round wood. Besides one-by-one logs, logs are often measured when stacked at forest road. The gross volume includes wood, bark and airspace widely used for industrial assortments. increasing international attention given to photo-optical systems portable devices due their simplicity ...

PURPOSE To investigate the correlations in target volumes based on 18F-FDG PET/CT and four-dimensional CT (4DCT) to detect the feasibility of implementing PET in determining gross target volumes (GTV) for tumor motion for primary thoracic esophageal cancer (EC). METHODS Thirty-three patients with EC sequentially underwent contrast-enhanced 3DCT, 4DCT, and 18F-FDG PET-CT thoracic simulation. T...

The name “Brachytherapy” is derived from ancient Greek words for short distance (brachios) and treatment (therapy) and refers to the therapeutic use of encapsulated radionuclides placed within or close to the tumor. Brachytherapy (BT), used as an integral part of cancer treatment for almost a century, developed in last three decades a rapid growth with the development of afterloading devices an...