PURPOSE Robotic Stereotactic Body Radiation Therapy with real-time tumor tracking has shown encouraging results for hepatic tumors with good efficacy and low toxicity. We studied the factors associated with local control of primary or secondary hepatic lesions post-SBRT. METHODS AND MATERIALS Since 2007, 153 stereotactic liver treatments were administered to 120 patients using the CyberKnife®...

Renal cell carcinoma (RCC) is traditionally considered to be radioresistant; therefore, conventional radiotherapy (RT) fraction sizes of 1.8 to 2 Gy are thought to have little role in the management of primary RCC, especially for curative disease. In the setting of metastatic RCC, conventionally fractionated RT has been an effective palliative treatment in 50% of patients. Recent technological ...

PURPOSE The purpose of this study was to evaluate the characteristics of a new rotating gamma system for stereotactic radiosurgery by comparison with a well accepted system. METHODS AND MATERIALS A novel gamma unit for stereotactic radiosurgery has been developed and distributed to 15 hospitals in China. The unit contains 30 cobalt-60 gamma radiation sources with initial activity of 200 Ci (7...

PURPOSE The American Society for Radiation Oncology (ASTRO) Physics Core Curriculum Subcommittee (PCCSC) has updated the recommended physics curriculum for radiation oncology resident education to improve consistency in teaching, intensity, and subject matter. METHODS AND MATERIALS The ASTRO PCCSC is composed of physicists and physicians involved in radiation oncology residency education. The...

The incidence of radiation necrosis has increased secondary to greater use of combined modality therapy for brain tumors and stereotactic radiosurgery. Given that its characteristics on standard imaging are no different that tumor recurrence, it is difficult to diagnose without use of more sophisticated imaging and nuclear medicine scans, although the accuracy of such scans is controversial. Hi...

BACKGROUND Glioblastoma (GBM) is the most common malignant primary brain tumor in adults. Tumor control and survival have improved with the use of radiotherapy (RT) plus concomitant and adjuvant chemotherapy, but the prognosis remain poor. In most cases the recurrence occurs within 7-9 months after primary treatment. Currently, many approaches are available for the salvage treatment of patients...

OBJECTIVE Solitary fibrous tumor is a rare tumor occurring in almost every anatomic location of human body; however, reports of malignant solitary fibrous tumor in the nasal and paranasal area are especially rare. In this report, we describe a case of non-recurrent malignant solitary fibrous tumor of the nasal and paranasal area. METHODS The patient was initially treated with nasal and parana...

High grade gliomas (HGG) account for the majority of primary central nervous system tumors and are infiltrative tumors with microscopic disease extending into the adjacent brain paranchyma, characterized by aggressive growth and poor prognosis. Patients are managed in a multidisciplinary team setting in order to ensure their care is guided by the most current evidenced based treatments. Current...

Synchrotron radiation is an innovative tool for the treatment of brain tumors. In the stereotactic synchrotron radiation therapy (SSRT) technique a radiation dose enhancement specific to the tumor is obtained. The tumor is loaded with a high atomic number (Z) element and it is irradiated in stereotactic conditions from several entrance angles. The aim of this work was to assess dosimetric prope...