Objective: In our study, we aimed to compare the dose distrubutions of Accuray brand TomoTherapy device Volo treatment planning system lung stereoactic body radiation therapy (SBRT) and intensity-adjusted in cancer distributions obtained using (IMRT) techniques environmental doses.Matetial Method: Computed Tomography (CT) images 7 patients were transferred MIM contouring station for measurement...

PURPOSE/OBJECTIVE(S) Stereotactic body radiation therapy (SBRT) has been shown to have increased local control and overall survival relative to conventional external beam radiation therapy in patients with medically inoperable stage I non-small cell lung cancer (NSCLC). Excellent rates of local control have been demonstrated both in clinical trials and in single-center studies at large academic...

The aim of this study was to evaluate the efficacy and toxicity of stereotactic body radiation therapy (SBRT) in the treatment of patients with liver metastases. Between August 2006 and July 2011, patients with 1-4 liver metastases were enrolled and treated with SBRT using the CyberKnife(®) system at Tianjin Medical University Cancer Institute and Hospital. The metastases were from different pr...

The purpose of this study was to evaluate the impact of emphysematous changes in lung on dosimetric parameters in stereotactic body radiation therapy (SBRT) for lung tumor. A total of 72 treatment plans were reviewed, and dosimetric factors [including homogeneity index (HI) and conformity index (CI)] were evaluated. Emphysematous changes in lung were observed in 43 patients (60%). Patients were...

We are developing an innovative dynamic tumor tracking irradiation technique using gold markers implanted around a tumor as a surrogate signal, a real-time marker detection system, and a gimbaled X-ray head in the Vero4DRT. The gold markers implanted in a normal organ will produce uncertainty in the dose calculation during treatment planning because the photon mass attenuation coefficient of a ...

BACKGROUND The purpose of this study was to evaluate the prognostic impact of Positron Emission Tomography Response Criteria in Solid Tumors (PERCIST) and Response Evaluation Criteria in Solid Tumors (RECIST) and of pre- and post-treatment maximum Standard Uptake Value (SUVmax) in regards to survival and tumor control for patients treated for early-stage non-small cell lung cancer (ES-NSCLC) wi...

Introduction Accurate delineation of tumor targets is crucial for stereotactic body radiation therapy (SBRT) non-small cell lung cancer (NSCLC). This study aims to develop a deep learning-based segmentation approach accurately and efficiently delineate NSCLC using diagnostic PET-CT SBRT planning CT (pCT). Methods The PET was registered pCT the transform matrix from registering pCT. We proposed ...

Superior vena cava syndrome (SVCS) is characterized by a spectrum of clinical findings that result from the occlusion of the superior vena cava (SVC), usually caused by extracaval compression of the SVC by either a bronchogenic tumor or an enlarged mediastinal lymph node. Most efforts at treatment for SVCS are palliative, and long-term survival for malignancy-related SVCS is very low. Therefore...

criteria used for stage III tumors. Including patients with multiple ipsilateral mediastinal nodes, or those with any contralateral metastases, will inevitably increase doses to critical normal organs. Were high doses to the esophagus a reason to exclude patients, or to use a fraction size of 5 Gy, or even to accept lower tumor doses, as has been reported recently [8]? Further progress in this ...

Dose calculation algorithms in radiation treatment planning systems (RTPSs) play a crucial role in stereotactic body radiation therapy (SBRT) in the lung with heterogeneous media. This study investigated the performance and accuracy of dose calculation for three algorithms: analytical anisotropic algorithm (AAA), pencil beam convolution (PBC) and Acuros XB (AXB) in Eclipse (Varian Medical Syste...