Introduction: In external beam radiotherapy each effort is done to deliver 3D dose distribution onto the tumor volume uniformly, while minimizing the dose to healthy organs at the same time. Radiation treatment of tumors located at thorax region such as lung and liver has a challenging issue during target localization since these tumors move mainly due to respiration. There are...

Brain metastases represent the first cause of malignant brain tumor. Without radiation therapy, prognosis was poor with fast neurological deterioration, and a median overall survival of one month. Nowadays, therapeutic options depend on brain metastases presentation, extra brain disease, performance status and estimated prognostic (DS GPA). Therefore, for oligometastatic brain patients with a b...

Introduction: The aim of this study was to determine the accuracy of two different immobilization methods in patient positioning in cranial radiotherapy. The six-dimensional (6D) target localization accuracy of using a dedicated stereotactic mask was compared with that of a conventional head mask by the ExacTrac system. Material and Methods: ...

The N-localizer enjoys widespread use in image-guided stereotactic neurosurgery and radiosurgery. This paper derives the mathematical equations that are used with the N-localizer and provides analogies and explanations in order to promote an intuitive understanding of the mathematical principles. Categories: Medical Physics, Radiation Oncology, Neurosurgery

Malignant recurrence always presents as a unique therapeutic challenge, more so in the setting of prior radiation. Where re-irradiation is considered, striking delicate balance between avoiding normal tissue toxicity while still delivering sufficient doses to ideal. For this purpose, with its capacity deliver ablative tumor target highly conformal manner, stereotactic body radiation therapy (SB...

Stereotactic body radiation therapy (SBRT) is an effective and well-tolerated treatment for medically inoperable patients with early stage NSCLC. SBRT a noninvasive involving the delivery of ablative doses high precision in course few treatments. Relative to conventionally fractionated radiation, achieves superior local control survival. use has increased dramatically past 15 years currently co...

background: radiosurgery is a focal brain irradiation technique that delivers, usually in a single session, high dose of ionizing radiation. the presence of lateral electronic disequilibrium and steep dose gradients in small fields demands special attention to the selection of a suitable detector with respect to its size, composition and response. materials and methods : small circular fields w...

Curing Operable Stage I Non-Small Cell Lung Cancer With Stereotactic Ablative Body Radiotherapy: The Force Awakens SHANKAR SIVA, DAVID BALL Division of Radiation Oncology and Cancer Imaging, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia Disclosures of potential conflicts...

Key Points  Stereotactic radiosurgery is the delivery of a highly-focused beam of radiation to a target  It uses very high doses, but is highly conformal, so surrounding tissue toxicity is low  Tumours treated successfully include brain, intra-nasal, osteosarcoma, bladder, prostate, urethra, heart-base, liver  Treatments are typically delivered in 1-3 fractions with obvious benefits to the ...

This case report details a clinical trial's first recruited liver cancer patient who underwent a course of stereotactic body radiation therapy treatment utilising audiovisual biofeedback breathing guidance. Breathing motion results for both abdominal wall motion and tumour motion are included. Patient 1 demonstrated improved breathing motion regularity with audiovisual biofeedback. A training e...