Results: 11

On the use of radiobiological-based optimization functions in radiotherapy treatment planning for prostate and head and neck cases on Monaco and Eclipse TPS

INTRODUCTION Radiobiological-based optimization functions for radiotherapy treatment planning involve dose-volume effects that could allow greater versatility when shaping dose distributions and DVHs than traditional dose volume (DV) criteria. Two of the most commercially available TPS (Monaco and Eclips...

Uso de imágenes KV CBCT del acelerador lineal Halcyon para la planificación de tratamientos de metástasis óseas con intensión paliativa

Las nuevas tecnologías para el tratamiento del cáncer con radiación ionizante tienen especial interés en mejorar la calidad de las imágenes para el posicionamiento adecuado del paciente con sistemas de radioterapia guiada por imagen IGRT. El sistema Halcyon cuenta con imágenes de tomografía comput...

Leak and Scattering Assessment by Optically Stimulated Luminescence Dosimetry in a Helical Linear Accelerator

Radiation absorbed doses to organs outside the radiation therapy treatment beam can be significant and therefore of clinical interest. Two sets of out-of-beam measurements were performed measuring the leak dose and the scattered dose, at 5 points within the accelerator components (accelerator tube and co...

Radiation therapy with elective lymph node irradiation for breast cancer: dosimetric study and impact on cardiovascular risk and second neoplasms

SUMMARY OBJECTIVE: The aim of this study was to perform dosimetric analysis of radiotherapy (RT) plans with or without elective nodal irradiation (ENI) and estimate whether the increase in mean doses (MDs) in the heart and lungs with ENI may lead to late side effects that may surpass the benefits of tr...

Lattice radiation therapy - its concept and impact in the immunomodulation cancer treatment era

SUMMARY Voluminous tumors represent a challenge in radiation oncology, particularly when surgical resection is not possible. Lattice radiotherapy (LTR) is a technique that may provide equivalent or superior clinical response in the management of large tumors while limiting toxicity to adjacent normal tis...

Comparación de la dosis estimada en Recto y Vejiga con planificación de Braquiterapia 3D vs 2D

Oncología (Guayaquil); 29 (1), 2019
Introducción: En el tratamiento del Cáncer Cervico Uterino la braquiterapia (BQT) con planificación tridimensional (3D) está altamente extendida, aunque por su costo otros centros utilizan BQT con planificación bidimensional (2D). Es importante establecer si el beneficio que se obtiene con BQT en 3 ...

Comportamiento dosimétrico de un sistema de planificación mediante curvas de calibración de densidades electrónicas relativas

En esta investigación se planteó como objetivo la verificación del comportamiento dosimétrico del Sistema de Planificación de Tratamiento (TPS) de Radioterapia mediante las curvas de calibración de Densidades Electrónicas Relativas (DER). Este estudio se realizó en el Hospital de la Sociedad de L...

Implantation of a biodegradable rectum balloon implant: Tips, Tricks and Pitfalls

Int. braz. j. urol; 43 (6), 2017
ABSTRACT Introduction: A rectum balloon implant (RBI) is a new device to spare rectal structures during prostate cancer radiotherapy. The theoretical advantages of a RBI are to reduce the high radiation dose to the anterior rectum wall, the possibility of a post-implant correction, and their predetermin...

Emerging radiotherapy technology in a developing country: A single Brazilian institution assessment of stereotactic body radiotherapy application

Summary Objective: To provide a quantitative profile of the indications and use of stereotactic body radiotherapy (SBRT) in a developing country oncology-based institution. In addition, to describe the patients' and treatment characteristics, and to provide a temporal analysis. Method: SBRT patients tr...