Target Delineation and Organ-at-Risk (OAR): Considerations in SRS/SBRT
A practical overview of target delineation and organ-at-risk considerations in SRS/SBRT. Topics include the role of the advanced practitioner, imaging selection, patient positioning for advanced treatments, and delineation techniques. Practical aspects of real-time contouring, complex clinical decision-making, and on-treatment imaging will be discussed.
Imaging Work-up of Radiation Necrosis and Tumour Progression in Patients with Brain Metastases
The presentation will provide an overview of imaging approaches to differentiate radiation necrosis from tumour progression in patients with brain metastases.
Imaging Based Response Assessment of Spinal Metastasis following SBRT
The objective of this presentation is to review the following with regards to imaging based response assessment following spine SBRT: The need and unique challenges Review the current state Developing and future solutions
PseudoPatient Technology – A Personalized Pretreatment Verification in SRS – Part 2
This webinar will introduce PseudoPatient3D, an anatomically accurate replica of the patient’s head, that enables physicians to verify in 3D the accuracy of the planned treatment or apply necessary adaptations before implementing it to the patient. The overall treatment chain from imaging to dose delivery on Pseudopatient3D is evaluated through an End-to-End QA methodology and 3D dose […]
PseudoPatient Technology – A Personalized Pretreatment Verification in SRS
This webinar will introduce PseudoPatient, an anatomically accurate replica of the patient’s head, that enables physicians to verify the accuracy of the planned treatment or apply necessary adaptations before implementing it to the patient. Particularly highlights the benefits of using PseudoPatient in cases of hypo fractionated SRS.A personalized patient approach that offers quality assurance with emphasis […]
Breaking Barriers with Sound: Current and Emerging Indications for MR-guided Focused Ultrasound
Focused ultrasound (FUS) is a disruptive medical technology, and its implementation in the clinic represents the culmination of decades of research. With the ability to non-invasively and precisely intervene in key structures, FUS offers a new means of interacting with dysfunctional brain circuits. The last decade has seen a dramatic expansion of indications for and experience with FUS in […]
Technology in Radiosurgery
Accuracy of Gamma Knife Surgery
The accuracy of frame-based and frameless Gamma Knife surgery (GKS) will be reviewed in detail. It includes small field dose measurement and plan verification with film dosimetry. The accuracy of image co-registration using Icon CBCT and other images will be thoroughly assessed. The end-to-end test will show the overall accuracy of GKS.
AI-driven Treatment Planning and its Application in SBRT
Webinar overview:
Model-based Dose Calculation Algorithms for Stereotactic Radiosurgery Treatment Planning
Historically, corrections based on dose-calculation algorithms have been used in stereotactic radiosurgery application for reconstructing patient’s dose distributions. The limitations of these algorithms that led to the introduction of model-based dose calculation algorithms in radiosurgery will be presented.
MR-Guided Radiotherapy: a Game Changer or all Hype?
MR-guided radiotherapy promises to revolutionise radiotherapy delivery. These systems bring the obvious benefits of improved soft-tissue definition, and the ability to monitor anatomy with cineMRI during beam-on. However, the more fundamental innovation is the ability to deliver daily adaptive replanning while the patient is on the bed, allowing us to, for the first time, adapt […]
MR Imaging Techniques for SRS
Imaging for SRS can be more demanding compared to conventional diagnostic imaging. In SRS, high-quality imaging is crucial for the identification and contouring of both lesions and organs at risk. SRS requires high geometric accuracy in order to treat successfully and safely, delivering large doses of radiation with the characteristic steep dose gradient. Imaging can […]
Patient Immobilization for Stereotactic Treatment
Precise target localization is one of the crucial part of the stereotactic treatment. The way to achieve this accuracy changed from rigid fixation and complex immobilization devices to real time tracking and focusing on patient comfort and the speed of the treatment. In this webinar current approaches to patient immobilization for intracranial and extracranial stereotactic […]
MRI-based TRAMs for High Resolution Depiction of Tumor versus Treatment Effects
Our treatment response assessment maps (TRAMs) are calculated from standard T1-weighted MRI acquired at a delay post contrast injection. In the TRAMs (3D high resolution maps) active tumors are depicted blue while treatment effects (including pseudoprogression, radiation necrosis, post-surgical changes and more) are depicted red. The TRAMs are routinely used for clinical decision making and […]
How Small is Too Small? QA & QC for HyperArcTM SRS
Quality assurance for linear accelerator intracranial radiosurgery using the Varian HyperArcTMsystem will be discussed. Both mechanical and dosimetric QA will be reviewed, with particular emphasis on patient-specific dosimetry of targets as small as 3 mm. The experience at The University of Alabama at Birmingham will be presented.
Boron Neutron Capture Therapy: Current State and Future Perspectives
Boron neutron capture therapy (BNCT) is a unique alternative approach to malignant tumor radiotherapy that provides eradication power at the single tumor cell level within normal tissues holding curative potential for invasive cancers, including head and neck cancer, malignant melanoma, and multiform glioblastoma.
The Patient QA Problem in Radiosurgery: What Are the Most Recent Recipes in the Dosimetry Cookbook?
Considering the complexities of the dose delivery process in stereotactic radiosurgery, dosimetry verification of patient-specific treatments prior delivery is critical to the clinical outcome. Despite this, there are no single definitive detector or procedure recommended and an overview of the possible different approaches will be given in this presentation.
Differentiation of Radiation-Induced Changes and Tumor Progression After Intracranial Radiosurgery
A number of intracranial tumors demonstrate some degree of enlargement after stereotactic radiosurgery. It necessitates differentiation of their regrowth and various treatment-related effects. The diagnosis is frequently complicated by histopathological heterogeneity of the lesion with coexistent viable neoplasm and radiation-induced tissue changes. Several neuroimaging modalities, namely structural MRI, DWI, DTI, perfusion CT and MRI, single-voxel […]
Dose Differences According to Different Planning Philosophies
Common parameters quoted with clinical treatment often give an incomplete picture of the actual doses delivered to the radiosurgical target. Doses adopted from one centre to another can in reality be significantly different due to subtle variations in parameters such as target definition, normalisation, coverage, gradient and margins applied. In this webinar, the effect of […]
MR-Guided Adaptive Stereotactic Radiotherapy
Magnetic resonance imaging (MRI) offers the best anatomical information and it can be used for adaptive radiation therapy. In this webinar an overview of the key components to implement stereotactic magnetic resonance adaptive radiotherapy (SMART) will be discussed. Examples will be highlighted with the MRIdian system (ViewRayTM), which enables to perform continuous MRI during RT […]
SRS Physics – Imaging and QA
This 60 minute presentation covers Quality Assurance tests for radiosurgery, including the QA of image distortion, which potentially can represent the largest factor in treatment uncertainty.