Description
Department of Biomedical Engineering, University of Basel
Introduction
Arteriovenous malformations (AVMs) are abnormal, snarled tangles of blood vessels that cause multiple irregular connections between the arteries and veins. In order to correctly locate an AVM, typically, a digital subtraction angiography (DSA) is carried out. To use the DSA for target definition an accurate image registration between CT and DSA is required. Carrying out a...
Purpose: To evaluate the dosimetric effect of the residual breathing motion during gating for the first patient treated with MRI guided cardiac radiosurgery.
Methods: A patient with ventricular tachycardia was treated in one fraction with a dose of 25 Gy to the 85%-isodose line to the planning target volume (PTV). The target volume (TV) was defined according to the cardiologists...
Aims
The precise treatment of tumor lesions in the abdomen is challenging due to inter- and intra-fractional anatomy variations. With MR-guided radiotherapy, daily plan adaption can be performed. Here we investigated the benefit of adaption in terms of tumor coverage and organ at risk (OAR) sparing.
Methods
SBRT radiotherapy treatment plans, created with IMRT and treated with a gated...
Introduction
4D imaging is an important tool for respiratory motion quantification and, among others, finds its application in radiotherapy treatment planning. To date, most 4D imaging techniques rely on prospective or retrospective stacking of partial image data and binning [1]. The result is a respiratory-correlated 4D image representing a mean breathing cycle. However, such binning...
Introduction
Respiratory motion poses great challenges in pencil beam scanned (PBS) proton therapy of mobile targets. In a recent study, we presented the potential of tumour tracking using a patient-specific motion model on simulated 4DCT(MRI) data sets [1]. A statistical motion model was used to estimate dense lung motion information from 2D abdominal ultrasound (US). While this study...
