Radiation Induced Lung Injury (RILI) Clinical Trial
Official title:
Hyperpolarized 129Xe Magnetic Resonance Imaging for Evaluation of Radiation-Induced Lung Injury in Subjects Undergoing Thoracic Irradiation
The purpose of this work is to perform hyperpolarized (HP) 129Xe MRI in human subjects undergoing thoracic radiation therapy (RT), both before, during and following RT. HP 129Xe MR images will be analysed to provide maps of ventilation (V), perfusion (Q), apparent diffusion coefficient (ADC) and gas exchange. These results will be combined to yield a new measure of RILI, (i.e. dose volume histograms; DVHV/Q) and compared with conventional dose volume histograms (DVH), pulmonary function tests (PFTs), quality of life (QOL) questionnaire and CT measurements for assessment of RILI at each time point. The aim is to development a novel method for early and more sensitive method of detecting RILI before irreversible lung damage happens.
Briefly, at the beginning of an approximate three hour study visit, the qualified investigator (QI) / delegate will explain the study procedure to the participants and the participants will have an opportunity to ask questions regarding the study procedure. Following the explanation of the study, written informed consent will be collected. During the study visit, participants will undergo: 1) brief medical history and clinical examination, 2) full pulmonary function tests, 3) proton MRI, 4) HP 129Xe MRI. Qualified research team members will perform a clinical examination on the participant to record their vital statistics like age, gender, height, weight, heart rate, respiratory rate, oral temperature and blood pressure. The QI/delegate, during a brief conversation with the participant, will collect relevant medical history from the participant to make sure the participant meets all the inclusion/exclusion criteria for the study. The QI will also make sure that the participant understands the study procedure and is willing to participate in the study. At each study visit at SickKids, the QI or delegate will also administer the QOL questionnaire to the participant. Based on the clinical examination results, medical history and the pulmonary function test results, the QI/delegate will determine if all the inclusion/exclusion criteria are met to proceed with the MRI part of the study visit. ;