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"Mid-treatment adaptive planning during thoracic radiation using 68 Ven" by Nicholas Bucknell, Nicholas Hardcastle et al.

Four-Dimensional Gallium 68 Ventilation-Perfusion Positron Emission Tomography (68Ga-4D-V/Q PET/CT) allows for dynamic imaging of lung function. To date there has been no assessment of the feasibility of adapting radiation therapy plans to changes in lung function imaged at mid-treatment function using 68Ga-4D-V/Q PET/CT. This study assessed the potential reductions of dose to the functional lung when radiation therapy plans were adapted to avoid functional lung at the mid-treatment timepoint using volumetric arc radiotherapy (VMAT). Methods: A prospective clinical trial (U1111-1138–4421) was performed in patients undergoing conventionally fractionated radiation therapy for non-small cell lung cancer (NSCLC). A 68Ga-4D-V/Q PET/CT was acquired at baseline and in the 4th week of treatment. Functional lung target volumes using the ventilated and perfused lung were created. Baseline functional volumes were compared to the week 4 V/Q functional volumes to describe the change in function o ....

Dimensional Gallium , Perfusion Positron Emission Tomography , 4d Imaging , Adaptive Radiotherapy , Functional Imaging , Lung Cancer , Positron Emission Tomography , Volumetric Arc Therapy ,