Fig. 1
From: Quantifying the reduction of respiratory motion by mechanical ventilation with MRI for radiotherapy
Overview of training and MRI acquisition sessions. Training 1 & 2 accustomed the volunteer to deep inspiration breath-holds (DIBH) with and without mechanical ventilation (Mech.vent.), regularized breathing (RB), prolonged breath-hold from inhalation (PIBH), and prolonged breath-hold from partial exhalation (PEBH). During MRI1 and MRI2, volunteers were scanned throughout FB and the various breathing control strategies. Imaging was either 4DMRI, 3DMRI or 3D cine-MRI (3D cine) as required