Models of Whole Body Linac-MR Designs Currently Under Construction
Transverse (Perpendicular) Configuration
Longitudinal (Parallel) Configuration
First Images from Head Prototype
Left: MR axial image without 6 MV linac
Right:MR axial image during 6 MV irradiation of object imaged. Linac is without flattening filter and radiation was monitored during imaging.
Axial slices were obtained with a raw gradient echo sequence, flip angle =90o, TE=14.0 ms, TR=300 ms, Bandwidth = 10 kHz, matrix size=128x128, No-Averages=1, slice thickness=7 mm, FOV=100 mm x 100 mm. The phantom consists of an acrylic rectangular cube 15.95 x 15.95 x 25.4 mm (0.628 x 0.628 x 1.0 inch) with holes of diameter 2.52 mm, 3.45 mm and 4.78 mm (0.099 inch, 0.136 inch, 0.188 inch) drilled parallel to the length of the rectangular cube. The cube is immersed in a 10 mM solution of CuSO4 within a plastic container 22.5 mm inner diameter.