0 a tall metal frame that supports heavy machines such as cranes, railway signals, or other equipment --
For a prosthesis on the left side, the gantry angles are approximately 30, 150, and 270 degrees.
The point of intersection between the gantry axis of rotation and the beam is called the "isocenter".
A common arrangement of five beams, each separated by equal gantry angle, was adopted.
The couch was moved 500 mm into the gantry and the offset from the marker recorded: this was found to be <1 mm.
The gantries themselves are more imposing structures than linear accelerators and can enclose patients as much as helical tomotherapy equipment.
One other difficulty was air movement above the water and mechanical vibration through the table structure, probe mount and gantry.
However, by law the gantry can only complete one 360° rotation in a maximum of 1 minute, this therefore means that image acquisition is slow.
Therefore, in our opinion, the problem of the controller design is for a gantry crane not closed.
