What is the maximum possible movement of the tumor, speeds, lung volume, etc?
The stroke is adjustable up to 25mm, using the Stroke dial in the software. The phantom motion depends on applied pressure waveform, in particular in the exhalation portion of the cycle. The system is open-loop where the applied pressure inflates the phantom and when rapidly reduced, the phantom exhales under the force of the elastic materials in the chestwall (virtual intercostal muscles). When the pressure in the lung volume is decreased slowly, the motion follows the (decreasing) applied pressure. The maximum applied pressure is set at the factoryfor a chestwall motion of approximately 1.5-2cm with the white rod in place. There is a simple adjustment in the pump box to customize this to your needs. The lung volume corresponds to size for a 5 feet, 9 inches (175 cm) tall, 162 lbs (73.5 kg) male. All of the RSD materials in the imagable volume of the phantom are equivalent to natural bone and soft tissues. The tumor/target speed travels the full stroke in/out (i.e. 50mm = twice the 25
