System and method for diagnosis and treatment

A method implemented on a computing device having at least one processor, at least one computer-readable storage medium, and a communication port connected to a medical device including a couch, the method comprising:

• determining a displacement measurement of the couch in a first coordinate direction between a first working position of the couch and a second working position of the couch by using at least one measuring device;
• determining a deformation measurement of the couch at a reference point based on the displacement measurement of the couch in the first coordinate direction, the deformation measurement of the couch corresponding to the second working position;
• and
• causing an adjustment of the second working position of the couch based on the deformation measurement of the couch in the first coordinate direction.

A system fora medical device, comprising:

• a computed tomography (CT) device located at a first position;
• a radio therapy (RT) device located at a second position, the RT device being coupled to the CT device, the CT device and the RT device sharing a same bore;
• a couch including a movement assembly configured to transfer the couch between the first position and the second position through the bore;
• a rangefinder associated with the couch, the rangefinder being configured to acquire data relating to a position of a reference point at the couch at the second position;
• at least one processor;
• and
• executable instructions, the executable instructions being executed by the at least one processor, causing the system to determine, based on the data relating to the position of the reference point at the couch at the second position and data relating to a position of the reference point at the couch at the first position, a deformation measurement of the couch at the reference point at the second position relative to the first position,
• wherein the CT device is configured to acquire the data relating to the position of the reference point at the couch at the first position.