Subject positioning systems and methods

A method for positioning a subject, implemented on a computing device having one or more processors and one or more storage devices, the method comprising:

• obtaining, using an imaging device, target information of at least part of a subject when the subject is located at a preset position, the target information including at least a set of target position data of the at least part of the subject;
• generating, based on the target information, a virtual representation of the at least part of the subject;
• comparing the virtual representation of the at least part of the subject and the at least part of the subject located at each of one or more candidate positions, respectively;
• and
• determining a target position of the subject from the one or more candidate positions based on the comparison.

A system for positioning a subject, comprising:

• at least one storage device including a set of instructions or programs;
• and
• at least one processor configured to communicate with the at least one storage device, wherein when executing the set of instructions or programs, the at least one processor is configured to cause the system to perform operations including:
• obtaining first information of at least part of a subject when the subject is located at a preset position, the first information including at least a first set of position data of the at least part of the subject;
• determining, based on the first information, a first position of each of one or more feature points located on the at least part of the subject;
• obtaining, using an imaging device, second information of the at least part of the subject when the subject is located at a candidate position, the second information including at least a second set of position data of the at least part of the subject;
• determining, based on the second information, a second position of each of the one or more feature points;
• for each feature point of the one or more feature points, determining a first distance between the first position and the second position;
• and
• determining, based at least in part on the one or more first distances, a target position of the subject.

A system for positioning a subject, comprising:

• at least one storage device including a set of instructions or programs;
• and
• at least one processor configured to communicate with the at least one storage device, wherein when executing the set of instructions or programs, the at least one processor is configured to cause the system to perform operations including:
• obtaining, using an imaging device, target information of at least part of a subject when the subject is located at a preset position, the target information including at least a set of target position data of the at least part of the subject;
• generating, based on the target information, a virtual representation of the at least part of the subject;
• comparing the virtual representation of the at least part of the subject and the at least part of the subject located at each of one or more candidate positions, respectively;
• and
• determining a target position of the subject from the one or more candidate positions based on the comparison.

A radiotherapy system, comprising:

• a radiation assembly, configured to emit radiation beam;
• a table, configured to support a subject;
• a holographic projection device, configured to scan a target area, the target area including at least part of the subject;
• and
• a processor, configured to control the radiotherapy system, wherein when executing a set of instructions or programs, the processor is configured to cause the radiotherapy system to perform operations including:
• controlling the holographic projection device to scan the subject to obtain target information of the subject, the target information including at least a target set of position data of the at least part of the subject.