Systems and methods for treatment positioning

A method for treatment positioning implemented on a system, the system comprising:

• a treatment component for treating a target of a subject, the treatment component including a radiation source that has a radiation isocenter;
• an imaging component;
• and
• a couch being movable between the treatment component and the imaging component along a reference axis, the couch including a positioning line that has a positioning feature, the positioning feature having a plurality of feature values, each feature value corresponding to a unique cross section of the couch, the unique cross section being at an oblique angle with the reference axis, the method comprising:
• acquiring, using the radiation source of the treatment component, at least one first image relating to the subject and the positioning line, the subject being located at a set-up position with respect to the treatment component during the acquisition of the at least one first image;
• acquiring, using the imaging component, at least one second image relating to the subject and the positioning line, the subject being located at an imaging position with respect to the imaging component during the acquisition of the at least one second image;
• determining, based on the at least one second image, a treatment isocenter of the target;
• and
• determining, based on the at least one first image, the at least one second image, and the positioning line, a treatment position of the subject at which a treatment session is delivered by the treatment component to the target of the subject, wherein the treatment isocenter of the target aligns with the radiation isocenter when the subject is located at the treatment position.

A non-transitory computer readable medium, comprising at least one set of instructions for treatment positioning in a system, the system comprising a treatment component for treating a target of a subject, the treatment component including a radiation source that has a radiation isocenter;

• an imaging component;
• and a couch being movable between the treatment component and the imaging component along a reference axis, the couch including a positioning line that has a positioning feature, the positioning feature having a plurality of feature values, each feature value corresponding to a unique cross section of the couch, the unique cross section being at an oblique angle with the reference axis, wherein
• when executed by one or more processors of the system, the at least one set of instructions causes the system to perform a method comprising:
• acquiring, using the radiation source of the treatment component, at least one first image relating to the subject and the positioning line, the subject being located at a set-up position with respect to the treatment component during the acquisition of the at least one first image;
• acquiring, using the imaging component, at least one second image relating to the subject and the positioning line, the subject being located at an imaging position with respect to the imaging component during the acquisition of the at least one second image;
• determining, based on the at least one second image, a treatment isocenter of the target;
• and
• determining, based on the at least one first image, the at least one second image, and the positioning line, a treatment position of the subject at which a treatment session is delivered by the treatment component to the target of the subject, wherein the treatment isocenter of the target aligns with the radiation isocenter when the subject is located at the treatment position.