The present disclosure discloses a system for medical imaging. The system may include an imaging apparatus, wherein the imaging apparatus may include a first PET scanner, a second PET scanner, and a driving device. The system may further include a computing device, wherein the computing device may include a controller and a processor. The controller may determine a first scanning location and a second scanning location. The driving device may drive the first PET scanner and the second PET scanner to move to the first scanning location and the second scanning location, respectively. The first PET scanner and the second PET scanner may obtain first scanning data and second scanning data, respectively. The processor may generate a first image of a first scanning area corresponding to the first scanning location and a second image of a second scanning area corresponding to the second scanning location.
