A system for medical imaging comprising: an image sensor configured to generate image data, wherein the image sensor is a camera; an imaging apparatus including: a first PET scanner, a second PET scanner, and a driving device; and a computing device including: a controller configured to determine a first scanning location and a second scanning location based on the generated image data by the image sensor, and a processor, wherein, the driving device is configured to 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 are configured to obtain first scanning data and second scanning data, respectively, and the processor is configured to 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. an image sensor configured to generate image data, wherein the image sensor is a camera; an imaging apparatus including: a first PET scanner, a second PET scanner, and a driving device; and a computing device including: a controller configured to determine a first scanning location and a second scanning location based on the generated image data by the image sensor, and a processor, wherein, the driving device is configured to 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 are configured to obtain first scanning data and second scanning data, respectively, and the processor is configured to 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. a first PET scanner, a second PET scanner, and a driving device; and a computing device including: a controller configured to determine a first scanning location and a second scanning location based on the generated image data by the image sensor, and a processor, wherein, the driving device is configured to 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 are configured to obtain first scanning data and second scanning data, respectively, and the processor is configured to 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. a controller configured to determine a first scanning location and a second scanning location based on the generated image data by the image sensor, and a processor, wherein, the driving device is configured to 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 are configured to obtain first scanning data and second scanning data, respectively, and the processor is configured to 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.