hold still
Be the patient. Your camera stands in for an MRI scanner, which measures one line every half second, so every line comes from wherever you are at that moment.
Hold still
In a scanner you are asked to keep still, and here is why. The scanner measures k‑space, the image's frequencies, one line every half second, and every line comes from wherever you are at that moment. Be the patient: your camera stands in for the scanner. The picture stays on this device; nothing is recorded or sent.
Use the camera to be the patient, or scan the cat.