
Scientists Can Now 3D Print Tissues Directly Inside the Body—No Surgery Needed
A new bioprinter uses ultrasound to non-invasively 3D print tissues, biosensors, and medication depots deep in the body.

This month, a team from the California Institute of Technology unveiled a system to 3D print tissues inside the body—no surgery needed. Dubbed deep tissue in vivo sound printing (DISP), the system uses an injectable bioink that’s liquid at body temperature but solidifies into structures when blasted with ultrasound. A monitoring molecule, also sensitive to ultrasound, tracks tissue printing in real time. Excess bioink is safely broken down by the body