1. A process of forming an ultrasonographic image employing a silver halide emulsion layer containing photographic element comprising imagewise exposing the photographic element to ultrasonic radiation at an intensity and for a duration sufficient to alter the exposure response of the element to electromagnetic radiation, but below that which will produce a latent image in the absence of externally applied electromagnetic radiation, the ultrasonic energy applied to the photographic element being less than 100 watt-sec/cm.sup.2 ; exposing the element to electromagnetic radiation, thereby producing a latent image therein defined by the ultrasonic radiation exposure; and photographically processing the element to produce a visible image corresponding to the latent image.