Enhancing Zoom and Pan in Ultrasound Machines with a Multimodal Gaze-based Interface.

We present the first iteration of a user-centred design for integrating an eye gaze tracker with ultrasound (US) machine interfaces used in routine diagnostic sonography. The aim is to speed up the interaction of the sonographer with the machine, offer a more ergonomic solution while minimizing the cognitive load and maintaining the produced image quality. In this iteration, we target pan and zoom functions. Field studies and observations have led to two design alternatives. A feasibility study of two design approaches determined from field studies is done using a functional prototype. Results from six sonographers provided evidence for the potential of a multimodal gaze-based interface for US machines. Results from the feasibility study have also led to a second design iteration that combines the advantages of both gaze-based designs.