A method and system for imaging a volume of tissue and defining a tissue boundary comprising: receiving a baseline dataset representative of a first set of signals interacting with a medium receiving a reconstruction dataset representative of a second set of signals interacting with the medium and the volume of tissue present in the medium determining a set of direct emitter-receiver pairs, each defining a direct trajectory that does not pass through the volume of tissue from the set of direct emitter-receiver pairs, determining a set of tangential emitter-receiver pairs, each defining a bounding vector comprising a tangent point along the tissue boundary determining a set of interior pixels, of the reconstruction dataset, characterized by a set of pixel locations within the tissue boundary and reconstructing pixels of the set of interior pixels, thereby transforming the baseline and the reconstruction datasets into an image rendering of the volume of tissue.
