Abstract: A mechanism for determining the location of a mid-sagittal axis with respect to a medical image depicting a heart. The image is processed to identify a first portion representing a portion of the spine and bounding box that encloses a representation of an inner thorax of the subject. An inner thorax is a portion of the thorax that is contained between the ribcage and the spine or skin, but does not contain any calcified tissue such as bone. The mid-sagittal axis is determined to intersect the portion of the spine and runs perpendicular to a side of the bounding box nearest the portion of the spine.

Abstract: A mechanism for defining locations for any labels of a ultrasound image. One or more label zones are identified by processing the ultrasound image. Each label zone is a continuous region whose pixels have intensity values that vary by less than a predetermined amount. Each label is positioned responsive to the location of the identified label zones.