Abstract: The speed of sound data corresponding to transmission of ultrasound through a cancerous lesion is different than the speed of sound data corresponding to transmission of ultrasound through a benign lesion. The system can assign a coloration to a speed of sound image according to the speed of sound through the tissue as obtained from quantitative transmission ultrasound. The shape indicative of a lesion can be identified through the reflection data with the type of lesion identifiable by the coloration from the speed of sound data.

Abstract: The speed of sound data corresponding to transmission of ultrasound through a cancerous lesion is different than the speed of sound data corresponding to transmission of ultrasound through a benign lesion. The system can assign a coloration to a speed of sound image according to the speed of sound through the tissue as obtained from quantitative transmission ultrasound. The shape indicative of a lesion can be identified through the reflection data with the type of lesion identifiable by the coloration from the speed of sound data.

Abstract: A method for quantitative assessment of breast density can include separating breast voxels and exterior voxels from an image of a patient's breast; and for the breast voxels identified in the image, identifying tissue having high speed value from other tissue. The estimated breast density can be calculated based on the percentage of non-skin breast voxels corresponding to fibroglandular tissue density within the breast.

Abstract: Methods and systems for imaging calcium in a subject are provided. In one aspect a method for imaging one or more micron-sized calcium deposits in a tissue of a subject can include delivering a transmission ultrasound wave field from a transmission transducer array to a body part of a subject, receiving transmission data from the transmission ultrasound wave field at a transmission receiver array, delivering a reflection ultrasound wave field from a reflection transducer array to the body part of the subject, receiving reflection data from the reflection ultrasound wave field at a reflection receiver array, generating speed of sound data from the transmission data, and refraction correcting the reflection data using the speed of sound data to generate a corrected reflection image showing a micron-sized calcium deposit image.