title: Further development and clinical evaluation of the expanding aperture annular array system.
mesh_terms: D004582:Electronics, Medical; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007668:Kidney; D008099:Liver; D013154:Spleen; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation* / Q000379:methods; D014599:Uterus