TY - GEN AU - Parks,S I AU - Linzer,M AU - Shawker,T H TI - Further development and clinical evaluation of the expanding aperture annular array system SN - 0161-7346 PY - 1980///0923 KW - Electronics, Medical KW - Evaluation Studies as Topic KW - Female KW - Humans KW - Kidney KW - Liver KW - Spleen KW - Transducers KW - Ultrasonics KW - instrumentation KW - Uterus N1 - Publication Type: Journal Article UR - https://doi.org/10.1177/016173467900100408 ER -