Sonographic equipment for breast imaging has continued to improve, and the role of breast
sonography has evolved to that of an indispensable adjunct to mammography. Breast …

… All four of the full-field digital mammography systems are based on the absorption of x
rays by a phosphor material with subsequent conversion of the absorbed energy to electron!c …

Breast ultrasound (US) was performed, with either an automated or a hand-held unit or both,
on 1,212 patients. Of 612 asymptomatic patients, 118 (19.3%) had solitary cysts; ten (1.6%), …

A series of in vitro experiments evaluated the effects of intervening tissue, B-mode processing
algorithms, stone chemical composition, stone size, and reverberation artifacts on the …

… C. Output as a function of beam quality For quality assurance, acceptance testing, and
regulatory needs, diagnostic exposure meters must measure output at a variety ofbeam energies. …

Three experiments with a variety of transducers and scanning parameters were designed to
investigate if renal stones could be detected with greater certainty by using particular …

To assess the need for quality control when measuring peak velocities with Doppler
ultrasonography, 17 duplex Doppler instruments from six manufacturers were compared by using a …

Sonographically guided fine-needle biopsy procedures are hampered by poor visibility of
the needle tip. This study was performed to evaluate a new system for placing needles under …

The positive predictive value of mammography is between 20% and 25% for clustered
microcalcifications. For very early cancers there is often a lack of concordance between …

To determine the variability of pulsed Doppler peak velocity measurements, four radiologists
with differing experience were tested using a calibrated flow phantom. Two ultrasound units…