MR imaging of the breast with rotating delivery of excitation off resonance: clinical experience with pathologic correlation.

An investigative study was undertaken to determine the potential for a new magnetic resonance (MR) imaging technique, RODEO (rotating delivery of excitation off resonance), for use as a diagnostic imaging tool for the breast. The RODEO technique provides fat suppression with T1 weighting and is ideal for gadolinium-enhanced breast imaging. It is a short repetition time, steady-state sequence for high-resolution three-dimensional acquisitions and provides a clinically efficient imaging time of approximately 5 minutes for 128 sections.

Fat-suppressed three-dimensional MR imaging of the breast.

Rotating delivery of excitation off-resonance (RODEO) is a new magnetic resonance (MR) imaging pulse sequence that uses a jump return sine excitation on fat resonance to produce fat-suppressed, T1-weighted images. New three-dimensional MR imaging techniques were used to examine 57 women with abnormalities suspicious for breast cancer. MR imaging findings were compared with those of mammography in all cases and with those of other imaging techniques when appropriate.

Magnetic resonance imaging of the breast.

The diagnosis and treatment of breast cancer is dependent upon accurate depiction of the disease by diagnostic imaging. In a number of clinical situations, conventional breast imaging does not adequately address these diagnostic needs. New magnetic resonance imaging (MRI) methods developed specifically for breast diagnosis may provide the additional capability needed to fill the gap between clinical needs and the information obtained by conventional breast imaging methods.

Blood lead and zinc protoporphyrin in lead industry workers.

A retrospective study was performed by evaluating the time course changes in blood lead and zinc protoporphyrin concentrations in 240 industrial lead workers. The data indicate that there is a considerable difference in rate of change and plateau state for each of the two parameters. The difference in time course in these parameters indicates that both should be monitored in workers in order to estimate the accumulation of lead and the metabolic response to the body burden.