Congenital scoliosis and urinary tract abnormalities: are intravenous pyelograms necessary?

One hundred patients with a diagnosis of congenital scoliosis were reviewed with regard to their urologic history, chemistries, and excretory urography. A 40% incidence of urologic abnormality was found in these asymptomatic patients. Twenty-five additional patients were evaluated by excretory urography and ultrasonography. Of six patients identified by ultrasonography as having abnormalities five had results confirmed by excretory urography. Urologic evaluation of all patients with congenital scoliosis is recommended; however, diagnostic ultrasonographic evaluations of the urinary tract have proven to be an acceptable alternative as an initial screening modality.

Diffraction-limited single-longitudinal-mode multiple-prism flashlamp-pumped dye laser oscillator: linewidth analysis and injection of amplifier system.

In this paper, we present results of a study on a compact multiple-prism Littrow flashlamp-pumped dye laser oscillator. Single longitudinal mode at a linewidth

Single-mode flashlamp-pumped dye laser oscillators.

In this paper, we report single-longitudinal-mode operation in a flashlamp-pumped dye laser incorporating a multiple-prism beam expander with the grating either in a Littrow or grazing-incidence configuration. Linewidths in the 260-MHz range were obtained, using rhodamine 590 dye at output energies exceeding 60 mJ. Pulse duration for the multiple-prism Littrow dye laser oscillator was approximately 200 ns (FWHM).