Robust beam width estimation with sub-pixel resolution in uncontrolled imaging conditions.

Estimations of laser beam widths can yield vastly different results depending on the used beam width measurement method and the measurement conditions. We expand upon an imaging analysis method, proposed in the field of laser eye safety, to determine a laser's beam width based on the ratio between encircled energy and diameter. We show this method to be highly valuable when determining beam widths in noisy imaging conditions and in the presence of background illumination.

Low Prevalence of Severe Underlying Pathology in Children With Recurrent Respiratory Tract Infections.

No underlying pathology could be detected in 64% of 208 children presenting with recurrent respiratory tract infections in general pediatric practice. Asthma/preschool wheezing and adenoid hypertrophy were commonly diagnosed. None of the children had a severe primary immunodeficiency or severe pulmonary illness such as cystic fibrosis.