Blind Reflectometry

Clinical application of acoustic reflectometry in predicting the difficult airway.

UNLABELLED Acoustic reflectometry, a noninvasive test that produces a length versus cross-sectional area map of the airway, has been used to identify difficult-to-tracheally intubate patients in a small retrospective case-control study. A critical airway volume of 40.2 mL separated those patients whose tracheas were impossible to intubate from those who were easily intubated. To determine if th...

Measurement of urethral closure function in women with stress urinary incontinence.

PURPOSE We assessed the use of urethral pressure reflectometry in detecting pressure increases in the female urethra and compared the usefulness of urethral pressure reflectometry vs urethral pressure profilometry in a pharmacodynamic intervention study. MATERIALS AND METHODS In this randomized, double-blind, placebo controlled, crossover study 17 women with stress urinary incontinence or mix...

Low Power Analog Correlator for Spread Spectrum Time Domain Reflectometry

Analog correlation is an important analog signal processing function. A new analog correlator circuit for implementing Spread Spectrum Time Domain Reflectometry (SSTDR) technique is proposed. SSTDR technique, makes locating intermittent faults possible, by continuously testing live wiring networks. The proposed correlator circuit is more linear by almost an order of magnitude and consumes half ...

Skin cancer detection by spectroscopic oblique-incidence reflectometry: classification and physiological origins.

Data obtained from 102 skin lesions in vivo by spectroscopic oblique-incidence reflectometry were analyzed. The participating physicians initially divided the skin lesions into two visually distinguishable groups based on the lesions' melanocytic conditions. Group 1 consisted of the following two cancerous and benign subgroups: (1) basal cell carcinomas and squamous cell carcinomas and (2) beni...

Spaceborne Receiver Design for Scatterometric GNSS Reflectometry