Estimating the irradiance of a perturbed surface under an extended source.

This paper presents a method for evaluating the irradiance of a single freeform surface deviation under extended source illumination. The method takes advantage of a well-known concept, the pinhole image. First, the irradiance of the perturbed freeform surface under point source illumination is computed.

Idiopathic subglottic stenosis in a young female patient.

A previously healthy 30-year-old woman presented with 3 years of progressive shortness of breath and audible wheezing. One year prior to presentation, she developed a chronic non-productive cough. Pulmonary function testing revealed flattened inspiratory and expiratory peaks, characteristic of an extrathoracic fixed tracheal obstruction.

Verification of cascade optical coherence tomography for freeform optics form metrology.

Freeform optical components enable dramatic advances for optical systems in both performance and packaging. Surface form metrology of manufactured freeform optics remains a challenge and an active area of research. Towards addressing this challenge, we previously reported on a novel architecture, cascade optical coherence tomography (C-OCT), which was validated for its ability of high-precision sag measurement at a given point.

Cascade optical coherence tomography (C-OCT).

Significant advances for optical systems in terms of both performance and packaging are enabled by freeform optical components. Yet, surface form metrology for freeform optics remains a challenge. We developed and investigated a point-cloud cascade optical coherence tomography (C-OCT) technique to address this metrology challenge.

Complications of Lateral Epicondylar Release.

Reported complication rates are low for lateral epicondylitis management, but the anatomic complexity of the elbow allows for possible catastrophic complication. This review documents complications associated with lateral epicondylar release: 67 studies reporting outcomes of lateral epicondylar release with open, percutaneous, or arthroscopic methods were reviewed and 6 case reports on specific complications associated with the procedure are included. Overall complication rate was 3.

Shoulder instability in the setting of bipolar (glenoid and humeral head) bone loss: the glenoid track concept.

Background: An assortment of variables has been used in predicting anterior shoulder instability resulting from pathologic engagement of Hill-Sachs lesions on the glenoid. The glenoid track is a unique biomechanical model that relates both Hill-Sachs and bony Bankart lesions to predict shoulder engagement. We examined the glenoid track concept to determine if it provides a model that unifies glenoid rim and humeral head bone loss in predicting engagement.