Phase mask optimization is one of the critical steps in designing a wavefront coding system to extend depth field (DoF). As classical phase mask, cubic was taken as an example. An improved particle swarm (PSO) algorithm applied calculate parameters by introducing modulation transfer function criterion and threshold constraint. The quality subsequent image restoration guaranteed on premise exten...

The present study examines the reliability of masked high-frequency bone-conduction threshold measurements in 95 normal-hearing subjects. High-frequency pure-tone air-and bone-conduction thresholds were measured with a dedicated laboratory high-frequency auditory evaluation system using matched, modified Koss Pro/4X Plus earphones, and the Pracitronic KH 70/5 bone vibrator. A 400-Hz wide band m...

Water resources are an important component of ecosystem services. During long periods cloudiness and precipitation, when a ground-based sample is not available, the water bodies detected from satellite SAR (synthetic-aperture radar) data using threshold methods (e.g., Otsu Kittler–Illingworth). However, such do enable to obtain correct value for backscattering coefficient (?0) relatively small ...

the laryngeal mask airway (lma) is an important addition to the anesthetist's equipments. however, its usage may involve some complications. we have encountered an unusual and potentially serious complication using this equipment. a 45-year old man underwent cataract surgery under general anesthesia. after the induction of anesthesia, a size 4 of the reusable classic lma was inserted without an...

the direct voice of the poet hides from the beginning of the poem to its end, or the name that the poet speaks through which about himself detached from his or her substantiality, or he is just a historic character..., behind that the poet hides himself to interpret the situation that he wants or to criticize the vices of modern age through it, or to speak of it for some of his concerns and wor...

localizing the optic disc (od) in retinal fundus images is of critical importance, since it is very similar to hard exudates (found in pathology) in color and brightness. because of the importance of od localization in clinical applications, many techniques have been developed. in this paper, we present the results obtained from two methods, correlation and least square, to approximate the opti...

OBJECTIVE We compared multiple neural networks with a density mask for the automatic detection and quantification of ground-glass opacities on high-resolution CT under clinical conditions. SUBJECTS AND METHODS Eighty-four patients (54 men and 30 women; age range, 18-82 years; mean age, 49 years) with a total of 99 consecutive high-resolution CT scans were enrolled in the study. The neural net...

BACKGROUND Pressure ulcers (stages III and IV) are serious safety events (ie, never events). Healthcare institutions are no longer reimbursed for costs to care for affected patients. Medical devices are the leading cause of pediatric pressure ulcers. Face masks for noninvasive ventilation were associated with a high percentage of pressure ulcers at our institution. METHODS A prospective cohor...