Understanding peripheral optical errors and their impact on vision is important for various applications, e.g. research on myopia development and optical correction of patients with central visual field loss. In this study, we investigated whether correction of higher order aberrations with adaptive optics (AO) improve resolution beyond what is achieved with best peripheral refractive correctio...

Introduction:Detecting renal allograft dysfunction early will allow timely diagnosis and treatment. There is no objective recommendation by national kidney societies for glomerular filtration rate (eGFR) estimation in post-transplant setting. 99mTc-DTPA Technetium-99m Diethylene triamine penta acetic acid) renogram can identify early renal dysfunction much before ser...

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introduction: attenuation correction is a useful process for improving myocardial perfusion spect and is dependent on activity and distribution of attenuation coefficients in the body (attenuation map). attenuation artifacts are a common problem in myocardial perfusion spect. the aim of this study was to compare the effect of attenuation correction using different attenuation maps and different...

INTRODUCTION Correction of penile curvature by corporal rotation enabled the correction of 90 degrees ventral curvature with neither shortening nor erectile dysfunction. However, some limitations were described, and only one case was reported upon. AIM This work described a 3-year experience with corporeal rotation, the modifications addressing and eliminating its drawbacks and limitations, a...

Mapping of vegetation in mountain areas based on remote sensing is obstructed by atmospheric and topographic distortions. A variety of atmospheric and topographic correction methods has been proposed to minimize atmospheric and topographic effects and should in principle lead to a better land cover classification. Only a limited number of atmospheric and topographic combinations has been tested...

In a citation classic, Wainer (1976) claimed that the expected loss in predictable variation due to using equal linear regression weights (applied to standardized predictors), instead of using optimal weights, is linearly increasing in k, the number of predictors. Wainer claimed to prove this while assuming that weights are independent and follow a uniform distribution on the interval (1=4;3=4)...

An unruptured aneurysm of the left sinus of Valsalva was diagnosed by angiography in a 16-year-old male subject 19 years ago. A recent repeated angiographic study documented no change in the aneurysm over the 19-year interval, and the patient has remained asymptomatic. We are aware of no other long-term follow-up reports of patients with this lesion who have not had surgical correction. This ca...