Results 11 to 20 of about 403,575 (349)

Intensity adaptive optics [PDF]

open access: yesLight Sci Appl
Adaptive optics (AO) is a powerful tool employed across various research fields, from aerospace to microscopy. Traditionally, AO has focused on correcting optical phase aberrations, with recent advances extending to polarisation compensation. However, intensity errors are also prevalent in optical systems, yet effective correction methods are still in ...
Zhao, Z   +14 more
openaire   +4 more sources

Adaptive Optics Ophthalmoscopy [PDF]

open access: yesAnnual Review of Vision Science, 2015
This review starts with a brief history and description of adaptive optics (AO) technology, followed by a showcase of the latest capabilities of AO systems for imaging the human retina and by an extensive review of the literature on clinical uses of AO.
Roorda, Austin, Duncan, Jacque L
openaire   +4 more sources

Accounting for Polychromatic Light in Virtual Shack-Hartmann Wavefront Sensing

open access: yesPhotonic Sensors, 2023
Virtual Shack-Hartmann wavefront sensing (vSHWS) has some significant advantages and is promising for aberration measurement in the field of biomedical optical imaging.
Xian Yue   +5 more
doaj   +1 more source

Adaptive Gradient Estimation Stochastic Parallel Gradient Descent Algorithm for Laser Beam Cleanup

open access: yesPhotonics, 2021
For a high-power slab solid-state laser, obtaining high output power and high output beam quality are the most important indicators. Adaptive optics systems can significantly improve beam qualities by compensating for the phase distortions of the laser ...
Shiqing Ma   +8 more
doaj   +1 more source

COMP Report: CPQR technical quality control guidelines for use of positron emission tomography/computed tomography in radiation treatment planning

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein   +7 more
wiley   +1 more source

Optical Fiber Bundle-Based High-Speed and Precise Micro-Scanning for Image High-Resolution Reconstruction

open access: yesSensors, 2021
We propose an imaging method based on optical fiber bundle combined with micro-scanning technique for improving image quality without complex image reconstruction algorithms.
Jiali Jiang   +11 more
doaj   +1 more source

Image quality comparisons of coil setups in 3T MRI for brain and head and neck radiotherapy simulations

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza   +6 more
wiley   +1 more source

Clinical commissioning of an adaptive radiotherapy platform: Results and recommendations

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Online adaptive radiotherapy platforms present a unique challenge for commissioning as guidance is lacking and specialized adaptive equipment, such as deformable phantoms, are rare. We designed a novel adaptive commissioning process consisting of end‐to‐end tests using standard clinical resources.
Kelly Kisling   +5 more
wiley   +1 more source

The Measurement and Correction of Atmospheric Dispersion in 4-Meter Telescope With Adaptive Optical System

open access: yesIEEE Photonics Journal, 2023
Atmospheric dispersion is a wavelength-dependent effect that affects astronomical observations performed using ground-based telescopes. The effect of atmospheric dispersion for a 4-meter telescope is analyzed and an atmospheric dispersion corrector (ADC)
Guoqing Gao   +5 more
doaj   +1 more source

Sensorless Adaptive Optics

open access: yes, 2020
This tutorial describes the principles and practical implementation of sensorless adaptive optics.
Hampson, Karen Mary   +3 more
openaire   +3 more sources

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