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Assessment of longitudinal beam property and contrast uniformity for ...


quality control of dynamic x-ray imaging systems / efomp protocol

For fixed fluoroscopy units with an integral undercouch tube the patient support will always intercept the radiation beam and so evaluation should be made with ...

Atsushi Urikura - Papers - researchmap

Assessment of longitudinal beam property and contrast uniformity for 256- and 320-row area detector computed tomography scanners in the 160-mm nonhelical ...

Uniform Standard Specifications for Public Works Construction ...

The limits for evaluation shall be between the longitudinal weakened plane or construction joint on each side ... housing for uniform heating. A revolution ...

QA Phantoms - Imaging Solutions

- Low-contrast resolution. - Optical density. - High-contrast resolution. Fluoroscopic Beam ... evaluation of resolution, contrast and density uniformity. The ...

Artifacts and Technical Considerations at Contrast-enhanced US

Other artifacts are exclusive to CEUS owing to the techniques used for contrast mode image generation and the unique properties of the ...

Waveguide-based augmented reality displays - eLight - SpringerOpen

These include image quality, FoV, eyebox, color uniformity, waveguide combiner's efficiency, ambient contrast ratio (ACR), transmittance of ...

Ultrasound (introduction) | Radiology Reference Article - Radiopaedia

In contrast, the upper range of audible frequencies for humans is around 20 thousand cycles per second (20 kHz) 2. Ultrasound images are ...

Performance of actinic EUVL mask imaging using a zoneplate ...

The coherence properties vary with operating conditions, including the longitudinal position of the mask. For example, in static illumination mode, with the ...

Practical Guide to Machine Vision Lighting - Advanced Illumination

The properties of IR light can be useful in vision inspection for a variety of reasons. First, IR light is effective at neutralizing contrast differences based ...

IAEA HumAn HEAltH SErIES

included in the uniformity analysis calculations are determined in one ... inserts for resolution and contrast assessments (left) and the assembled phantom (right) ...

Bridge Design Manual - South Carolina Department of Transportation

The Bridge Design Teams are the Bridge Design Section's focal point for the preparation of all in-house structural designs. The Bridge Design Teams have the day ...

BACK TO BASICS General Principles of Echocardiography Ultrasound

SPACIAL AVERAGE – average intensity in the sound beam and is usually measured at the transducer face. BEAM UNIFORMITY RATIO/COEFFICIENT (SP/SA) – ratio between ...

Longitudinal aliasing in multislice helical computed tomography

center lines of the four oblique longitudinal beam profiles illustrated in Fig. 2. For reconstruction purposes, the obliqueness of the projections is ...

Qualitative evaluation of headlamp beam-pattern uniformity

Abstract. This study consisted of two experiments. In the first experiment, a survey of driver opinions concerning beam-pattern uniformity was conducted.

Generation of uniform transverse beam distributions for high-energy ...

Therefore this assumption is valid for practical experimental studies. From the above analysis, the octupoles have a negligible effect on the ...

Longitudinal Beam Characterisation on VELA using a Transverse ...

The transverse deflecting cavity is a 9-cell standing wave S-band cavity and the design was intended to provide 10 fs temporal resolution for the 250 MeV beam ...

Complex beam profiles for laser annealing of thin-film CdTe ...

Although the pedestal beam produces greater uniformity in temperature profile compared to a Gaussian beam as shown in Fig. 9 ...

Mode Analysis for Electromagnetic Waveguides in COMSOL

... property, or frequency — and change ... Beam Envelopes physics interface using a propagation constant directly from Boundary Mode Analysis.

PDDG Chapter 4 - Horizontal and Vertical Alignment - Mass.gov

Private property and land use ... If the flatter entering curve is less than or equal to 500 feet, a uniform longitudinal gradient should be used throughout the ...

IESNA lighting distribution types and their applications - ZGSM

This type of distribution curve is used for devices like LED spotlights and floodlights . Since the light beams from these luminaires are concentrated within a ...