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Related Experiment Video

Updated: Jan 25, 2026

Particle Image Velocimetry Investigation of Hemodynamics via Aortic Phantom

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Investigation into Factors Influencing Fuji S-Value Using an Extremity Phantom.

¹Department of Veterinary Clinical Sciences, University of Liverpool, Small Animal Teaching Hospital, Neston, Wirral, UK.

Journal of Medical Imaging and Radiation Sciences

|May 5, 2019

Summary

Collimation is the key factor affecting the S-value in Fuji computed radiography (CR) systems, impacting exposure index reliability. Tight collimation and rapid processing are essential for accurate CR imaging and diagnostic quality.

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Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure

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Published on: February 12, 2018

Area of Science:

Medical Imaging
Radiography Technology

Background:

Exposure indices are manufacturer-provided metrics for computed radiography (CR) quality assessment.
Recommended exposure index ranges exist, but other factors can influence these values.

Purpose of the Study:

To investigate factors influencing the S-value, an exposure index for Fuji CR systems.
To determine the impact of collimation on CR exposure indices.

Main Methods:

Utilized an extremity phantom for CR imaging.
Analyzed the influence of collimation on the S-value using a Fuji CR system.

Main Results:

Collimation was identified as the most significant factor affecting the S-value.
Optimal S-value reliability depends on understanding and applying knowledge of CR system behavior.

Conclusions:

Tight collimation, without excluding relevant anatomy, is crucial for accurate CR imaging.
Rapid processing of CR imaging plates post-exposure is necessary to preserve latent image information.
Enhanced understanding and application of CR principles improve the reliability of S-value exposure indices.