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Related Experiment Video

Updated: Aug 14, 2025

Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure

Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure

Published on: February 12, 2018

[Subjective Contrast of Pulmonary Tissues in CsI-FPD Chest Radiography Using Model Phantom by Monte Carlo

Nobuhiro Oda¹, Shuzo Uehara², Tsutomu Nakano³

¹Emeritus Professor, Kyoto College of Medical Science.

Nihon Hoshasen Gijutsu Gakkai Zasshi

|January 18, 2023

Summary

Monte Carlo simulations reveal that X-ray beam quality significantly impacts pulmonary tissue contrast in chest radiography. Subject contrast, particularly for soft tissues, shows minimal variation with beam quality, validating simulation methods.

Keywords:

CsI flat panel detector (FPD)beam quality digital chest radiography (DR)pulmonary tissues subjective contrast

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Multi-modal Pulmonary Imaging: Using Complementary Information from CT and Hyperpolarized 129Xe MRI to Evaluate Lung Structure-Function

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Published on: April 12, 2024

Area of Science:

Medical Imaging Physics
Radiological Science
Computational Modeling

Context:

Chest radiography utilizes X-ray imaging to visualize pulmonary structures.
Cesium iodide flat-panel detectors (CsI-FPD) are common in modern radiography.
Optimizing X-ray beam parameters is crucial for diagnostic image quality.

Purpose:

To investigate the subject contrast of pulmonary tissues under various X-ray beam conditions using Monte Carlo simulations.
To compare subject contrast derived from entered versus absorbed photons in a CsI detector.
To evaluate the feasibility of Monte Carlo simulations as an alternative to physical phantoms for contrast studies.

Summary:

Subject contrast in pulmonary tissues generally increased with lower energy X-ray beams.
Soft tissue and bone-overlaying soft tissue contrast showed limited variation across different beam qualities, except at 70 kV without filtration.
Subject contrast calculated using absorbed photons in the CsI detector was higher than that using entered photons.

Impact:

Monte Carlo simulations provide a viable alternative to physical chest phantoms for studying subject contrast.
Understanding photon interactions within detectors is essential for accurate contrast assessment.
Findings inform the optimization of X-ray beam parameters for improved chest radiography diagnostic accuracy.