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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

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Effects of non-decontamination human activities on the reduction of ambient dose equivalent rates in residential areas near the Fukushima Daiichi Nuclear Power Plant.

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Erratum: Optical imaging for the characterization of radioactive carbon and oxygen ion beams (2019<i>Phys. Med. Biol</i>.<b>64</b>115009).

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3-Acetyl-11-Keto-β-Boswellic acid (AKBA) Attenuated 6-Hydroxydopamine (6-OHDA)-Induced Toxicity in SH-SY5Y Cells via Modulation of Akt/mTOR Pathway.

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Development of a prediction model for ambient dose equivalent rate distribution based on ecological half-life profiles using LASSO regression and KURAMA data.

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Related Experiment Video

Updated: Jun 2, 2026

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities
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Computer simulations for internal dosimetry using voxel models.

Sakae Kinase1, Akram Mohammadi, Masa Takahashi

  • 1Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1195, Japan. kinase.sakae@jaea.go.jp

Radiation Protection Dosimetry
|April 19, 2011
PubMed
Summary

Voxel models, combined with Monte Carlo simulations, accurately reproduce measurement results for internal dosimetry. These anatomically realistic models are crucial for preclinical assessments and radiation protection applications.

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Last Updated: Jun 2, 2026

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Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Area of Science:

  • Medical Physics
  • Radiological Sciences
  • Computational Biology

Background:

  • Voxel models are increasingly utilized in internal dosimetry.
  • Accurate absorbed fractions (AFs) and S values are essential for dosimetry assessments.

Purpose of the Study:

  • To evaluate the utility of voxel models for internal dosimetry applications.
  • To assess the accuracy of Monte Carlo simulations using voxel models.

Main Methods:

  • Monte Carlo simulations were employed.
  • Human (Japanese, Caucasian) and animal (mouse, frog) voxel models were used.
  • Absorbed fractions (AFs) and S values were calculated.

Main Results:

  • Voxel model data adequately reproduced measurement results.
  • Computational calibration of in vivo measurement systems was achieved.
  • AFs were evaluated for preclinical radiopharmaceutical assessments and environmental radiation protection.

Conclusions:

  • Voxel models are significant tools for internal dosimetry due to their anatomical realism.
  • These models facilitate accurate in vivo measurement efficiency corrections and interspecies dose scaling.
  • Future studies on human variability and interspecies scaling are promising.