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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...
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

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ScanSim: A tool for simulating optical-CT imaging.

Mark Oldham1

  • 1Duke University Medical Center, Durham, NC USA.

Journal of Physics. Conference Series
|September 28, 2011
PubMed
Summary
This summary is machine-generated.

A new software tool, ScanSim, simulates optical-CT scanning. It helps reduce image artifacts and improve accuracy, even without matching fluids, by analyzing different scanning modes and refractive indices.

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Area of Science:

  • Medical Physics
  • Image Reconstruction
  • Optical Imaging

Background:

  • Optical-CT scanning is a valuable tool for 3D dosimetry.
  • Accurate image formation is crucial for reliable dose reconstruction.
  • Image artifacts can arise from variations in refractive index.

Purpose of the Study:

  • To introduce ScanSim, a novel software for simulating optical-CT image formation.
  • To evaluate the impact of different scanning configurations and refractive indices on image quality.
  • To demonstrate ScanSim's utility in understanding and mitigating image artifacts.

Main Methods:

  • Developed ScanSim software with diverging point source and converging broad beam modes.
  • Simulated optical-CT scans of Presage dosimeters.
  • Varied the refractive index of the surrounding medium (air, water, matched).

Main Results:

  • Observed significant differences in edge artifacts between scanning modes.
  • Reconstructed coefficient accuracy varied with refractive index.
  • ScanSim successfully simulated image formation across different conditions.

Conclusions:

  • ScanSim is a powerful tool for investigating optical-CT image formation.
  • The software aids in quantifying artifacts and improving reconstruction accuracy.
  • ScanSim can help reduce the dependence on refractive index matching fluids.