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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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Related Experiment Video

Updated: Jun 23, 2026

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Published on: July 17, 2012

Design and evaluation of a continuous-wave diffuse optical tomography system.

A Siegel, J J Marota, D Boas

    Optics Express
    |April 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an affordable, portable diffuse optical tomography (DOT) system for imaging. The system successfully imaged rat brain activity, demonstrating DOT

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    Area of Science:

    • Biomedical Optics
    • Medical Imaging
    • Neuroimaging

    Background:

    • Diffuse optical tomography (DOT) enables imaging of optical properties in scattering media.
    • Existing DOT systems can be complex and costly.
    • Advancements are needed for practical functional brain imaging.

    Purpose of the Study:

    • To develop an inexpensive and portable continuous-wave DOT system.
    • To demonstrate the system's capability for functional brain imaging in rats.
    • To address technical challenges in large-area DOT.

    Main Methods:

    • Construction of a continuous-wave DOT system with 18 laser sources (780nm, 830nm) and 16 silicon detectors.
    • Acquisition of 288 measurements in under 4 seconds.
    • Application of DOT to image rat brain activity post-forepaw stimulation.

    Main Results:

    • The developed DOT system is inexpensive and portable.
    • The system acquired data rapidly and efficiently.
    • DOT successfully detected functional changes in the rat brain.

    Conclusions:

    • The portable DOT system is a viable tool for functional brain imaging.
    • The results showcase DOT's potential for quantitative neuroimaging.
    • Further advancements in DOT technology are supported by this work.