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Related Concept Videos

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 Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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Imaging Studies II: Ultrasonography

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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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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.
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Optical Frequency Domain Imaging of Ex vivo Pulmonary Resection Specimens: Obtaining One to One Image to Histopathology Correlation
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Foveated imaging demonstration.

David Wick, Ty Martinez, Sergio Restaino

    Optics Express
    |May 9, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a wide field-of-view imaging system using a spatial light modulator (SLM) to correct aberrations. This innovative approach enables foveated imaging, enhancing resolution where needed.

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    Area of Science:

    • Optical Engineering
    • Image Processing
    • Computational Imaging

    Background:

    • Wide field-of-view (FOV) imaging systems often suffer from off-axis aberrations.
    • Aberrations limit the practical usable FOV in conventional optical systems.
    • Achieving diffraction-limited performance across a wide FOV remains a challenge.

    Purpose of the Study:

    • To demonstrate a wide FOV, theoretically diffraction-limited imaging system.
    • To utilize a spatial light modulator (SLM) for aberration correction.
    • To investigate the feasibility of foveated imaging using an SLM.

    Main Methods:

    • A system comprising a singlet lens, reflective liquid crystal SLM, turning mirror, and CCD camera was constructed.
    • The SLM was programmed to correct off-axis aberrations.
    • The system was operated in a foveated imaging mode.

    Main Results:

    • A wide FOV, theoretically diffraction-limited imaging system was successfully demonstrated.
    • The SLM effectively corrected off-axis aberrations, expanding the usable FOV.
    • The system exhibited foveated imaging characteristics due to spatially varying resolution.

    Conclusions:

    • A single-lens system with an SLM can achieve wide FOV and diffraction-limited imaging.
    • SLM-based aberration correction is a viable method for enhancing optical system performance.
    • This technique enables advanced imaging modes like foveated imaging.