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Related Concept Videos

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Related Experiment Video

Updated: Jun 12, 2026

Multi-modal Pulmonary Imaging: Using Complementary Information from CT and Hyperpolarized 129Xe MRI to Evaluate Lung Structure-Function
02:09

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

Published on: April 12, 2024

Power cepstrum and spectrum techniques applied to image registration.

D J Lee, T F Krile, S Mitra

    Applied Optics
    |June 10, 2010
    PubMed
    Summary

    This study introduces a fast and accurate image registration method using power cepstrum analysis to correct rotational and translational shifts. The technique enhances fundus image analysis for detecting anomalies.

    Area of Science:

    • Medical Imaging
    • Signal Processing
    • Computer Vision

    Background:

    • Image registration is crucial for analyzing sequential medical images.
    • Conventional correlation techniques can be slow and less accurate for complex shifts.

    Purpose of the Study:

    • To develop a novel, efficient, and accurate image registration algorithm.
    • To apply this algorithm for detecting changes in sequential fundus images.

    Main Methods:

    • Preprocessing to remove extraneous data and prevent false registration parameters.
    • Transforming rotational shifts into translational shifts using power spectrum properties.
    • Applying power cepstrum analysis for precise translational shift correction.

    Main Results:

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    Published on: November 23, 2019

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    Multi-modal Pulmonary Imaging: Using Complementary Information from CT and Hyperpolarized 129Xe MRI to Evaluate Lung Structure-Function
    02:09

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

    Published on: April 12, 2024

    Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
    05:05

    Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

    Published on: November 23, 2019

    • The proposed method achieves high speed and accuracy compared to traditional correlation techniques.
    • Demonstrated effectiveness in registering sequential fundus images.

    Conclusions:

    • Power cepstrum analysis offers a robust approach for image registration.
    • This technique has potential applications in automated detection of fundus anomalies.