Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Evaluation of image quality in terahertz pulsed imaging using test objects.

A J Fitzgerald1, E Berry, R E Miles

  • 1Academic Unit of Medical Physics and Centre of Medical Imaging Research, University of Leeds, Leeds, LS1 3EX, UK.

Physics in Medicine and Biology
|November 28, 2002
PubMed
Summary

New test objects and methods objectively evaluate terahertz (THz) imaging quality. Time-delay imaging offers higher signal-to-noise ratio (SNR) than intensity-based methods for improved THz image analysis.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A national survey of radiographer and assistant practitioner's experiences of incidents, investigation processes and safety culture.

Radiography (London, England : 1995)·2026
Same author

A survey to determine the use and evaluation of simulation-based education within UK pre-registration diagnostic radiography education.

Radiography (London, England : 1995)·2025
Same author

"Making it work in the face of extreme adversity" - Exploring perceptions for the future of the imaging and oncology workforce using 'soundbite' interviews.

Radiography (London, England : 1995)·2024
Same author

Dementia education for Diagnostic Radiography students: Impact on confidence, knowledge, and attitudes towards dementia.

Radiography (London, England : 1995)·2024
Same author

Understanding public attitudes to death talk and advance care planning in Northern Ireland using health behaviour change theory: a qualitative study.

BMC public health·2022
Same author

Co-registered combined OCT and THz imaging to extract depth and refractive index of a tissue-equivalent test object.

Biomedical optics express·2020

Area of Science:

  • Optics and Photonics
  • Medical Imaging Technology
  • Applied Physics

Background:

  • Terahertz (THz) imaging systems, like other modalities, face limitations in spatial resolution, contrast, and noise.
  • Quantitative and objective evaluation methods are crucial for advancing THz imaging technology.

Purpose of the Study:

  • To introduce novel test objects and image analysis techniques for objective THz image quality assessment.
  • To enable quantitative comparison of different THz imaging system configurations and acquisition methods.
  • To assess the impact of various image parameters on THz image performance.

Main Methods:

  • Design and fabrication of two specialized test objects: one for Modulation Transfer Function (MTF) determination and another for Signal-to-Noise Ratio (SNR) derivation across varying contrasts.

Related Experiment Videos

  • Evaluation of spatial resolution using the 20% threshold of the MTF.
  • Comparison of image SNR between time-domain and frequency-domain parameters.

    • Main Results:

    • Higher terahertz frequencies correlated with larger MTFs, indicating improved spatial resolution.
    • Time-delay based THz images consistently exhibited higher SNR compared to intensity-based parameters (e.g., relative transmittance).
    • Intensity-based parameters were more susceptible to noise sources like laser fluctuations and detector shot noise.

    Conclusions:

    • The developed test objects and methods provide a quantitative framework for evaluating THz imaging systems.
    • Time-delay imaging is a superior approach for achieving higher SNR in THz imaging compared to intensity-based methods.
    • Objective image quality assessment is vital for the optimization and advancement of terahertz imaging applications.