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Related Concept Videos

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
IR Spectrum01:19

IR Spectrum

When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
Absorption of Radiation01:05

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
The...

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Updated: May 24, 2026

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
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Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging

Published on: May 5, 2011

Infrared thermal imaging in medicine.

E F J Ring1, K Ammer

  • 1Medical Imaging Research Unit, University of Glamorgan, Pontypridd, CF37 1DL, UK. efring@glam.ac.uk

Physiological Measurement
|February 29, 2012
PubMed
Summary

Modern infrared imaging offers objective temperature measurements for medical applications. Understanding thermal physiology and proper technique are crucial for the reliable use of thermal imaging in diagnosing conditions like inflammatory diseases and fever.

Area of Science:

  • Medical Imaging
  • Biophysics
  • Clinical Thermography

Background:

  • Infrared imaging utilizes naturally emitted skin surface radiation.
  • Standardization protocols are essential for thermal imaging in medicine.
  • Equipment and recording methods influence image reliability.

Purpose of the Study:

  • To review features of modern infrared imaging technology.
  • To discuss standardization protocols for medical thermal imaging.
  • To explore established and emerging medical applications.

Main Methods:

  • Review of current infrared imaging technology.
  • Analysis of standardization protocols.
  • Examination of medical literature on thermal imaging applications.

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High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
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High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

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Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity
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Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity

Published on: September 28, 2022

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Last Updated: May 24, 2026

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
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Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging

Published on: May 5, 2011

High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
11:05

High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

Published on: January 21, 2015

Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity
08:16

Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity

Published on: September 28, 2022

Main Results:

  • Thermal imaging provides objective measurements of clinically significant temperature changes.
  • Established applications include inflammatory diseases, complex regional pain syndrome, and Raynaud's phenomenon.
  • Emerging applications include fever screening and other assessment modalities.

Conclusions:

  • Critical use and understanding of thermal physiology enhance the credibility of medical thermal imaging.
  • Thermal imaging is a valuable tool for objective assessment in various medical fields.
  • Continued research is expanding the utility of thermal imaging in healthcare.