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 Concept Videos

Aliasing01:18

Aliasing

731
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
731
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

1.5K
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
1.5K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

903
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
903
Atomic Force Microscopy01:08

Atomic Force Microscopy

4.6K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
4.6K
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

4.0K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
4.0K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

1.9K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
1.9K

You might also read

Related Articles

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

Sort by
Same author

[Association between heparin-binding protein and other clinical indicators with the microscopic severity of <i>Mycoplasma pneumoniae</i> pneumonia].

Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics·2026
Same author

New epidemiological characteristics of childhood IgA vasculitis in the post-COVID-19 era: a single-center retrospective cohort study.

Pediatric rheumatology online journal·2026
Same author

Trajectories of serum HIF-1α and BNIP3 are associated with injury severity and outcomes in pediatric traumatic brain injury: a prospective cohort study.

BMC pediatrics·2026
Same author

The Alpha-SPECT-Mini: A Small-Animal SPECT System based on Hyperspectral Compound-Eye Gamma Cameras.

IEEE transactions on radiation and plasma medical sciences·2026
Same author

[Predictive factors and nomogram model construction for plastic bronchitis in children with <i>Mycoplasma pneumoniae</i> pneumonia].

Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics·2025
Same author

Experimental Evaluation of Maximum-Likelihood-Based Data Preconditioning for DE-SPECT: A Clinical SPECT System Constructed With CZT Imaging Detectors.

IEEE transactions on radiation and plasma medical sciences·2025
Same journal

Imaging Results from a Direct Conversion X-ray Detector with TlBr and CMOS Pixel Array.

IEEE transactions on nuclear science·2026
Same journal

Doping schemes in Thallium Chloride to Increase Scintillation Light Yield for Fast Gamma Detection.

IEEE transactions on nuclear science·2026
Same journal

Characterization of Thick Selenium Layers for Dual-Layer X-ray Imaging.

IEEE transactions on nuclear science·2026
Same journal

Use of Different Reactor Physics Models and CADIS Accelerated MCNP to Yield a 1 MeV Silicon Equivalent Flux for Neutron Damage.

IEEE transactions on nuclear science·2025
Same journal

TlBr Films for Direct Digital Radiography.

IEEE transactions on nuclear science·2025
Same journal

Chopped Cold Neutron Beam Activation Analysis.

IEEE transactions on nuclear science·2024
See all related articles

Related Experiment Video

Updated: Mar 11, 2026

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

18.8K

Adaptive Angular Sampling for SPECT Imaging.

Nan Li1, Ling-Jian Meng1

  • 1Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana Champaign, Urbana-Champaign, IL 61801 USA.

IEEE Transactions on Nuclear Science
|November 22, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces adaptive angular sampling for single photon emission computed tomography (SPECT) imaging. This method optimizes sampling strategies to minimize image variance, enhancing image quality in regions-of-interest.

Keywords:
Adaptive angular samplingnon-uniform object-space pixelation (NUOP) approachsingle photon emission computed tomography (SPECT)

More Related Videos

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material
11:57

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

14.0K
Near Infrared Optical Projection Tomography for Assessments of &#946;-cell Mass Distribution in Diabetes Research
15:18

Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research

Published on: January 12, 2013

17.0K

Related Experiment Videos

Last Updated: Mar 11, 2026

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

18.8K
Measuring Spatially- and Directionally-varying Light Scattering from Biological Material
11:57

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

14.0K
Near Infrared Optical Projection Tomography for Assessments of &#946;-cell Mass Distribution in Diabetes Research
15:18

Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research

Published on: January 12, 2013

17.0K

Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Computational Imaging

Background:

  • Single photon emission computed tomography (SPECT) imaging relies on optimal data acquisition strategies.
  • Conventional uniform angular sampling may not be the most efficient method for all imaging scenarios.
  • Minimizing image variance is crucial for accurate diagnostic interpretation in SPECT.

Purpose of the Study:

  • To develop and present an analytical approach for adaptive angular sampling in SPECT.
  • To enable rapid determination of sampling strategies that minimize image variance in regions-of-interest (ROIs).
  • To improve overall image quality and sampling efficiency in nuclear imaging.

Main Methods:

  • Development of close-form equations to evaluate image variance and resolution for given sampling strategies.
  • Implementation of a gradient-based algorithm to search for the optimal sampling strategy.
  • Utilizing an efficient computation approach to accelerate the search process.

Main Results:

  • Demonstrated adaptive angular sampling on a single-head SPECT system.
  • Showed that adaptive sampling allocates more imaging time to angles yielding crucial information.
  • Achieved significantly lowered image variance compared to uniform angular sampling.

Conclusions:

  • The proposed analytical approach effectively determines optimal adaptive angular sampling strategies for SPECT.
  • Adaptive angular sampling leads to improved image quality by reducing variance.
  • The method is applicable to various nuclear imaging systems (SPECT, PET, X-ray CT) with adaptive hardware.