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

Generalized Hooke's Law01:22

Generalized Hooke's Law

2.7K
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
2.7K
Generalized Anxiety Disorder01:30

Generalized Anxiety Disorder

707
Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...
707
Social Foundations of Self II: The Generalized Other01:20

Social Foundations of Self II: The Generalized Other

261
According to George Herbert Mead, as children progress beyond the game stage, they develop a more comprehensive understanding of societal rules and norms. This cognitive and social development enables them to internalize the expectations of the broader community, refining their ability to regulate behavior.Consistent participation in organized activities is crucial in helping children recognize that their actions are not isolated but contribute to a more significant, interconnected group...
261
Generalization, Discrimination, and Extinction01:24

Generalization, Discrimination, and Extinction

1.4K
Generalization, discrimination, and extinction are key concepts in operant conditioning that influence how behaviors are learned and maintained.
Generalization occurs when a behavior reinforced in one context is performed in similar situations. For instance, a student who studies diligently for calculus and receives excellent grades might apply the same study habits to psychology and history, expecting similar results. Generalization shows how learning in one setting can influence behavior in...
1.4K
Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

1.2K
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
1.2K
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

883
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
883

You might also read

Related Articles

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

Sort by
Same author

Dysregulated m6A RNA methylation in tuberculosis: association with altered methyltransferase expression and immune responses.

BMC infectious diseases·2026
Same author

Attenuation-based ultra-low-dose lung computed tomography at 0.1 mSv to 0.3 mSv effective dose in children.

Pediatric radiology·2026
Same author

The Potential Role of Artificial Intelligence in Systematic Follow-Up Recommendation Tracking and Outcome Assessment.

Journal of the American College of Radiology : JACR·2025
Same author

Radiation dose optimisation in paediatric head CT using attenuation-based auto prescription.

Scientific reports·2025
Same author

Development and Validation of a Nomogram to Predict Airway Fibrostenosis in Tracheobronchial Tuberculosis.

Respiration; international review of thoracic diseases·2025
Same author

Real-World and Clinical Trial Validation of a Deep Learning Radiomic Biomarker for PD-(L)1 Immune Checkpoint Inhibitor Response in Advanced Non-Small Cell Lung Cancer.

JCO clinical cancer informatics·2024
Same journal

Correction to "On the shape of the radiation survival curve in tumor spheroids: The role of oxygen heterogeneity".

Medical physics·2026
Same journal

Multi-view constrained semi-supervised vertebra detection for 3D ultrasound spine volume.

Medical physics·2026
Same journal

Accuracy of quantitative <sup>177</sup>Lu SPECT/CT imaging: A systematic review.

Medical physics·2026
Same journal

Physics-constrained dual-domain network for CBCT reconstruction from orthogonal X-rays in gynecologic radiotherapy.

Medical physics·2026
Same journal

Decomposition-based harmonization for quantitative PET imaging across scanners and radiotracers.

Medical physics·2026
Same journal

Development and evaluation of an in vivo dose-based monitoring system for electron FLASH radiation therapy.

Medical physics·2026
See all related articles

Related Experiment Video

Updated: Feb 2, 2026

Automated Midline Shift and Intracranial Pressure Estimation based on Brain CT Images
14:08

Automated Midline Shift and Intracranial Pressure Estimation based on Brain CT Images

Published on: April 13, 2013

43.5K

CT automated exposure control using a generalized detectability index.

P Khobragade1, Franco Rupcich2, Jiahua Fan2

  • 1Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, WI, 53233, USA.

Medical Physics
|November 13, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a new automated exposure control (AEC) method using a generalized detectability index to ensure consistent image quality (IQ) across various iterative reconstruction algorithms in CT scans. The developed -AEC method shows promise in achieving equivalent IQ at reduced radiation doses.

Keywords:
CTMTFNPSAutomated exposure controlgeneralized detectability indexnoise texture and image quality

More Related Videos

Automated, High-Throughput Detection of Bacterial Adherence to Host Cells
07:21

Automated, High-Throughput Detection of Bacterial Adherence to Host Cells

Published on: September 17, 2021

4.0K
Automated Detection and Analysis of Exocytosis
13:28

Automated Detection and Analysis of Exocytosis

Published on: September 11, 2021

3.9K

Related Experiment Videos

Last Updated: Feb 2, 2026

Automated Midline Shift and Intracranial Pressure Estimation based on Brain CT Images
14:08

Automated Midline Shift and Intracranial Pressure Estimation based on Brain CT Images

Published on: April 13, 2013

43.5K
Automated, High-Throughput Detection of Bacterial Adherence to Host Cells
07:21

Automated, High-Throughput Detection of Bacterial Adherence to Host Cells

Published on: September 17, 2021

4.0K
Automated Detection and Analysis of Exocytosis
13:28

Automated Detection and Analysis of Exocytosis

Published on: September 11, 2021

3.9K

Area of Science:

  • Medical Imaging
  • Radiology
  • Image Reconstruction

Background:

  • Iterative reconstruction (IR) algorithms in CT imaging offer improved image quality but complicate tube current selection due to complex relationships between resolution, noise, and dose.
  • Existing automated exposure control (AEC) systems often struggle to maintain consistent image quality (IQ) across different IR algorithms.

Purpose of the Study:

  • To develop and evaluate a generalized detectability index () based AEC method for consistent IQ across diverse CT reconstruction techniques.
  • To determine the optimal noise parameter for AEC systems when using iterative reconstruction.

Main Methods:

  • A task-based AEC method utilizing a generalized detectability index () was proposed, leveraging existing AEC principles based on prescribed noise levels.
  • Lookup tables for task-based modulation transfer function (MTF) and noise power spectrum (NPS) were generated using phantom scans with varying tube currents and reconstructed with different IR algorithms.
  • The -AEC method's performance was assessed by evaluating image quality on ACR and anthropomorphic phantoms using both objective metrics and human reader studies.

Main Results:

  • The -AEC method demonstrated reasonable agreement between predicted and measured values, with a mean absolute error of 15% in phantom studies.
  • Human readers rated images from the -AEC method as having statistically equivalent IQ across reference and IR1-IR3 reconstructions (P > 0.35).
  • The -AEC method achieved equivalent IQ at lower radiation doses for IR scans compared to reference scans.

Conclusions:

  • A novel AEC method based on a generalized detectability index () was successfully investigated for CT imaging.
  • The proposed -AEC method can be integrated with existing AEC systems to optimize tube current settings for iterative reconstruction algorithms.
  • Preliminary results suggest the -AEC approach can yield consistent image quality across different iterative reconstruction methods and dose levels.