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

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

426
Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
426
Introduction to z Scores01:06

Introduction to z Scores

11.0K
A z score (or standardized value) is measured in units of the standard deviation. It tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores...
11.0K
Introduction to z Scores01:05

Introduction to z Scores

1.2K
A z score (or standardized value) is measured in units of the standard deviation. It indicates how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores...
1.2K
z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

18.4K
z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of...
18.4K
Calculating the Equilibrium Constant02:46

Calculating the Equilibrium Constant

37.6K
The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression.
For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation:
37.6K
Calculating Standard Free Energy Changes02:49

Calculating Standard Free Energy Changes

24.7K
The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
24.7K

You might also read

Related Articles

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

Sort by
Same author

Professional identity formation: Who am I? Where am I going?

AEM education and training·2025
Same author

Calculated decisions: Canadian C-spine rule.

Emergency medicine practice·2023
Same author

Calculated decisions: NEXUS criteria for c-spine imaging.

Emergency medicine practice·2023
Same author

Calculated decisions: modified Rankin Scale for neurologic disability.

Emergency medicine practice·2023
Same author

Calculated decisions: NIH Stroke Scale/Score (NIHSS).

Emergency medicine practice·2023
Same author

Calculated decisions: Alberta Stroke Program Early CT Score (ASPECTS).

Emergency medicine practice·2023

Related Experiment Video

Updated: Jan 22, 2026

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies
10:45

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies

Published on: February 7, 2025

1.5K

Calculated Decisions: Alberta Stroke Program Early CT Score (ASPECTS)

Daniel Runde1

  • 1Department of Emergency Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA

Emergency Medicine Practice
|July 12, 2019
PubMed
Summary

The Alberta Stroke Program Early CT Score (ASPECTS) evaluates middle cerebral artery stroke severity. This method uses computed tomography imaging to assess early stroke changes.

More Related Videos

Mobile Game-based Virtual Reality Program for Upper Extremity Stroke Rehabilitation
05:52

Mobile Game-based Virtual Reality Program for Upper Extremity Stroke Rehabilitation

Published on: March 8, 2018

19.6K
A Rehabilitation Program of Exoskeleton-assisted Body Weight-Supported Treadmill Training with Non-immersive Virtual Reality for Stroke Patients
06:00

A Rehabilitation Program of Exoskeleton-assisted Body Weight-Supported Treadmill Training with Non-immersive Virtual Reality for Stroke Patients

Published on: May 16, 2025

1.0K

Related Experiment Videos

Last Updated: Jan 22, 2026

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies
10:45

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies

Published on: February 7, 2025

1.5K
Mobile Game-based Virtual Reality Program for Upper Extremity Stroke Rehabilitation
05:52

Mobile Game-based Virtual Reality Program for Upper Extremity Stroke Rehabilitation

Published on: March 8, 2018

19.6K
A Rehabilitation Program of Exoskeleton-assisted Body Weight-Supported Treadmill Training with Non-immersive Virtual Reality for Stroke Patients
06:00

A Rehabilitation Program of Exoskeleton-assisted Body Weight-Supported Treadmill Training with Non-immersive Virtual Reality for Stroke Patients

Published on: May 16, 2025

1.0K

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Stroke is a leading cause of death and disability worldwide.
  • Early assessment of stroke severity is crucial for timely and effective treatment.
  • Computed tomography (CT) is a primary imaging modality for acute stroke evaluation.

Purpose of the Study:

  • To describe the Alberta Stroke Program Early CT Score (ASPECTS) methodology.
  • To explain how ASPECTS quantifies early ischemic changes in the middle cerebral artery (MCA) territory.
  • To highlight the utility of ASPECTS in assessing stroke severity.

Main Methods:

  • ASPECTS utilizes a standardized 10-point scale.
  • The scoring system divides the MCA territory into 10 regions of interest.
  • Each region is assessed on non-contrast CT for signs of early infarction.

Main Results:

  • ASPECTS provides a quantitative measure of early ischemic changes.
  • Lower ASPECTS scores correlate with greater infarct burden and poorer outcomes.
  • The score aids in patient selection for acute stroke therapies.

Conclusions:

  • ASPECTS is a reliable and reproducible tool for assessing early ischemic changes in MCA strokes.
  • It facilitates rapid clinical decision-making in acute stroke management.
  • The score is integral to modern stroke protocols.