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

Density00:56

Density

18.0K
Density is an important characteristic of substances, crucial in determining whether an object sinks or floats in a fluid. Its SI unit is kg/m3, and its cgs unit is g/cm3. The density of an object helps in identifying its composition, and also reveals information about the phase of the matter and its substructure. The densities of liquids and solids are roughly comparable, consistent with the fact that their atoms are in close contact. However, gases have much lower densities than liquids and...
18.0K
Density, Specific Weight, Specific Gravity and Compressibility of Fluid01:27

Density, Specific Weight, Specific Gravity and Compressibility of Fluid

1.1K
Density, specific weight, specific gravity, and compressibility are fundamental properties of fluids. Density is the mass per unit volume, characterizing the mass of a fluid system. It influences buoyancy, pressure, flow dynamics, viscosity, thermal conductivity, and sound propagation. For instance, in pipeline design, accurate density measurements ensure that the pipeline can handle the fluid's mass.
Specific weight represents the weight per unit volume and is calculated by multiplying...
1.1K
Density and Archimedes' Principle01:05

Density and Archimedes' Principle

8.0K
When a lump of clay is dropped into water, it sinks. But if the same lump of clay is molded into the shape of a boat, it starts to float. Because of its shape, the clay boat displaces more water than the lump and experiences a greater buoyant force, even though its mass is the same. The same holds true for steel ships. The average density of an object majorly determines if the object will float. If an object's average density is less than that of the surrounding fluid, it will float. The...
8.0K
Body Water Content and Fluid Compartments01:19

Body Water Content and Fluid Compartments

3.4K
Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions...
3.4K
Hypodermis01:02

Hypodermis

6.6K
The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
6.6K
Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

26.2K
Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis...
26.2K

You might also read

Related Articles

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

Sort by
Same author

Giant Intrasellar Aneurysm Presenting with Hypopituitarism.

Internal medicine (Tokyo, Japan)·2026
Same author

Right anterior inferior cerebellar artery supplied by the hypoglossal branch of the ascending pharyngeal artery diagnosed by magnetic resonance angiography.

Surgical and radiologic anatomy : SRA·2026
Same author

Semicircular fenestration of the mid M1 segment of the middle cerebral artery diagnosed by magnetic resonance angiography.

Surgical and radiologic anatomy : SRA·2025
Same author

Carotid-anterior cerebral artery (ACA) anastomosis (infraoptic ACA): review and proposing additional classification of bilateral type.

Surgical and radiologic anatomy : SRA·2025
Same author

Bilateral anterior cerebral artery-anterior communicating artery junction arterial ring (duplicate origin of the A2) associated with unilateral A1 aplasia diagnosed by magnetic resonance angiography.

Surgical and radiologic anatomy : SRA·2025
Same author

Right posterior communicating artery arising from the extreme proximal internal carotid artery, paraclinoid segment, diagnosed by magnetic resonance angiography.

Surgical and radiologic anatomy : SRA·2025

Related Experiment Video

Updated: Nov 11, 2025

A Buoyancy-based Method of Determining Fat Levels in Drosophila
08:00

A Buoyancy-based Method of Determining Fat Levels in Drosophila

Published on: November 1, 2016

8.9K

[Fatty Density and Air].

Akira Uchino1

  • 1Department of Radiology, Saitama Sekishinkai Hospital.

No Shinkei Geka. Neurological Surgery
|March 25, 2021
PubMed
Summary

Intracranial fat is usually benign, but intracranial air can signal serious conditions like head injury or air embolism. Differentiating fat from air using CT attenuation and MRI is crucial for diagnosis.

Area of Science:

  • Neuroradiology
  • Medical Imaging

Background:

  • Both fat and air exhibit lower CT attenuation than water.
  • Intracranial fat, except in ruptured dermoid cysts, is typically clinically insignificant.
  • Intracranial air can indicate serious medical conditions.

Purpose of the Study:

  • To differentiate between intracranial fat and air using imaging findings.
  • To highlight the clinical significance of intracranial air.
  • To discuss the causes and implications of air in various intracranial compartments.

Main Methods:

  • Comparison of CT attenuation values for fat and air.
  • Utilizing T1-weighted MRI for fat-air differentiation.
  • Review of anatomical pathways for air migration.

More Related Videos

Author Spotlight: A Non-Invasive Tool to Assess and Differentiate Fat Patterns in Liver Using 3D Dixon MRI
05:37

Author Spotlight: A Non-Invasive Tool to Assess and Differentiate Fat Patterns in Liver Using 3D Dixon MRI

Published on: October 20, 2023

1.8K
Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol
07:59

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Published on: September 7, 2018

11.8K

Related Experiment Videos

Last Updated: Nov 11, 2025

A Buoyancy-based Method of Determining Fat Levels in Drosophila
08:00

A Buoyancy-based Method of Determining Fat Levels in Drosophila

Published on: November 1, 2016

8.9K
Author Spotlight: A Non-Invasive Tool to Assess and Differentiate Fat Patterns in Liver Using 3D Dixon MRI
05:37

Author Spotlight: A Non-Invasive Tool to Assess and Differentiate Fat Patterns in Liver Using 3D Dixon MRI

Published on: October 20, 2023

1.8K
Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol
07:59

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Published on: September 7, 2018

11.8K

Main Results:

  • CT attenuation lower than orbital fat suggests air.
  • T1-weighted MRI effectively distinguishes fat from air.
  • Pneumocephalus (air in subarachnoid space) signifies head injury, with risks of CSF leak and meningitis.
  • Arterial air indicates air embolism, a serious condition linked to trauma, procedures, and specific risk factors.
  • Iatrogenic air in dural sinuses is usually asymptomatic.

Conclusions:

  • Distinguishing intracranial fat from air is vital due to their differing clinical significance.
  • Air in the subarachnoid space and arteries requires urgent attention.
  • Understanding imaging characteristics and anatomical routes aids in diagnosing and managing intracranial air.