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

Sternberg's Triangular Theory of Love02:15

Sternberg's Triangular Theory of Love

45.9K
We typically love the people with whom we form relationships, but the type of love we have for our family, friends, and lovers differs. Robert Sternberg (1986) proposed that there are three components of love: intimacy, passion, and commitment. These three components form a triangle that defines multiple types of love: this is known as Sternberg’s triangular theory of love. Intimacy is the sharing of details and intimate thoughts and emotions. Passion is the physical attraction—the...
45.9K
Classification of Elements and Compounds02:54

Classification of Elements and Compounds

73.6K
Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
73.6K
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.9K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.9K
Elements and Compounds01:27

Elements and Compounds

105.4K
Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.
Elements
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
105.4K
Rectangular and Triangular Pulse Function01:19

Rectangular and Triangular Pulse Function

2.0K
The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
2.0K
Periodic Classification of the Elements04:00

Periodic Classification of the Elements

59.9K
The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
59.9K

You might also read

Related Articles

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

Sort by
Same author

Percutaneous mastoid electrical stimulator improves Poststroke depression and cognitive function in patients with Ischaemic stroke: a prospective, randomized, double-blind, and sham-controlled study.

BMC neurology·2020
Same author

IPAF should receive early treatment for sharing similar clinical characteristics as CTD-ILD: a report from 273 Chinese patients.

Clinical rheumatology·2020
Same author

New first-line treatment strategies for advanced lung squamous cell carcinoma.

Translational lung cancer research·2020
Same author

Long Noncoding RNA <i>UCA1</i> Facilitates Endometrial Cancer Development by Regulating <i>KLF5</i> and <i>RXFP1</i> Gene Expressions.

Cancer biotherapy & radiopharmaceuticals·2020
Same author

Esmolol inhibits inflammation and apoptosis in the intestinal tissue via the overexpression of NF-κB-p65 in the early stage sepsis rats.

The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology·2020
Same author

Studies on the interactional characterization of preheated silkworm pupae protein (SPP) with anthocyanins (C3G) and their effect on anthocyanin stability.

Food chemistry·2020

Related Experiment Video

Updated: Feb 12, 2026

Design and Use of Multiplexed Chemostat Arrays
19:40

Design and Use of Multiplexed Chemostat Arrays

Published on: February 23, 2013

24.0K

A highly decoupled transmit-receive array design with triangular elements at 7T.

Gang Chen1,2, Bei Zhang1, Martijn A Cloos1,2

  • 1Center for Advanced Imaging Innovation and Research (CAI2 R) and Bernard and Irene Schwartz Center for Biomedical Imaging (CBI), Department of Radiology, New York University School of Medicine, New York, New York.

Magnetic Resonance in Medicine
|March 25, 2018
PubMed
Summary
This summary is machine-generated.

A new transmit array design using triangular coils improves radiofrequency (RF) shimming and parallel imaging at 7T MRI. This design enhances B1 profile diversity and reduces undersampling artifacts, offering better performance than traditional rectangular coil arrays.

Keywords:
RF coiltransmit arrayultrahigh-field (7T)

More Related Videos

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
11:50

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

Published on: June 13, 2015

13.0K
Identifying Protein-protein Interaction Sites Using Peptide Arrays
07:44

Identifying Protein-protein Interaction Sites Using Peptide Arrays

Published on: November 18, 2014

18.6K

Related Experiment Videos

Last Updated: Feb 12, 2026

Design and Use of Multiplexed Chemostat Arrays
19:40

Design and Use of Multiplexed Chemostat Arrays

Published on: February 23, 2013

24.0K
Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
11:50

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

Published on: June 13, 2015

13.0K
Identifying Protein-protein Interaction Sites Using Peptide Arrays
07:44

Identifying Protein-protein Interaction Sites Using Peptide Arrays

Published on: November 18, 2014

18.6K

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Radiofrequency (RF) Coil Design
  • Parallel Imaging Techniques

Background:

  • Transmit arrays are crucial for advanced MRI techniques like RF shimming and parallel excitation, particularly at high field strengths (7T).
  • Optimizing coil geometry is key to improving B1 field homogeneity and reducing signal loss during accelerated imaging.

Purpose of the Study:

  • To introduce and evaluate a novel transmit array design featuring triangular coils.
  • To assess the performance of triangular coil arrays compared to rectangular coil arrays for RF shimming and parallel excitation at 7T.
  • To investigate improvements in B1 profile diversity and decoupling capabilities.

Main Methods:

  • Construction of two 8-channel cylindrical transmit arrays: one with triangular coils and one with rectangular coils.
  • Phantom imaging experiments were conducted to evaluate excitation distribution under various RF shim settings.
  • Geometry factor (g-factor) maps were generated for different acceleration factors and planes to assess image acceleration performance.

Main Results:

  • Triangular coil arrays demonstrated superior decoupling (-20 dB or better) compared to rectangular arrays (worse than -12 dB).
  • While both arrays performed adequately for central transverse plane shimming, the rectangular array showed better off-center performance.
  • The triangular coil array achieved a significant 13.1-fold reduction in maximum g-factor with 2-fold acceleration in the z-direction.

Conclusions:

  • The triangular coil array design offers effective decoupling for neighboring elements and enhanced B1 profile diversity along the z-direction.
  • Separate slice shimming is required for the triangular coil array due to increased B1 diversity.
  • This design is highly suitable for parallel transmit applications, maintaining high receive sensitivity.