Login with Facebook

Magnetic resonance imaging (MRI) - what it is?

Magnetic resonance imaging that is called "MRI," is a diagnostic test that allows you to view the inside of our body without performing surgical operations or administering dangerous ionizing radiation. It was developed around 1980; magnetic resonance imaging has undergone a constant process of technological evolution over the years. Today, due to its extreme diagnostic precision and the almost total absence of side effects, it has gained a role of primary importance in the diagnosis of numerous diseases. Particularly useful in obtaining detailed images of the brain and spine, it can also provide excellent information in the traumatology, oncological, orthopedic, cardiology, and gastroenterological fields. The only limit to its diffusion remains the high cost of the equipment and maintenance operations.

How does Magnetic resonance imaging (MRI) work?

The principle of operation of magnetic resonance imaging is extremely complex and fully comprehensible only to those who know the physical theories underlying quantum mechanics.

By simplifying the concept as much as possible, we can compare atomic nuclei to many small magnets. A bit like a compass needle, in the presence of an external magnetic field, these tiny particles tend to arrange themselves in a preferential direction. If radio waves are emitted at this point, the nuclei undergo temporary position changes. During this transitory phase, the atoms emit signals that can be captured by an electronic detector, which transmits them to a powerful computer where they will be analyzed and processed.

For this reason, magnetic resonance imaging uses a powerful magnet and a radio wave generator with a frequency of 42 megahertz, which corresponds to the number of turns that the protons of the hydrogen atom perform on themselves in one second. This element was chosen both for its physical properties and for its abundance within the human organism. Since not all atomic nuclei take the same time to return to the initial position, analyzing this period, it is possible to recreate a three-dimensional map of the internal anatomical structures, also highlighting their state of hydration.

Risk factors and side effects

Magnetic resonance imaging is a safe and completely harmless investigation for the human organism. The absence of ionizing radiation makes it particularly suitable for the repetition of tests within a short time.

Due to the magnetic field generated by the equipment, people with internal metal appliances, such as pacemakers, metal implants (teeth, eyes, bones, etc.) and vascular clips, cannot undergo the examination. Due to advances in technology for several years now, most of the metals used for medical use are compatible with magnetic resonance imaging.

Application fields

Magnetic resonance imaging (MRI) is successfully used to obtain detailed images of many tissues. The quality of the results allows you to appreciate details that cannot be detected with other diagnostic techniques. Just to cite a few examples, it is possible to study the vascularization of the tissues, the state of hydration of the intervertebral discs, evaluate the health of the joints, and diagnose with extreme precision neurological diseases and some tumor forms.

Magnetic resonance is used to diagnose a wide variety of pathologies, the technique allows, in fact, visualizing the skeleton, joints, and internal organs. The quality of the results allows evaluating details that cannot be detected with another diagnostic technique. For example, with the rm examination, it is possible to investigate the state of hydration of the intervertebral discs, study the vascularization of the tissues, evaluate the health of the joints and diagnose, with remarkable precision, neurological diseases and some tumor forms.

Most used types

Magnetic resonance imaging is used in many fields, in the neurosurgical, neurological, oncological, traumatology, cardiology, orthopedic, gastroenterological fields. The most used types of magnetic resonance imaging are:

- MRI of each joint of the upper limb (shoulder, elbow, wrist, and hand) and lower limb (hip, knee, ankle, and foot)

- Magnetic resonance imaging of the temporomandibular joints,

- Magnetic resonance imaging of the brain,

- Intracranial vascular magnetic resonance imaging, always without contrast medium (angio-MRI brain)

- Vascular magnetic resonance imaging of extracranial arteries, always with contrast medium (angio-RM)

- Magnetic resonance imaging of the chest,

- MRI of the pelvis,

- Magnetic resonance imaging of each skeletal segment.

- MRI cardiac.

- Magnetic resonance imaging of the abdomen (upper, lower, or full).

- Magnetic resonance imaging of the cervical, dorsal, lumbosacral spine.

- Massive facial MRI.

- Magnetic resonance imaging of the breast.

- Magnetic resonance imaging of the neck.

- Magnetic resonance with cholangiographic technique (cholangitis-MRI).

- Magnetic resonance with urographic technique (Uro-RM).

- Multiparametric magnetic resonance imaging of the prostate.

Exam preparation

Magnetic resonance imaging generally does not require fasting or observance of particular diets, so the patient is completely free to eat according to his preferences. Before the examination, the subject is invited to take off any object or clothes containing metal parts (bags, jewelry, belts, wallet, shoes, etc.). A questionnaire will be filled in together with the doctor or staff to ensure that there are no contraindications to the examination.


After removing any object or garment containing metal, the patient is made to lie down on a bed, which through electronic control, will scroll until it is positioned between the poles of the magnet. In traditional machinery, the shape of the equipment itself could create problems for those suffering from claustrophobia. Today, however, even more modern, open-structure machines are available, where the problem does not arise.

During the examination, no form of collaboration is required from the patient, other than to relax and warn the staff through special tools in case of illness. The devices are, in fact, equipped with speakers and microphones to communicate with the doctor or staff. Special earphones are also provided to protect the rather loud and dry noises due to the emission of radio waves.

The average duration of the exam is generally between twenty and thirty minutes, even if the most modern techniques allow reducing the detection times. To improve image quality and make the diagnosis safer, the doctor may decide to inject gadoliniumMagnetic resonance imaging (MRI), a contrast agent generally free of side effects. 


Send Comment

Need a custom

We will write it for you.
Order now

Free Essay Examples

Free essays:

All you need to know about the epidemiology
Applications of BIOMEMS
All you need to know about metabolic pathways
Application to synthetic biology of CAD methods
Broadcasting: How to Be Good In Front of the Camera
Bioconjugates for the Drugs Delivery
Big data analysis in evolutionary biology
Brain-Computer Interface systems with EEG signals
Current challenges to the health of women
Current challenges to the health of Adolescence
Competitive strategies for modern businesses
Computed Tomography (CT) images and their reconstruction
Doppler ultrasound or simply eco Doppler
DNA extraction
Dynamic Systems Modeling with Machine Learning
Digital Imaging: What Is It?
Everything you need to know about the capital market
Entrepreneurship: Conceptual Framework for Evaluating Technology
Entrepreneurship: Opportunity and Design Thinking
Everything you need to know about enzymatic kinetics
Factors about The Savings Investment Process
Financial intermediaries and its Types
Fascias: all about fibrous membranes
Funding sources for non-profit organizations
Genetic regulation networks: modeling in biology
How to make your business survive at economic crisis
How to choose the topic of the senior capstone project
Healthcare technologies that help patients with better self-management
Introduction of Microfabrication techniques
Introduction to Writing a TV Script
Introduction to Journalism
Importance of modern trade policy
Journalism: What is News?
Journalism: Broadcast media and Television Presenters
Journalism: Sources of News
Journalism and Law
Kinetic models in biology and Related fields
Know about the different forms of traditional African dances
Know about the history of science
Latest technology trends
Microfluidics and microfluidic chips
Molecular Imaging
Modern conservatism in America
Modeling and simulation of genetic regulatory networks
Nanomedicines to target tumors
Nonlinear Dynamics in Biology & Biomedicine
NLS (Nonlinear System) - Revolutionary system in diagnostic medicine and therapy
Neural networks: what they are and what they are for
Overcoming Hiring Challenges for Nonprofit Organization
Principle of Optical coherence tomography (OCT)
Politics and Religion: Relations and Conflict Issues
Principle and parameters of Volumetric computed tomography
Role of technology in the modern business environment
Role of Homeostasis in Human Physiology
Role of a digital artist
Role of gender studies
Skills in Journalism: Effective Interview
Systems biology - An understanding the functioning of biological systems
Self-assembly for biological systems
School of American Ballet
The Structure of Interest Rates and the Yield Curve
The New Media: Emerging Trends
The technical basis of optical coherence imaging
The Principles of MRI Contrast agents
Ultrasound: physical principles and image formation
Understanding social entrepreneurship
Understand the importance of investigative journalism
Urban planning in the US
Various theoretical perspectives of sociology
Virtual reality, what it is and how it works
What is transition elastography?
What is lithotripsy and its types?
4 Facts about Origin of Mathematics!
5 techniques to create an animation
13 Best colleges for political science in the world
3d Model Of Building
All you need to know about the ACA Code of ethics
Architecture and Democracy: An Introduction
Architecture and Democracy: Democratic Values
Architecture and Democracy: Democratic Procedures
All You Need to Know About a Synthesis Essay
An essential guide to understanding Film Theory
Application of Artificial Intelligence in Cyber Security
Applications of electrical engineering
Augmented reality: what it is, how it works, examples
Advantages And Disadvantages Of Social Networking
All you need to know about Cryptography
Applications of astrophysical science
All you need to know about architecture engineering
Applications of geological engineering
Artificial intelligence and medicine: an increasingly close relationship
An insight into Computational Biology
ACA code of conduct
A Rose for Emily
Applications of Mathematics in daily life
Architecture mistakes to avoid
All you need to know about Toxicology
All you need to know about Holistic Medicine
All you need to know about linguistics
An introduction to Linguistics and its subfields
All you need to know about Anxiety disorder
All you need to know about Drones
A Brief Insight into Political Science
Assumptions related to feminism
All you need to know about Byzantine emperors
All you need to know about labour economics
An insight into xenobots -the first-ever robots
An ultimate guide about Biomaterials
A Comprehensive Introduction to the Mona Lisa
Analysis methods of Transport through biological membranes
An ultimate guide about biochemical reactions
Analysis of brain signals
Artificial Gene Synthesis
Application to synthetic biology of CAD methods
All you need to know about metabolic pathways
Applications of BIOMEMS
All you need to know about the epidemiology
How to Write a Personal Essay
Housing Needs in America
How to Write a Description Essay
How to Create an Excellent Scholarship Essay?
How to write a cause and effect essay
How to Hire the Best Essay Writing Service Provider?
How to Write a College Application Essay?
How to get the most out of your English lectures
How to write Expository Essay
How to succeed in your psychology class?
How to Write an Academic Essay in the Shortest Time?
History of Journalism
How Different Sectors are Using Artificial intelligence (AI)
How to write an informative essay
How to deliver persuasive essays?
How to Give a Convincing Presentation
How to write an essay on leadership?
Historical Art Still Around Today
Humanoid robot: what it is, how it works and price
History of Chemistry
Healthcare Advanced Computer Power: Robotics, Medical Imaging, and More
Healthcare AI: Game Changers for Medical Decision-Making and Remote Patient Monitoring
How to understand different types of English
How to Cope with Chronic Pain
How African American choreographers and dancers have influenced American dance
How mobile robot can do in logistics or in production
How To Become a Successful Entrepreneur
History of the Philosophy of Feminism
How is the climate changing?
How to Track Your Content Marketing ROI
How to Gun control In the USA?
Historical and contemporary role of labour in the modern world
How breast cancers are classified?
How the cells of our body communicate?
How the Lymphatic System Works?
How Digestive System Works
How to complete your capstone projects effectively?
How to write a research project
Healthcare technologies that help patients with better self-management
How to choose the topic of the senior capstone project
How to make your business survive at economic crisis
The Looming Energy Crisis in America
Top benefits of performance-based engineering
The More Languages You Know, The More Times You Are a Man
Things to consider while writing an Argumentative Essay
Top Ways to Improve Your Academic Writing Skills
Tips to Excel in Creative Writing
The origins of films in the early 19th century
Top career options in Architecture
The Elevator Pitch
Top finance trends 2020
The basic Structure and functionality of robots
The Way to Success
The election system of the President in the United States of America
Two-party System in United States of America
Top trends in urban design
The history and theory of African American filmmaking
Top benefits of creative writing
Tinnitus Guide: Common Symptoms and Treatment Options
The language of dance
The digital image processing management
Top famous politicians of the World
Top methods of political science!
The history of the feminist movement
The blood flow in cardiovascular system - Biofluid Mechanics
The best of Leonardo Da Vinci
The Structure and Function of Macromolecules
The structure of cell: a research on the bricks of the human body!
Tissue and organ construction: Adhesion and recognition between cells
The kinetics of the transformation processes
The Modeling of Biological Systems
Tips for writing a great thesis statement
The Defense mechanisms against infections
The impact of the technological innovations in medicine
Top journalism trends to know about
The relation between mass media & politics
Theranostics: Diagnosis and Care through Nanoparticles
The practical Applications of X-rays
The applications of Ultrasound in medicine
Transfer mechanisms of genetic information in Bacteria
The regulation of cellular metabolism in the diagnosis
The Principles of MRI Contrast agents
The technical basis of optical coherence imaging
The New Media: Emerging Trends
The Structure of Interest Rates and the Yield Curve
What is a Definition Essay?
What are diagnostic essays?
What is the relation between art structural engineering?
What is a Narrative Essay
What are robotics and intelligence systems?
What are the benefits of studying health sciences?
What is artificial intelligence and why it matters?
What is comparative Literature?
Why study neuroscience
What is Wi-Fi and how does it works
What is French history famous for?
What are Humanistic Studies?
What is covered in Biophysics?
What is modern journalism?
What is Virtualization? Benefits & Applications
What are modern public relations?
What is plasma physics?
What is teacher preparation?
What is rapid prototyping for 3D printing?
What is contemporary European Politics?
Why should you learn American Ballet?
What is engineering physics?
What is the purpose of African American Literature?
Ways to learn the Rhythm
What is digital art used for?
What are Enzymes and how do they work
Who is the father of political science?
Why Study Political Science - Job?
What is the Philosophy of Feminism?
What is a quantum computer?
Ways B2B Startups Streamline Their Conversion Strategies
Why do biomedical signals need processing?
What are the long term effects of climate change?
Why study labour relations
What is Holoprosencephaly?
What is antisocial disorder?
What are the important principles of evolution?
What is the cytoplasm and its function?
What is biopolymers?
What Makes a Good Leader
Women empowerment in modern generation
What is the history of political thought?
What is Gene recombination
What is synthetic biology
What is business cost analysis?
What is Inflation
What are the consequences of unemployment?
What is lithotripsy and its types?
What is transition elastography?