Understanding Nuclear Magnetic Resonance Imaging (MRI)

When the patient is placed inside the MRI, protons will align parallel or antiparallel with the primary magnetic field. There will be more protons in parallel (low energy) than in anti-parallel (high energy). Protons will spin on an axis of the primary magnetic field and will perform a motion that resembles wobbling, this is called precession. The precession frequency is dependent on the strength of the external magnetic field and its rate is described in the Larmor frequency; the stronger the magnetic field, the higher the precession frequency. Protons that align and process together are known as in phase, those that process separately are known as out of phase.

An MRI uses computer-generated radio waves and a strong magnetic field to produce a detailed image of the brain. “MRIs are helpful in the diagnosis of tumors, eye diseases, infections, inflammation, and damage due to head injury” (Hill 2008). When getting an MRI, you lay on a table that slides into a tube, and they use computer-generated radio waves and a very strong magnetic field to see images of the brain. This test will allow the doctor to see two and three-dimensional images of your brain.

Magnetic Resonance Imaging (MRI) is a way of medically imaging the body with the use of a magnetic field and radiofrequency waves. (1) As image quality of MRI continues to improve, more MRI exams are being ordered. Increasing MRI exams leads to increased wait times. Due to current wait lists, the health status of patients may decrease, influencing the type of treatment the patient will require once removed from the wait list. (7) The advances in technology have increased in the past decade, with MRI procedures are vastly growing to provide superior diagnostic quality compared to other modalities. New technologies are also allowing for faster scan times and further increased image quality. (9)

Magnetic resonance imaging (MRI) is a test that lets your health care provider see detailed pictures of the inside of your body without using X-rays. Instead, strong magnets and radio waves work together in a magnetic field to form very detailed and sharp images. The images are viewed on a TV monitor in two- and three-dimensional form. The magnets and radio waves are harmless.

Magnetic Resonance Imaging is also known as MRI. This computerized device is used for scanning the

Have you ever gone to the doctor and ended up needing to get an MRI? If you have, did you know what it was or what it was meant to do? If you knew what it was for, you probably didn’t know the science behind how it worked.

When physicians order a Magnetic Resonance Scan, they usually use their patients’ signs and symptoms as clues to determine what specific information they are looking for in the scan results.

NMR is a form of spectroscopy that utilizes external magnetic fields and signals to identify the chemical structure of organic molecules, creating a gradient image. Through applying an applied Radio Frequency, the proton is able to flip into higher energy states, and then relax. This process is recorded by a NMR Spectrometer, and the difference in energy provides it with a certain NMR Signal. The difference in the magnetic fields of the allows for a gradient image of the area. There are various types of imaging that are useful for fast imaging or 3D imaging such as Gradient-Echo Imaging or Volume Imaging. Some other applications of the same principles that apply to MRIs mainly relate to the identification of organic molecules such as Protein Folding and Drug Development. Although MRI is a relatively safe and harmless process as opposed to other forms of imaging such as X-rays, certain aspects still pose a risk to patients

When radiological examination is recommended by a physician, the expected benefit received from the test will outweigh the potential radiation risks involved. MRI uses strong magnetic fields to align atomic nuclei (usually hydrogen protons) within body tissues, then uses a radio signal to disturb the axis of rotation of these nuclei and observes the radio frequency signal generated as the nuclei return to their baseline states.MRI scans do not expose patients to radiation, but the high force magnetic field used can cause significant problems if proper precautions are not met. Magnetic force used can cause metallic devices or implants to malfunction or be dislocated with the body. Images can be distorted by metal and electronic objects outside the body, due to interfere with the magnetic field of the MRI unit. Over exposure and unnecessary use of these imaging modalities can cause health risk.

Magnetic resonance imaging (MRI) uses the body's natural magnetic properties to produce detailed images from any part of the body. For imaging purposes the hydrogen nucleus (a single proton) is used because of its abundance in water and fat. When the body is placed in a strong magnetic field, such as an MRI scanner, the protons' aces all line up. This uniform alignment creates a magnetic vector oriented along the axis of the MRI scanner. When additional energy in the form of a radio wave is added to the magnetic field, the magnetic vector is deflected. The radio wave frequency that causes the hydrogen nuclei to resonate is dependent on the hydrogen and the strength of

Unlike CT scans, MRI works without radiation. The MRI tool uses magnetic fields and a computer to take high-resolution pictures of the bones and soft tissues. It has the ability to diagnosis problems such as tumors, bleeding, tissue damage, and can provide additional information from other commonly used scans such as CT scans and X-Ray. It is the method of choice for the diagnosis of certain diseases, disorders, and injuries. MRI is safe for most

The human body is mostly made up of molecules of water (H20) .The body is made up of 60% hydrogen atoms. The nuclei of hydrogen atoms are composed of one proton (a subatomic particle containing a positive charge). These protons are very sensitive to magnetic fields, and when they begin to spin they produce their own magnetic field. This means that the nucleus of a hydrogen atom acts like a little magnet. When the human body is exposed to a large magnetic field, these protons line up. A similar phenomenon occurs when compass needles line up when surrounded by a magnetic field. However a proton goes through a

Magnetic resonance imaging (MRI) is a noninvasive test which uses radio waves to develop a concise three dimensional images of body’s organs, skeletal system and tissues. MRI testing assist with diagnosis of aneurysms, disorders in the eye and ear, multiple sclerosis, spinal cord injuries, tumors, and brain traumas. In addition, t MRIs to identify brain’s anatomy, language control, movement control, heart, blood vessels, internal organs, bones, joints and breast. Factors that can cause error in diagnosis includes any metal devices, electronic devices, tattoos, pregnancy, kidney problems and lung problems (Mayo Clinic, n.d, 2017).

The MRI is possible in the human body because our bodies are filled with small biological ?magnets?, the most abundant and responsive of these are the protons. The principal of the MRI is that it utilizes the random distribution of protons, which have basic magnetic properties. Once the patient is placed in the cylindrical magnet, the diagnosis process follows 3 steps. First, MRI

An MRI (magnetic resonance imaging) is a scan that uses a system of techniques, involving magnetism, radio waves and a computer to generate detailed images of the human body. Essentially, it is a tube encased by a large circular magnet. The patient would be placed on a moveable bed, which is then inserted into the tube. The magnet then creates a strong magnetic field that aligns the protons of hydrogen atoms. These hydrogen atoms come from the human body, which is 50-65% H2O. These atoms are exposed to a beam of radio waves. This spins the various protons of the body. As they spin, they produce a slight