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MRI (Magnetic Resonance Imaging Scan)Read the MRI (Magnetic Resonance Imaging Scan) article » What is an MRI scan?An MRI (or magnetic resonance imaging) scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures. The MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet. The magnet creates a strong magnetic field that aligns the protons of hydrogen atoms, which are then exposed to a beam of radio waves. This spins the various protons of the body, and they produce a faint signal that is detected by the receiver portion of the MRI scanner. The receiver information is processed by a computer, and an image is produced. The image and resolution produced by MRI is quite detailed and can detect tiny changes of structures within the body. For some procedures, contrast agents, such as gadolinium, are used to increase the accuracy of the images.
When are MRI scans used?An MRI scan can be used as an extremely accurate method of disease detection throughout the body. In the head, trauma to the brain can be seen as bleeding or swelling. Other abnormalities often found include brain aneurysms, stroke, tumors of the brain, as well as tumors or inflammation of the spine. Neurosurgeons use an MRI scan not only in defining brain anatomy but in evaluating the integrity of the spinal cord after trauma. It is also used when considering problems associated with the vertebrae or intervertebral discs of the spine. An MRI scan can evaluate the structure of the heart and aorta, where it can detect aneurysms or tears. It provides valuable information on glands and organs within the abdomen, and accurate information about the structure of the joints, soft tissues, and bones of the body. Often, surgery can be deferred or more accurately directed after knowing the results of an MRI scan. What are the risks of an MRI scan?/...Recommended Reading Related to MRI (Magnetic Resonance Imaging Scan)What is Morton's neuroma?A neuroma is growth (benign tumor) that arises in nerve cells. A Morton's neuroma is a swollen, inflamed nerve located between the bones at the ball of the foot (usually either the second or the third spacing from the base of the great toe). A Morton's neuroma is caused by compression of the nerve of sensation between the ends of the metatarsal bones at the base of the toes. What are symptoms of a Morton's neuroma?A Morton's neuroma causes a "burning" sharp pain on the bottom of the foot in the involved area. The pain of a Morton's neuroma can radiate to the nearby toes. The pain is usually increased by walking or when the ball of the foot is squeezed together and decreased with massaging. It may force a person to stop walking. How is a Morton's neuroma diagnosed?The diagnosis of a Morton's neuroma can usually be made by the doctor when the history ... Other Related MRI Scan ArticlesEmergency Contact for Sunnyvale
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Suggested Reading on MRI (Magnetic Resonance Imaging Scan) by Our Doctors
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Related Diseases & Conditions
119 articles-
Angina
- Angina is chest pain that is due to an inadequate supply of oxygen to the heart muscle. Angina can be caused by coronary artery disease or spasm of the coronary arteries. EKG, exercise treadmill, stress echocardiography, stress thallium, and cardiac catheterization are important tests used in the diagnosis of angina.
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Lower Back Pain
- There are many causes of back pain. Pain in the low back can relate to the bony lumbar spine, discs between the vertebrae, ligaments around the spine and discs, spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, and the skin covering the lumbar area.
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Bladder Cancer
- Treatment for bladder cancer depends on the stage of the disease, the grade of the tumor, and the type of bladder cancer. Options for treatment include surgery, radiation therapy, chemotherapy, and biological therapy.
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Bone Cancer
- In the U.S., more than 2,000 people are diagnosed with bone cancer every year. There are many types of bone cancer. The most common forms of bone cancer are osteosarcoma, Ewing's sarcoma, chondrosarcoma, malignant fibrous histiocytoma, fibrosarcoma, and chordoma. Pain is the most common symptom. Treatment usually involves surgery, chemotherapy, and radiation therapy.
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Cushing's Syndrome
- Cushing's syndrome, sometimes referred to as hypercortisolism, is a hormonal disorder caused by prolonged exposure to high levels of the hormone cortisol. Symptoms may include obesity, thinning arms and legs, a rounded face, and increased fat around the neck. Some causes of Cushing's syndrome is from taking glucocorticoid hormones such as prednisone for inflammatory diseases. Treatment for Cushing's syndrome depends on the cause.
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Diverticulitis (Diverticulosis)
- Diverticulitis is a condition in which diverticuli in the colon rupture. The rupture results in infection in the tissues that surround the colon. Diverticulitis symptoms include: abdominal pain, abdominal cramps, diarrhea, constipation, and bloating. Treatment methods include prescription medications, and in some cases, diverticulitis surgery.
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Elbow Pain
- Elbow pain is most often the result of tendinitis, which can affect the inner or outer elbow. Treatment includes ice, rest, and medication for inflammation. Inflammation, redness, warmth, swelling, tenderness, and decreased range of motion are other symptoms associated with elbow pain. Treatment for elbow pain depends upon the nature of the patient's underlying disease or condition.
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Eosinophilic Fasciitis
- Eosinophilic fasciitis is a skin disease that causes thickening and inflammation of the skin and fascia. Symptoms include redness, warmth, and hardening of the skin, as well as occasional tissue and joint pain. Treatment for eosinophilic fasciitis aims to eliminate inflammation through the use of aspirin, NSAIDs, and cortisone. Aggressive forms of eosinophilic fasciitis may require the use of immune suppression medications.
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Esophageal Cancer
- Esophageal cancer is a disease in which malignant cells form in the esophagus. Risk factors of cancer of the esophagus include smoking, heavy alcohol use, Barrett's esophagus, being male and being over age 60. Severe weight loss, vomiting, hoarseness, coughing up blood, painful swallowing, and pain in the throat or back are symptoms. Treatment depends upon the size, location and staging of the cancer and the health of the patient.
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Gallstones
- Gallstones are stones that form when substances in the bile harden. Gallstones (formed in the gallbladder) can be as small as a grain of sand or as large as a golf ball. There can be just one large stone, hundreds of tiny stones, or any combination. The majority of gallstones do not cause symptoms.
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Intestinal Gas
- Gas or "intestinal gas" means different things to different people. Everyone has gas and eliminates it by belching or farting (passing it through the rectum).
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Huntington's Disease
- Huntington's disease is the result of degeneration of neurons in areas of the brain. Huntington's disease is an inherited disorder. Early symptoms include mood swings, apathy, depression, and anger uncharacteristic of the individual. Judgement, memory, and other cognitive functions may become impaired. Presymptomatic testing is available for individuals who have a family history of Huntington's disease. Treatment includes medication and therapy for symptoms.
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Hodgkin's Disease
- Hodgkin's disease is a cancer of the lymphatic system with symptoms that include unexplained, recurring fevers, unexplained weight loss, itchy skin, and painless swelling of the lymph nodes in the neck, underarm, and groin. Treatment for adult Hodgkin's disease depends on the staging of the disease, the lymph nodes' size, and the health of the patient.
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Irritable Bowel Syndrome (IBS)
- IBS (irritable bowel syndrome) is a common gastrointestinal disorder involving abnormal gut contractions (motility) characterized by abdominal pain, bloating, mucous in stools, and irregular bowel habits with alternating diarrhea and constipation, symptoms that tend to be chronic and to wax and wane over the years. Treatment options include medication and lifestyle changes such as diet, exercise, and stress management to control symptoms. Also called spastic colitis, mucus colitis, nervous colon syndrome.
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Kidney Cancer
- There are several types of kidney cancer, including renal cell cancer (renal adenocarcinoma or hypernephroma), transitional cell carcinoma, and Wilms tumor. Symptoms of kidney cancer include blood in the urine, an abdominal lump or mass, chronic pain in the side, and tiredness. Treatment of kidney cancer--which may include surgery, arterial embolization, radiation therapy, biological therapy or chemotherapy--depends upon the stage of the disease and the patient's overall health.
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Knee Pain
- The knee joint is composed of three compartments and ligaments which stabilize the joint. Causes of knee pain may include injury, degeneration, infrequently infection and rarely bone tumors. Although routine x-rays do not revel meniscus tears, they can be used to exclude other problems of the bones and tissues. The knee joint is the most commonly involved joint in rheumatic disease, as well as immune diseases that affect various tissues of the body.
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Lung Cancer
- Lung cancer kills more men and women than any other form of cancer. Eight out of 10 lung cancers are due to tobacco smoke. Lung cancers are classified as either small cell or non-small cell cancers.
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Non-Hodgkin's Lymphoma
- Non-Hodgkin's lymphoma is cancer of the lymphatic system, a vital part of the body's immune system. Symptoms include swollen lymph nodes, fever, night sweats, coughing, weakness, chest pain, unexplained weight loss, and abdominal pain. Treatment depends on which type of non-Hodgkin's lymphoma you have, the stage of the cancer, your age, how fast the cancer is growing, and whether you have other health problems.
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Meniere's Disease
- Meniere disease (idiopathic endolymphatic hydrops) is an inner ear disorder with symptoms that include vertigo, tinnitus, hearing loss, and the sensation of ear fullness. Diuretics, anti-vertigo, anti-nausea and low salt diets are the primary treatment for Meniere disease. Surgery may be recommended if the vertigo cannot be controlled with medication.
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Morton's Neuroma
- A Morton's neuroma is an inflamed nerve between the bones at the ball of the foot. Symptoms include a burning, sharp pain on the bottom of the foot. Treatment involves resting the foot, wearing better-fitting shoes, ice packs, and cortisone injection.
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Multiple Myeloma
- Multiple myeloma is a form of cancer that develops in plasma cells, the white blood cells that make antibodies. Symptoms include bone pain, weakness, extreme thirst, nausea, frequent urination, and broken bones. Treatment of multiple myeloma depends upon the staging and symptoms of the disease.
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Oral Cancer
- The term oral cancer includes cancer of the mouth (oral cavity) and the back of the mouth (oropharynx). Red and white patches inside the mouth, bleeding, loose teeth, pain upon swallowing, a lump in the neck, earache, and a sore on your lip or in your mouth that won't heal are all symptoms of oral cancer. Treatment for oral cancer depends upon the staging of the disease and usually involves surgery, radiation therapy, or chemotherapy.
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Paget's Disease
- Paget's disease is a chronic bone disorder due to irregular breakdown and formation of bone tissue. Symptoms of Paget's disease include bone pain, headaches and hearing loss, pressure on nerves, increased head size, hip pain, and damage to cartilage of joints.
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Pancreatic Cancer
- Pancreatic cancer is a malignant tumor of the pancreas. Pancreatic cancer has been called a "silent" disease because early pancreatic cancer usually does not cause symptoms.
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Polycystic Kidney Disease
- Polycystic kidney disease (PKD) is characterized by numerous cysts in the kidneys. Polycystic kidney disease is a genetic disorder. There are two major inherited forms of PKD, autosomal dominant PKD, and autosomal recessive PKD. Symptoms include headaches, urinary tract infections, blood in the urine, liver and pancreatic cysts, abnormal heart valves, high blood pressure, kidney stones, aneurysms, and diverticulosis. Diagnosis of PKD is generally with ultrasound, CT or MRI scan. There is no cure for PKD, so treatment of symptoms is usually the general protocol.
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Stroke
- A stroke results from impaired oxygen delivery to brain cells via the bloodstream. A stroke is also referred to as a CVA, or cerebrovascular incident. Symptoms of stroke include: sudden numbness or weakness of the face, arm or leg. Sudden confusion, trouble speaking or understanding. Sudden trouble seeing in one or both eyes, sudden trouble walking, dizziness, or loss of balance, and/or sudden severe headache with no known cause. A TIA, or transient ischemic attack is a short-lived temporary impairment of the brain caused by loss of blood supply. Stroke is a medical emergency.
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Thoracic Outlet Syndrome
- Thoracic Outlet Syndrome is a condition where symptoms are produced from compression of nerves or blood vessels because the passageway through the neck and armpit is inadequate. Symptoms of thoracic outlet syndrome include neck, shoulder and arm pain, and numbness or impaired circulation to the extremities.
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Vertigo
- Vertigo is a feeling of spinning movement, and at times accompanied by nausea and vomiting occur. Vertigo is most often associated with an inner ear problem. The treatment for vertigo can be lifestyle changes and medication if necessary.
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Abdominal Pain
- Abdominal pain is pain in the belly and can be acute or chronic. Causes include inflammation, distention of an organ, and loss of the blood supply to an organ. Abdominal pain can reflect a major problem with one of the organs in the abdomen such as the appendix, gallbladder, large and small intestine, pancreas, liver, colon, duodenum, and spleen.
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