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Friday, December 22, 2017

Special PET Scan Instructions for People with Diabetes


Positron emission tomography (PET) is a nuclear medicine imaging test conducted to provide doctors with accurate basis for diagnosing a variety of diseases. It involves the injection of a special form of glucose, called 18-F fluorodeoxyglucose (18-F FDG) or simply FDG, to aid in imaging the condition of the tissues and organs. 

Because FDG is sugar, the test results are likely to be affected if the person undergoing it has diabetes, a condition characterized by high blood sugar levels. The blood will not take up FDG efficiently since it already contains too much sugar. This, however, doesn’t mean that diabetics can no longer have a PET scan. They only need to do the following preparations to make sure that the results of the test will be reliable. 

Friday, December 15, 2017

MRI Scan and Neurological Disorders: Can Machine Really Detect Issues?



Mixed martial arts competitions have never been more popular throughout the United States and the rest of the world. In fact, to say that the combat sport gets the adrenaline pumping is an understatement. However, what spectators find exciting and entertaining can prove to riskier than what MMA fighters and their trainers may initially believe—and we aren’t just talking about getting beaten up. There is also a significant risk of neurological damage, which may lead to neurodegenerative disorders and movement dysfunction.

One of the most difficult aspects of diagnosing and treating neurodegenerative disorders is the fact that many symptoms are quite subtle, especially in the early stages. This often leads to delayed treatment. Fortunately, medical researchers may have found a way to detect neurodegenerative disorders early on with the help of MRI technology.

Wednesday, October 25, 2017

PET Scan: Understanding Brain Function and Diagnosing Memory Disorders


Positron emission tomography or PET uses sophisticated computer analysis to provide accurate images of the brain. Unlike MRI or CT images, a PET scan provides a detailed image of one's brain function instead of its structure. PET works by injecting radioactive variants of molecules like glucose, oxygen, neurotransmitters, and hormones in the bloodstream to be carried throughout the body. A PET scanner then detects these radioactive molecules that emit radiation, allowing for the study of its uptake and distribution in the brain. In a PET image, the patches where accumulated radiation is highest (active) is typically red and lowest (decreased activity) is usually colored blue.

PET Imaging Used for Diagnosing Memory Disorders

While MRI and CT can give detailed images of the brain's structure, PET imaging are better at detecting functional abnormalities in the brain. Specialists say that it's even possible to detect these abnormalities very early in the course of the disease and before any anatomical changes occur. The decrease or increase in glucose metabolism at a cellular level are said to be the results of disorders that start with functional abnormalities.

Friday, October 20, 2017

Using MRI in Detecting and Assessing Slowly Progressing Conditions


Because of how it progresses, facioscapulohumeral muscular dystrophy or FSHD is among several disorders that are difficult to detect using current testing methods. This is likely due to the fact that severity, age of onset, and progression of this hereditary muscular disorder vary greatly. Some might notice symptoms in their teens, but studies show muscle weakness can start at infancy. Other people, on the other hand, only have mild FSHD that they don't notice its symptoms at all and are only diagnosed after a more affected family member has been diagnosed with FSHD.

People experience various symptoms depending on how mild or strong the disease is. Symptoms range from abdominal muscle weakness, mild hearing loss and abnormalities of the retina to facial weakness, hip weakness and shoulder weakness, among a host of other symptoms.

Wednesday, August 30, 2017

Tracking Repeated Concussion Injuries Among NFL players with PET Scans

A wide variety of tests can be used to determine if a patient has brain injury, and PET (positron emission tomography) is one of them. PET scanning technology relies on the fact that the brain stores glucose, and by tagging the glucose inside the brain with a radioactive tracer, the PET scanner can identify the areas of the brain where glucose is underutilized.

With PET scans being a useful imaging tool for brain injuries, experts now believe that it can be an indispensable tool in monitoring the brains of NFL players and athletes in other contact sports. Recently, scientists discovered that they can use PET scans to look for brain injury and repair markers in the brains of active and retired NFL players.

According to Jennifer Coughlin, assistant professor of psychiatry and behavioral sciences at Johns Hopkins University, the scientists believe that in PET scans, they have “a useful tool to monitor the brains of NFL players and athletes in other contact sports.”

Wednesday, August 23, 2017

MRI and Its Many Applications: Using MRI in Diagnosing Blood Clots


Deep vein thrombosis, more popularly known as a blood clot, is a type of clump that occurs when the blood hardens and turns solid or semi-solid. It can be caused by poor dietary habits, injuries, or an infected body part. It causes vascular obstruction, and could prove dangerous if not treated in a timely manner. Blood clot can be present in different areas of the body like the arm, leg, heart, abdomen, and lungs.

How physicians diagnose blood clots

When diagnosing a blood clot in a patient, the physician considers the individual’s risk factors, symptoms, and test results of the imaging method used to see the clot. Possible imaging tools used to detect blood clots include Doppler ultrasound, veneography, MRI (magnetic resonance imaging), MRA (magnetic resonance angiography), and CT (computerized typography) scans, and the D-dimer blood test.

Tuesday, July 11, 2017

Cancer Immunotherapy Responses and How a PET Scan Can Predict Them

Many years ago, cancer is almost impossible to cure. Those who have been diagnosed with it almost immediately lose hope because of the absence of reliable remedy. Today, various treatment methods are now accessible. The latest and arguably the safest and with least impact on healthy cells is immunotherapy. This involves directly or indirectly using the immune system to fight off cancer cell growth.