What is a diagnostic medical imaging?
Diagnostic medical imaging concerns the process of obtaining images of the human body parts for investigation and diagnosis of the disease or injury. The process may include X -rays, magnetic resonance imaging (MRI), ultrasound, computed tomography (CT) or positron emission tomography (PET). Information derived from diagnostic medical imaging often enables health care workers to examine the interior of the patient's body in a non -invasive way. X -rays use short waves to reveal the film. Soft tissue does not absorb high energy waves, so they go through. The rays absorb thick objects such as bones and tendons. The resulting image shows less dense structures such as gray or black and dense structures such as lighter gray or white. Using powerful magnets and MRI radio waves, it uses magnetic properties atoms to create bright images. MRI is useful because the radiologist can adjust the test to provide the brightest image of the desired area. With this you can observe anything from bonds Po blood flow.
ultrasonic tests send high -frequency sound waves to the tissue and then use the returning echoes to create images of the area. Ultrasound are often used to assess the condition of the fetus during pregnancy. echocardiography , another form of ultrasound, is often used to explore heart function and blood flow through the heart. This type of diagnostic medical imaging can be used to diagnose many conditions, including thyroid tumors, bile stones or blood clots.
CT scan uses a rotating X -ray mechanism and a computer to provide cross -sectional images of organs or other parts of the body. This type of diagnostic medical imaging is commonly used to quickly distinguish injuries related to trauma in the chest or abdomen. It is also useful in determining the size, location and spread of tumors.
Scanning of the PET structure of three -dimensional imagesThe gamma rays emitted by an indicator introduced into the body. Radiotracer is distributed by the body and the resulting images reveal how the participating parts of the body work. Domestic animal scanning is commonly used to study brain in patients with epilepsy and for detailed examination of different areas of heart.
Some diagnostic medical imaging tests require the use of a contrast medium. These substances can be given by injection, enema or orally. Generally iodine or Barya -based contrast medium increases the visibility of the tissue examined. The doctor should carefully monitor the patient who has received contrast media to observe allergic reactions.