CT and MRI are two different types of medical imaging that create images of organs and tissues inside your body. While CT and MRI are similar in many ways, there are differences between them. Because of these differences, doctors might choose one imaging method over the other. Both CTs and MRIs are non-invasive and pain-free, and each can help your...

Prostate care is important to a man's overall health. Located between the bladder and the penis, this walnut-sized gland secretes fluid that nourishes and protects sperm. The urethra, which is a tube that carries urine from the bladder to the penis, runs through the prostate. Prostate problems can press against the urethra to restrict urination and...

Dementia is an umbrella term for a group of brain conditions that affect memory, thinking and social abilities severely enough to interfere with daily life. About 50 million people worldwide have dementia, according to the World Health Organization, and there are almost 10 million new cases each year. There are many different conditions under the u...

Your doctor may order an MRI, CT scan or other diagnostic tests to learn important information about a disease or injury, and to help in the diagnosis and treatment of the problem. Depending on your exact case, your doctor may request the use of a contrast dye to enhance the results of the test. While the tests and contrast dyes used are generally ...

Knee injuries can sideline professional and amateur athletes alike. The results of a new study suggest that a single magnetic resonance imaging (MRI) measurement can help doctors determine patients' risk for knee injuries associated with kneecap instability. The kneecap protects the knee and plays an important role in how the knee bends. It is a sm...

Because it does not use radiation to create images of tissues and organs inside a living body, magnetic resonance imaging (MRI) is one of the safest diagnostic tests used today. While relatively safe, MRIs do pose unique safety hazards for patients and others near or inside the magnetic resonance (MR) environment. To ensure safety and effectiveness...

When it comes to deciding which treatment is best for patients with chest pain and coronary heart disease (CHD), doctors will typically base the decision on how constricted the arteries serving the heart are. Doctors usually asses this by performing cardiac catheterization, which is an invasive procedure. The results of a new study show that a non-...

If you have ever undergone medical imaging, such as an MRI or CT scan, chances are good that you received contrast. MRIs (magnetic resonance imaging) and CT (computed tomography) are types of medical equipment that creates image of internal organs and structures. Contrast material enhances and improves the quality of these images. Contrast material...