Medical Imaging

Medical image methods explained including MRI, X-rays and Bones Scans.

Bone Scan

A bone scan (also known as a Radio Isotopic bone scan) is used to detect areas of bone with an increased blood flow or increased bone turnover. These may be due to inflammation and infection, or fractures, lesions and tumors respectively.


An electromyograph (abbreviated to EMG) is a device used to measure and detect muscle conditions. It uses needle electrodes to discover informaiton about the muscles.


X-Rays were first discovered in 1895 by a Physicist named Roentgen. X-Rays are the same wave-like electromagnetic energy form as visible light rays, however X-Rays have a shorter wavelength which is not visible to the naked eye.


An Electrocardiogram (abbreviated to ECG) is a device used to measure the electrical activity of the heart. This can be useful in identifying heart problems.


An Echocardiogram is a test used to look at the structure and function of the heart. It uses ultrasound waves to display a moving image of the heart, similar to that used to look at unborn babies.

Bone density testing is used to diagnose Osteoporosis. It is also called Bone Densitometry or Dual-Energy X-ray Absorptiometry (DXA).

CT Scan

A CT scan (or cat scan) is an abbreviation of Computerised Tomography. CT scans show cross sectional images of soft tissues (muscles, tendons, ligaments, cartilage etc) as well as bone and calcific deposits.

MRI Scan

MRI stands for Magnetic Resonance Imaging. MRI scans were introduced in the 1980's and are now used frequently in the diagnosis of soft tissue injuries and other medical conditions.

Nerve Conduction

Nerve conduction studies are often run at the same time as an EMG. They are used to test the speed (velocity) and size of the signal sent along a nerve.

Ultrasound scan

An ultrasound scan is a way of looking at soft tissues within the body, using sound waves rather than radiation and so it is thought to be safer than other imaging methods.