Diagnostic imaging techniques

Imaging modalities[ edit ] a The results of a CT scan of the head are shown as successive transverse sections. Dermatology and wound care are two modalities that use visible light imagery.

Diagnostic imaging techniques

Imaging Studies X-Rays X-rays are waves of electromagnetic energy. They behave in much the same way as light rays, but at much shorter wavelengths. When directed at a target, X-rays can often pass through the substance uninterrupted, especially when it is of low density.

Higher density targets like the human body will reflect or absorb the X-rays.

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They do this because there is less space between the atoms for the short waves to pass through. X-rays are one of the most common radiology procedures. X-rays produce a still picture of bones and organs. Radiology is a specialized field of medicine that employs radiography and other techniques for diagnostic imaging.

Diagnostic imaging techniques

X-rays are especially useful in the detection of pathology of the skeletal system, but are also useful for detecting some disease processes in soft tissue.

Diagnostic imaging techniques help narrow the causes of an injury or illness and ensure that the diagnosis is accurate.

Diagnostic Imaging Techniques - X -Ray | CT Scan & MRI | St. George

These imaging tools let your doctor see inside your body to get a picture of your bones, organs, muscles, tendons, nerves, and cartilage. Your doctor uses these tools to determine if there are any abnormalities.

X-rays radiographs are the most common and widely available diagnostic imaging technique. Even if you also need more sophisticated tests, you will probably get an X-ray first. The X-ray or radiograph is produced by the transmission of energy.

A beam of high-energy photons is passed through the body, some of which are attenuated or blocked when they strike subatomic particles. In decreasing order of density, the principal densities visible in a radiograph are metal, bone, water including soft tissues such as musclefat, and air.

Risks of X-Ray There is very little risk with having one X-ray test. However, with repeated tests there is a risk that the X-rays may damage some cells in the body, possibly leading to cancer in the future.

The dose of X-ray radiation is always kept to the minimum needed to get a good picture of the particular body part being checked. Also, radiographers who take the X-ray pictures always wear lead aprons or go behind a protective screen when the X-rays are fired to avoid repeated exposure to X-rays.

Pregnant women, if possible, should not have an X-ray test as there is a small risk that X-rays may cause an abnormality to the unborn child. This is why women are asked before having an X-ray if they are, or might be, pregnant.A point-of-care imaging system could help reduce risks associated with transporting patients from an intensive care or neurosciences critical care unit to the CT scanner suite.

It could also offer high-quality imaging in the operating room. Diagnostic imaging techniques help narrow the causes of an injury or illness and ensure that the diagnosis is accurate.

These techniques include x-rays, computed tomography (CT) scans, and magnetic resonance imaging (MRI). Diagnostic imaging lets doctors look inside your body for clues about a medical condition. A variety of machines and techniques can create pictures of the structures and activities inside your body.

The type of imaging your doctor uses depends on your symptoms and the part of your body being examined. A radiologist is a doctor who specializes in imaging techniques.

Alternative Names

He or she is the person who usually reads (interprets) the images made during the test. The radiologist writes a report on the findings and sends the report to your doctor. Diagnostic Imaging Diagnostic imaging plays a critical role in initial cancer diagnosis, treatment planning, and palliative therapies through interventional techniques and cancer monitoring.

The Department of Radiology offers state-of-the-art clinical care and recently has expanded to enhance its services.


Radiology is a branch of medicine that uses imaging technology to diagnose and treat disease. Radiology may be divided into two different areas, diagnostic radiology and interventional radiology.

Imaging Techniques - an overview | ScienceDirect Topics