Angiography

Angiography is a type of radiologicalexamination that is done to image blood vessels in various parts of the body, including the heart, brain and kidneys, so as to determine whether the vessels are diseased, narrowed, enlarged or blocked altogether. After passing a catheter through an artery leading to the body area of interest, a contrast material is injected to highlight the vessels when x-rays are taken.

Nowadays, many catheter angiographic studies have been replaced by less invasive methods, such as computed tomography (CT) angiography and magnetic resonance (MR) angiography, that do not require that a catheter be inserted. Catheter angiography still is widely used in patients who may undergo surgery, angioplasty, or stent placement.

More information at-

http://www.radiologyinfo.com

Mammography

Mammography is basically a screening tool to screen women at high risk for breast cancer. It can detect ductal carcinoma in situ (even before there are symptoms or a lump present). The image of the breast is produced as a result of some of the x-rays being absorbed, while others pass through the breast to expose either a film (conventional mammography) or digital image receptor (digital mammography).

For more information on mammography and breast imaging check out-

Mammograms and Other Breast Imaging Procedures