Medical Technology

Radiography - single burst of X-ray

• 2d image

• Major use in osteology

Ct scan/cat

• For soft tissues: not bones

• Kidney and Gallstones

• Multiple scans for 3d visual.

DSA

• Radiopaque material injected into blood vessels

• Before and after images compared with computer

• image of blood vessel is shown on a monitor.

Ultrasound (US)

• High-frequency sound waves emitted by hand-held devices

• Safe, non-invasive & Painless

• Displayed on video monitor

• Used for fetal ultrasound and other organs.

MRI

• The body is exposed to high-energy magnetic fields

• Pulse of radiowaves used to generate an image on a video monitor

• reveals fine detail within soft tissue

PET

• Substance that emits positively charged particles is injected into the body

• releases gamma rays

• The camera detects gamma rays, and the computer generates an image displayed on the monitor.