Daignostic Techniques Flashcards
How does a ultrasound works?
Echos refect of tissue boundaries
The density of the object determines how many waves are reflected back. Lighter color= more dense
Measures distance and size of tissue
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What is an ultrasound used for
Look for prenatal growth
Sic-filled sacks
Blind flow
How does a CT work
A CT scanner emits a series of narrow beams through the human body as it moves through an arc.
This data is transmitted to a computer, which builds up a 3-D cross-sectional picture of the part of the body and displays it on the screen.
What is a CT scanner used for
CT can see all part of the body
to diagnose disease or injury
How do X-rays work
A special machine emits (puts out) a small amount of ionising radiation. This radiation passes through your body and is captured on a special device to produce the image
What are x rays used for
Standard X-rays are performed for many reasons, including diagnosing tumors or bone injuries.
How do PET scans work?
The test uses a safe, injectable radioactive chemical called a radiotracer and a device called a PET scanner.
The scanner detects diseased cells that absorb large amounts of the radiotracer, which indicates a potential health problem
What are PET scans used for
help diagnose cancer and assess cancer treatment. They can also assess certain heart and brain issues with the scan.
How do MRIs work
passing an electric current through coiled wires to create a temporary magnetic field in your body. A transmitter/receiver in the machine then sends and receives radio waves. The computer then uses these signals to make digital images of the scanned area of your body
What are mri used for
Detect measure in soft tissues and internal organs
How do ECG work
Ten small sticky patches called electrodes are put on your arms, legs and chest. These are connected by wires to an ECG machine which picks up the electrical signals that make your heart beat
What are ECG used for
Looking at heart rate
What are EEG used for
Sleep disorders
Epilepsy
Depth of anesthesia
Coma/brain injury
How do EEG work
small sensors are attached to the scalp to pick up the electrical signals produced by the brain.
