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MERCK MANUAL
Consumer Version
HEALTH TOPICS
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Quick Facts: Special Subjects
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Common Imaging Tests
Angiography
What is angiography (angiogram)?
Why would I need angiography?
What happens during angiography?
Before the test
During the test
After the test
What are the risks of having angiography?
Radiation
Other problems
Computed Tomography
What is computed tomography (CT scan)?
Why would I need a CT scan?
What happens during a CT scan?
Before the scan
During the scan
After the scan
What are the risks of having a CT scan?
Radiation
Other problems
Magnetic Resonance Imaging (MRI)
What is MRI?
Why would I need an MRI?
What happens during an MRI test?
Before the test
During the test
After the test
What are the problems with MRI tests?
Slower than CT scans
Small, enclosed space
Problems with the magnetic field
Reactions to the contrast agent, if used
X-Rays
What is an x-ray?
Why would I need an x-ray?
What happens during an x-ray?
Before the x-ray
During the x-ray
After the x-ray
What are the risks of having x-rays?
Radionuclide Scanning (Nuclear Scan)
What is a radionuclide scan?
Why would I need a radionuclide scan?
What happens during a radionuclide scan?
Before the test
During the scan
After the scan
What are the risks of radionuclide scanning?
Radiation
Other problems
Ultrasound
What is ultrasound?
Why would I need ultrasound?
Special types of ultrasound for heart and blood vessel problems
What happens during an ultrasound?
Before the test
During the test
What are the problems with ultrasound?
Positron Emission Tomography (PET)
What is positron emission tomography (PET scan)?
Why would I need a PET scan?
What happens during a PET scan?
Before the test
During the test
After the test
What are the risks of having a PET scan?
Radiation
Reactions to the tracer
Tobacco Use
Smoking
Why is smoking tobacco bad for my health?
What about e-cigarettes?
What if a child swallows nicotine?
What are the effects of smoking?
Immediate effects
Long-term effects
Withdrawal symptoms
Should I talk to my doctor about my smoking?
Chronic Fatigue Syndrome
Chronic Fatigue Syndrome
What is chronic fatigue syndrome?
What causes chronic fatigue syndrome?
What are the symptoms of chronic fatigue syndrome?
How can doctors tell if I have chronic fatigue syndrome?
How do doctors treat chronic fatigue syndrome?
Surgery
Surgery
What is surgery?
Keyhole surgery
Why do doctors do surgery?
How is pain controlled during surgery?
What happens before, during, and after surgery?
Getting ready for surgery
During surgery
After surgery
How safe is surgery?
