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MERCK MANUAL
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Common Imaging Tests
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Common Imaging Tests
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Overview of Imaging Tests
Risks of Radiation in Medical Imaging
Radiation risk during infancy and early childhood
Radiation risk during pregnancy
Radiographic Contrast Agents
Radiopaque Contrast Agents
Side effects of radiopaque contrast agents
Kidney damage
Paramagnetic Contrast Agents
Side effects of paramagnetic contrast agents
Angiography
Procedure for Angiography
Uses of Angiography
Variations of Angiography
Arteriography
Venography
Digital subtraction angiography
Disadvantages of Angiography
Computed Tomography (CT)
Procedure for CT
Uses of CT
Variations of CT
CT angiography
Other variations
Disadvantages of CT
More Information
Magnetic Resonance Imaging (MRI)
Procedure for MRI
Uses of MRI
Variations of MRI
Functional MRI
Perfusion MRI
Diffusion-weighted MRI
Magnetic resonance spectroscopy
Magnetic resonance angiography (MRA)
Magnetic resonance venography
Echo planar imaging
Disadvantages of MRI
Problems related to the small enclosed space
Magnetic field effects
Reactions to the MRI contrast agent
X-Rays
Procedure for X-Rays
Uses of X-Rays
Mammography
Variations of X-Rays
X-rays with a radiopaque contrast agent
Fluoroscopy
Disadvantages of X-Rays
Radiation exposure
Other disadvantages
Positron Emission Tomography (PET)
Procedure for PET
Uses of PET
Heart
Brain
Cancer
Variations of PET
PET computed tomography (PET-CT)
Disadvantages of PET
Radionuclide Scanning
Procedure for Radionuclide Scanning
Labeling with a radionuclide
Tracking the radionuclide
Before, during, and after the procedure
Uses of Radionuclide Scanning
Variations of Radionuclide Scanning
Single-photon emission computed tomography (SPECT)
Disadvantages of Radionuclide Scanning
Ultrasound
Procedure for Ultrasonography
Uses of Ultrasonography
Variations of Ultrasonography
Doppler ultrasonography
Spectral Doppler ultrasonography
Duplex Doppler ultrasonography
Color Doppler ultrasonography
Disadvantages of Ultrasonography