jroque10-
Receptor Binding
C-11-dopamine
Picture a molecule locking into a receptor (like a key into a lock).
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Active Transport
I-131 (thyroid)
Imagine pushing a substance uphill using energy (ATP).
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Compartmental Localization
99mTc-labeled RBC (heart scan)
Picture red blood cells in a heart scan (like a compartment inside the heart).
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Ion Exchange
99mTc-phosphonate (bone)
Think of bone binding to radioactive particles, like glue sticking to it.
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Phagocytosis
99mTc-sulfur colloid (RES system)
Visualize cells eating particles like Pac-Man.
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Capillary Blockade
99mTc-MAA (lungs)
Picture particles stuck in small capillaries, like a clog in a pipe.
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Cell Sequestration
99mTc-RBC (spleen)
Imagine the spleen capturing damaged red blood cells.
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Chemotaxis
111-In-labeled leukocytes (infection)
Picture infection attracting phagocytes like a magnet.
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Passive Diffusion
99mTc-DTPA (brain)
Visualize a substance moving naturally from high to low concentration, like water flowing downhill.
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Metabolism
18-F-FDG (tumor activity)
Imagine cancer cells metabolizing glucose at a faster rate (like a factory running faster).
