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What is temporal subtraction in interventional radiology?
Temporal subtraction is a computer-assisted technique where an image obtained at one time is subtracted from an image obtained at a later time to enhance the pattern of contrast media.
What are the variables required for temporal subtraction?
The variables required for temporal subtraction are the same patient position, same anatomy, same radiographic distance, and same exposure factors.
What is the purpose of temporal subtraction in interventional radiology?
The purpose of temporal subtraction is to visualize certain information on an angiogram by removing non-essential structures, thereby allowing for better visualization of the opacified vessels.
What is the mask in the context of temporal subtraction?
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How does temporal subtraction enhance the visualization of contrast media?
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What are the different types of digital subtraction mentioned in the text?
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What is a diapositive mask?
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What is the basis for the theory behind the subtraction methods in radiography?
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How is the final subtraction print created in temporal subtraction methods?
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What must the generator be capable of for temporal subtraction methods?
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What is the advantage of using diapositive mask in subtraction methods?
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What is the purpose of creating contrast films at different energies (kVp) in the shortcut method?
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Why does a film with only one density not show an image?
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What are the various modes of temporal subtraction mentioned in the text?
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What is the definition of contrast in the context of radiography?
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What is the role of contrast films in the shortcut method for subtraction?
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