Examlex
Which of the following is not a substitution reaction?
Venography
A diagnostic procedure that involves imaging the veins by injecting them with a contrast dye to make them visible on X-rays.
Cholecystography
A diagnostic imaging procedure used to visualize the gallbladder, typically involving the use of a radiopaque contrast medium.
Tomography
Imaging by sections or sectioning, using any kind of penetrating wave, to create a three-dimensional image of the inside of an object.
Myelogram
A radiographic examination of the spinal canal and nerve roots by injecting contrast dye to detect abnormalities or injuries.
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