99mTc-labeled hexamethylpropyleneamineoxime (HMPAO), and subsequent imaging with single photon emission computed tomographic (SPECT) brain scintigraphy. The top figures show anterior posterior and lateral views of a normal scan with uptake in the brain. The bottom figures (same sequence) show lack of brain perfusion and the "empty light bulb" and "hot nose" signs.
Courtesy of G Bryan Young, MD.
Graphic 76427 Version 4.0
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