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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: Ultrasound Med Biol. 2008 Mar 12;34(8):1200–1208. doi: 10.1016/j.ultrasmedbio.2008.01.001

Fig. 5.

Fig. 5

BMode image and pulse amplitude images from subject 2. (a) Transverse BMode image of the brain and skull. (b) Pulse amplitude image prior to hyperventilation with an end-tidal CO2 of 41.7 mmHg. (c) Pulse amplitude image during hyperventilation with an end-tidal CO2 of 20.7 mmHg. Positive pulse amplitude indicates displacement towards the US transducer during systole. Negative pulse amplitude indicates displacement away from the US transducer during systole.