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European Radiology Experimental
Fig. 7 | European Radiology Experimental

Fig. 7

From: Respiratory level tracking with visual biofeedback for consistent breath-hold level with potential application in image-guided interventions

Fig. 7

Respiratory level without feedback. Respiratory level of a volunteer (F4) in the prone position, without visual feedback. Red line represents the initial level of breath-hold. The volunteer was given breathing instruction every 30 s and asked to return to the same respiratory level and maintain breath-hold for a couple of s, indicated by the short horizontal periods

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