Figure 6From: Magnetic resonance-guided focused ultrasound treatment of facet joint pain: summary of preclinical phaseThe ExAblate 2000® transducer and its division to separate elements. Red represents a working element and blue represents a disabled element. Apodization technique shapes the acoustic beam by switching off certain transducer elements; in this example, seven outer rings of transducer elements were switched off to create a narrower acoustic beam.Back to article page