A demodulator 101 demodulates modulated data into demodulated data, detects a demodulation error, and sets an erasure flag. A sensor such as a proximity sensor may be used to detect when the electronic device is in close proximity to a user’s head. An illumination unit projects onto a patient a line of light that is within the imaging plane projected by the ultrasound transducer into the patient. A double-caged platinum nanocluster complex is also disclosed, which comprises polyethylene glycol coated on the surface of a dendrimer caged platinum nanocluster complex. By detecting a potential web anomaly based on navigation history, a broader range of vulnerabilities may be detected. The gas expanded solvent may be maintained at a temperature below, at, or above a critical temperature of the expanding gas and at a pressure below, at, or above a critical pressure of the expanding gas.