Virtual image formation method for an ultrasound device

A method for guiding a probe tip to a subdermal site comprising:

• guiding a probe through a probe guide of an ultrasound device, the probe terminating in the probe tip, the probe guide including a first end and a second end, the first end being closer to a skin contacting surface of the ultrasound device than the second end, the ultrasound device comprising an ultrasound transducer in communication with a processor, the ultrasound device further comprising a detector for determining the location of a target that is associated with the probe, the detector being in communication with the processor;
• configuring the processor to determine the location of a virtual probe tip from the location of the target as determined by the detector and communicated to the processor, wherein the processor executes instructions to determine the location of the virtual probe tip, the instructions comprising a set of correlation factors that correlate the location of the virtual probe tip as determined by the processor with the subdermal location of the probe tip;
• forming a sonogram of the subdermal site on a monitor from information communicated to the processor from the ultrasound transducer;
• and
• forming an image on the sonogram of the location of the virtual probe tip as determined and correlated by the processor from information communicated to the processor from the detector.