Abstract: A drilling tool for determining a real-time image of a borehole during drilling of the borehole, comprising: a drillstring, an acoustic caliper attached to the drillstring including: an acoustic transmitter that transmits a transmitted acoustic pulse, and an acoustic receiver that receives a reflected acoustic pulse, a well positioning device that determines a depth and accurate position of the acoustic caliper in the borehole, and a Programmable Logic Controller (PLC) that determines, in real-time, the time of flight of the acoustic pulse between transmitting the transmitted acoustic pulse and receiving the reflected acoustic pulse of the acoustic caliper, determines, in real-time, a distance between the acoustic caliper and a borehole wall based on the time of flight, and determines, in real-time, an image of the borehole wall during drilling of the borehole based on the distance as function of the depth and accurate position.