Ultrasound systems and methods of identifying fluids in body regions using the same

A method for determining a presence of fluid in a body region, the method comprising:

• emitting ultrasound radiation at a frequency below about 15 MHz into a body region from an ultrasound transducer having a plurality of ultrasonic elements, wherein the ultrasound radiation has a dynamic range value that is less than about one third of a maximum dynamic range value of the ultrasound transducer, and wherein the maximum dynamic range value includes a maximum number of the plurality of ultrasonic elements in the ultrasonic transducer to individually receive returned ultrasound radiation;
• controlling one or more properties of the ultrasound radiation with a computing device operably coupled to the ultrasound transducer by actuating one or more operational programs having machine readable and executable instructions for controlling the ultrasound transducer, wherein the one or more operational programs include at least one B-line mode operational program and at least one non-B-line mode operational program, wherein the at least one B-line mode operational program includes machine readable and executable instructions for the plurality of ultrasonic elements for causing the ultrasound transducer to have a focal point about 1 mm to about 10 mm above a proximal surface of an interrogation site in the body region;
• receiving returned ultrasound radiation from the body region with the ultrasound transducer;
• automatically determining, via a machine vision system, a combination of parameters having a signal-to-noise ratio of at least 2 and a sharpness ratio of at least 0.2;
• and
• generating, with the computing device, an ultrasound echo map with the returned ultrasound radiation that includes one or more B-lines having the determined combination of parameters.