Abstract: The skill of performing ultrasound is becoming a standard in medical education and clinical practice across a wide range of disciplines and clinical practices. Ultrasound is being used as a clinical tool by physicians, nurses, and other healthcare providers. A major limitation to the broad incorporation of ultrasound is the lack of qualified users and instructors. Simple and effective methods to teach the many new learners of ultrasound scanning are needed. Presently disclosed subject matter uses a visible color laser beam originating from an ultrasound probe itself or from a laser light pointer attached to an ultrasound probe which can penetrate a clear-gel phantom. The laser light is aligned with the direction of flow of the invisible ultrasound waves so that the learner will know where the ultrasound waves are hitting the anatomical target within the phantom gel.

Abstract: A modular fluid unit for cooling heat sources located on a rack, the modular fluid unit comprising: a heat exchanger in fluid communication a pump; and wherein the modular fluid unit is mountable within the rack and is configurable to be in fluid communication with a cold plate return manifold, a cold plate supply manifold, and an end-user fluid supply. A method for cooling electronic components in a rack, the method comprising: circulating a first liquid from a cold plate to one of a plurality of heat exchangers mounted within the rack; circulating a second liquid from a second liquid supply to the one of a plurality of heat exchangers; and transferring heat from the first liquid to the second liquid at the one of a plurality of heat exchangers.