Who is Dr Kremkau?
Who is Dr Kremkau?
Dr. Kremkau is Emeritus Professor of Radiologic Sciences at Wake Forest University School of Medicine and is a Past President of the AIUM. The content, information, opinions, and viewpoints expressed in this article are those of the author.
What is the pulse-echo principle in sonography?
Students must be prepared to encounter both when they graduate. The fundamental pulse-echo principle that has been in use in conventional sonography for decades states that a pulse of ultrasound is sent into the anatomy to be imaged and the returning echo stream is displayed as a visible scan line.
What is virtual-beam sonography?
Newer, more sophisticated sonographic instruments operate on an entirely different principle, termed virtual-beam sonography. In this approach, a few broad, unfocused pulses are emitted to acquire the echo information and massive, retrospective, computational beam-forming is accomplished with graphic processing units (GPU’s).
What is a scan line in sonography?
In conventional sonography there is a one-to-one correspondence between the emitted pulse and the returning echo stream that appears as a scan line on the display (ignoring the detail that, in some cases, multiple scan lines can be presented from one emitted pulse, typically two or four).
