Institute Of Ultrasound Training Faisalabad Pakistan

Basic Physics Of Ultrasound Definition Ultrasound is the term used to describe sound of frequencies above 20 000 Hertz (Hz), beyond the range of human hearing. Frequencies of 1–30 megahertz (MHz) are typical  for diagnostic ultrasound. Diagnostic ultrasound imaging depends on the computerized analysis of reflected ultrasound waves, which non-invasively build up fine images of internal  body structures. The resolution attainable is higher with shorter wavelengths, with the  wavelength being inversely proportional to the frequency. However, the use of high  frequencies is limited by their greater attenuation (loss of signal strength) in tissue  and thus shorter depth of penetration. For this reason, different ranges of frequency  are used for examination of different parts of the body:  ■ 3–5 MHz for abdominal areas  ■ 5–10 MHz for small and superficial parts and  ■ 10–30 MHz for the skin or the eyes. Generation of ultrasou...

Dr Javaid Iqbal Warsi. Dr Mashhood Aslam Dar .Dr M Habibullah Anjum Dr Naveed Zaib              Dr Ishfaq Shakeel .Hakeem Abdullah Akram Gondal      Dr Javaid Iqbal Warsi      Prof.Dr.M.Habibullah Anjum & Dr Sabtain Ali               Dr Javaid Iqbal Warsi & Dr M Habibullah Anjum                                                                 Azeem ullah Azam                                                                      Talha Habib                         ...