Physical understanding of an echo-Doppler test with voice-induced   vibration
  The physical understanding of a method of detecting mammalian cancer via vocalization during a normal echo-Doppler test is provided. The backscattered ultrasound frequency in the case of a vocal humming resonating in the chest wall is computed: the overall effect is that the signal/noise ratio could be easily improved at no cost. Clinical results are to appear separately elsewhere. 
Alessio D'Alessandro (1), Massimo Calabrese (2), Giuseppe Minetti (2),   Franco Rosso (3) and Alessandro Villa (2) ((1) Dipa...