No, ultrasound is non invasive, even when transmitting with a relatively strong power, it wouldn't cause leukemia.

No, ultrasonic wave is in fact vibration and can not cause leukemia

Thank you all dears,I am researching on some amino acids,when I  use ultrasonic waves with high frequency, after 10 min , the spectra corresponding to amino acids structure be disappear , this means that it can be harmful for  human protein and amino acids and can cause some sickness specially cancers, plz inform me and kindly discuss about it.

Ultrasonic waves is not a risk factor in the development of any type of cancers. Furthermore, even if the said frequency can destroy amino acids sequences in-vivo, in de-novo conditions the human body is programmed to repair such damages, which in fact happens all the time.

Thanks dear Manigreeva Krishnatreya for your kindness and replaying my question with a useful answer. 

Please remember that continuous wave ultrasound at the focal point of a transducer in a fluid medium like tissue culture or flask can generate fluid streaming and depending on the conditions cavitation which can be locally destructive. This is not relevant to pulsed wave ultrasound used medically for diagnostic studies in intact bodies. 

Thanks dear Jason Birnholz, It is very important point, since the ultrasound devices can work with both of continuous and pulsed waves mod. In fact, you have completed my question,  ultrasound devices are relatively inexpensive,therefor, use of  them are very common..

No. Ultrasound has been used safely to produce internal images of human body for over than half a century and no evidence has been documented showing these waves to cause cancer.