TAEUS can be used in oncology as well. It is an evolution of Nexus 128. The only competitor to it (as of 2016 and to my knowledge) is LAZR from Fujifilm, which cannot be used on humans.
Currently, there are two commercially available preclinical photoacoustic im- aging systems as shown in Figure 3: Vevo LAZR (Fujifilm VisualSonics, Toronto, Canada; technology licensed from Seno Medical Instruments, San Antonio, Tex) and Nexus 128 (Endra, Ann Arbor, Mich; technology licensed from OptoSonics, Oriental, NC) (7,44– 49). Vevo LAZR uses high-frequency handheld transducers ranging from 9 to 55 MHz, which limits its use to small-animal imaging, while the Nexus 128 employs a 5-MHz hemispherical transducer array for photoacoustic CT which is potentially suitable for clinical imaging (however, currently not cleared by FDA for human use).