NON - INVASIVE ULTRASOUND TREATMENT OF SUBCOSTAL LESIONS

摘要

High Intensity Focused Ultrasound probe for noninvasive therapeutic treatment of subcostal lesions. A first array of ultrasound transducers produce a first ultrasound beam having at least one frequency f2 and focus the beam at a target volume in the lesion and a second array of ultrasound transducers produce a second beam having at least one frequency f1, which is less then f2, and focused at the same target volume such that interference between the first and second beams creates in the target volume an asymmetric ultrasound field having a larger negative pressure amplitude than positive one. The dimensions of said probe are such that most of the energy of the first beam passes through interspaces between ribs. A method of using the probe for non-invasive therapeutic treatment of subcostal lesions comprising a cavitation stage in which bubbles are generated in the target volume followed by a heating stage.