摘要:
The invention relates to a method for determining the structural organization of a target object comprising the steps of: - transmitting a signal; - receiving reflection and/or transmission and/or diffraction and/or matter excitation signal or signals generated by structures and/or interfaces of the object in response to said signal, - extracting a phase signal of such response signal or signals; - determining discontinuities in such phase signal, such discontinuities being related to the spatial distribution of such structures and/or interfaces of the object. Also a corresponding device is disclosed.
摘要:
A description is given of a method of spectral analysis of a radio frequency ultrasonic signal reflected by a structure subjected to echographic examination, comprising the steps of: a) transmitting an ultrasonic excitation signal into a portion of said structure under examination; b) receiving a radio frequency response signal from said structure; c) applying a time-frequency transform to said radio frequency response signal, dividing the radio frequency response signal into a plurality of frequency bands; d) calculating a local spectral parameter from the values of the time-frequency transform.
摘要:
The invention relates to a method for determining local characteristics of a target object comprising the following steps: - transmitting a signal into said object; - receiving reflection and/or transmission and/or scattering and/or diffraction and/or matter excitation signal or signals generated by the object in response to said signal; - extracting the phase or a parameter correlated to the phase of such response signal or signals; - applying one or more mathematical operators to such phase or parameter to determine one or more local parameters; - identifying area or areas of the object having common propagation properties from one or more of such local parameters; - determining direct or indirect local quantitative information on the physical properties of the target from at least one of said local parameters or a combination thereof as a function of the type of propagation identified in such area or areas. Also a corresponding device is disclosed.
摘要:
A description is given of a method of spectral analysis of a radio frequency ultrasonic signal reflected by a structure subjected to echographic examination, comprising the steps of: a) transmitting an ultrasonic excitation signal into a portion of said structure under examination; b) receiving a radio frequency response signal from said structure; c) applying a time-frequency transform to said radio frequency response signal, dividing the radio frequency response signal into a plurality of frequency bands; d) calculating a local spectral parameter from the values of the time-frequency transform.
摘要:
The device for interstitial laser thermotherapy of tumors comprises an hollow needle (3) with a point (3A) for perforating a tissue (T) to be treated, and a light guide (9) which can be inserted in said hollow needle. The hollow needle is associated with a membrane (17) which is inflatable to form a balloon (P) into which the distal end (9A) of said light guide (9) can project, the membrane being inflated to create a cavity in the tissue to be treated into which laser radiation is guided by said light guide.