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US 8,376,947 B2Granted
Application of image-based dynamic ultrasound spectrography (IDUS) in detection and localization of breast microcalcifcation
AssigneeBioquantetics, Inc.
InventorsEdmond Rambod, Yacov Itzchak, Ari Shamiss, Daniel Weihs
Life of this patent
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Abstract
A method for the detection and localization of breast microcalcification through a precise method of ultrasound impacting and ultrasound frequency wave detection which will enable the system to detect not only if there is a microcalcification in the breast, but the precise location of the microcalcification and the mass of the microcalcification. The invention is also a method and system that provides bi-modal guided stimulation of a targeted mass within the breast to determine the location and nature of the microcalcification within the breast.
Claims33
A non-invasive method of identifying microcalcification in a breast of a human body comprising:
- a. positioning a disposable biocompatible, circular and compliant ring on the breast (ring) which contains four housings spaced approximately 90 degrees apart on the ring and each housing retaining an acoustic receiving sensor which is positioned within the ring;
- b. each respective breast-facing surface of each respective sensor housing is open and retains a thin and acoustically transparent biocompatible plastic film which separates the receiving sensor from directly contacting skin on the breast;
- c. each respective breast-facing surface of the ring around the location of the receiving sensors is covered with biocompatible adhesive material coupled with a removable protective material selected from the group consisting of paper or plastic material;
- d. the biocompatible adhesive material is exposed by removing the protective paper or plastic material;
- e. positioning the disposable ring on and around a human breast and adhering the ring onto the breast so that the sensor housings and the thin film are firmly coupled with the skin of the breast and located at positions approximately 90 degrees apart;
- f. utilizing a bi-modal Image-based Dynamic Ultrasound Spectrography system with “Imaging Mode” and “Stimulation Mode”;
- g. the Image-based Dynamic Ultrasound Spectrography system is switched to its “Imaging Mode”;
- h. an ultrasound imaging transducer is utilized to scan different segments of the breast and impact the breast with ultrasound imaging frequencies in the range of 1 megahertz (MHz) to 14 MHz to image the breast at each given time;
- i. an ultrasound B-mode gray scale image is created in real-time whereby ultrasound frequencies are transmitted towards specific segments of the breast and subsequently reflected from the specific segments of the breast towards the transducer;
- j. while the transducer is still in the imaging mode, the Image-based Dynamic Ultrasound Spectrography system is switched to its “Stimulation Mode”;
- k. the selected segment of the breast is stimulated by an ultrasound modulated scheme of non-invasive stimulation sequence in the form of a fixed band of frequencies or a derivative of which, as a swept band of frequencies, delivered by said ultrasound imaging transducer;
- l. when the stimulation sequence is delivered as a swept band of frequency, one signal generator provides incremented frequency ranges while another signal generator provides a fixed frequency so that due to instantaneous differences in the frequencies from the signal generator, certain acoustic radiation forces are generated proportional to the characteristic response frequencies of targeted microcalcifications that stimulate and vibrate the targeted microcalcifications;
- m. a single stimulation sequence is broken down into different segments so that the frequency scan occurs in a particular and controlled sequence called “one presentation” so that the swept band of frequencies can be applied over the desired frequency spans, thereby exerting the intended radiation force and in turn, creating the response in the targeted microcalcifications while minimizing the time for which each frequency span is introduced, which in turn increases the signal-to-noise ratio (S/N);
- n. when the stimulation sequence is delivered as modulated fixed band of frequencies, the data is acquired over a time interval wherein a fixed megahertz frequency is applied to the targeted microcalcifications and another variable and swept band of megahertz frequencies is incremented;
- o. in detection of stationary breast microcalcification, said modulated fixed band of stimulation frequencies is preferred wherein a first-hand estimate of the response is obtained and then a subsequent derivative of a swept band of megahertz frequencies is applied;
- p. in either the fixed band of frequency scheme of the swept band of frequency scheme, the stimulating signal is swept over a band of Hertz or kilohertz range frequencies and the frequencies are modulated on the megahertz ultrasound carrier frequency;
- q. as a result of stimulation, the microcalcifications produce response frequencies in the form of acoustic signals corresponding and specific to their mass density and structure and that are received by the receiving sensors positioned on the ring around the breast;
- r. utilizing an acoustic readout apparatus whereby certain frequencies are received by one or more of the acoustic receiving sensors positioned on the disposable ring;
- s. the detected frequencies received by each receiving sensor are compared and correlated with a predetermined map of peak frequencies corresponding to different microcalcification sizes, mass densities and structures;
- t. if a detected (received) frequency received by sensor/s correlates with a predetermined frequency in a the predetermined frequency signature map, the targeted site on the B-mode image is color-coded using a predetermined color scheme and the exact coordinates of the site within the breast is determined and co-registered with the B-mode image based on the readout from each sensor using certain triangulation techniques;
- and
- u. incorporating a fifth sensor within the ultrasound transducer in the Image-based Dynamic Ultrasound Spectrography system, the fifth sensor creating a reference axis in conjunction with the four acoustic receiving sensors, the fifth sensor used to create a reference axis so that the relative location of a detected site can be marked and co-registered to determine an exact three-dimensional location.
19 more elements
A non-invasive method to identify in a human breast comprising:
- a. placing a disposable and compliant ring around the breast and leaving the center portion of the breast available for scanning and stimulation by an ultrasound transducer;
- b. positioning four sensors on a disposable ring which is placed around and removably adhered to the breast, each sensor respectively coupled with a thin and acoustically transparent film which is firmly coupled to skin on the breast by a layer of biocompatible adhesive surrounding the thin film on the ring;
- c. utilizing a B-mode ultrasound transducer to scan the breast creating a gray-scale B-mode image of the area of interest with potential microcalcifications;
- d. a transmitted ultrasound imaging frequency band is used to cover a range of depths in the breast;
- e. once a B-mode image of the area of interest in the breast is obtained, for the stimulation purposes the total area of interest or a portion thereof in the B-mode image is marked;
- f. the selected area of interest is then targeted and stimulated by a swept band of frequencies generated by a proprietary sequence of specialized schemes delivered by said B-mode ultrasound imaging transducer;
- g. when a mass is present, it is stimulated by sequential frequency schemes resulting in emanating a characteristic response frequency proportional to its mass, size density and structure;
- h. monitoring the response in real time so that a spectrum including a peak response frequency is recorded and spectrally analyzed;
- i. having a detected peak response frequency correlated with a predetermined database of predefined peak frequencies to determine presence of a specific mass;
- j. if a detected response frequency or band of frequencies correlate with peak value or values in a predefined frequency signature map, the exact three-dimensional coordinates of the area from where the frequency or frequencies have been detected is marked, co-registered and integrated on the B-mode image and colored according to a particular predetermined color-coded scheme;
- and
- k. utilizing certain specialized positioning techniques, including but not limited to triangulation techniques, an exact three-dimensional position of an area of interest is determined based on signals received by receiving sensors and analyzers respectively, with an exact three-dimensional position of a targeted area co-registered and displayed on a B-mode image and recorded for future reference.
9 more elements
A non-invasive method of identifying microcalcification in a breast of a body, comprising:
- a. positioning a multiplicity of specialized acoustic receiving sensors on a sensor retaining apparatus so that the acoustic receiving sensors are spaced apart from each other;
- b. positioning the sensor retaining apparatus on and around the breast so that the multiplicity of acoustic sensors is positioned on and around the breast;
- c. utilizing a bi-modal Image-based Dynamic Ultrasound Spectrography system which has an Imaging Mode and a Stimulation Mode;
- d. utilizing the Imaging Mode of the Image-based Dynamic Ultrasound Spectrography system with an ultrasound imaging transducer to scan different segments of the human breast and impact the human breast with a given range of ultrasound imaging frequencies to image the breast at given times to thereby create an ultrasound image wherein ultrasound frequencies are transmitted toward specific segments of the breast and subsequently reflected from each specific segment of the breast toward the transducer;
- e. utilizing the Simulation Mode of the Image-based Dynamic Ultrasound Spectrography system with said ultrasound imaging transducer and stimulating selected segments of the breast by an ultrasound modulated non-invasive swept band of frequency schemes delivered by said ultrasound imaging transducer utilizing two modulated signals generated so that one signal provides the swept band of frequencies while the other signal provides a fixed ultrasound frequency so that due to instantaneous differences in applied frequencies, certain acoustic radiation forces are generated proportional to the characteristic response frequencies of targeted microcalcification so that the applied radiation forces stimulate and vibrate the targeted microcalcifications;
- f. a single stimulation sequence is broken down into different segments so that the frequency scan occurs in a particular and controlled sequence called “one presentation”;
- g. a stimulation signal is swept over a band of Hertz or kilohertz range frequencies and the frequencies are modulated on a megahertz ultrasound imaging frequency so that the stimulated microcalcifications produce response frequencies in the form of acoustic signals corresponding and specific to their mass density and that are received by the receiving sensors positioned on the ring;
- h. utilizing an acoustic readout apparatus so that certain frequencies are received by one or more of the sensors positioned on the disposable ring;
- and
- i. comparing and correlating the received frequencies with a predetermined map of peak frequencies corresponding to different mass densities and structures so that when a detected frequency correlates with a predetermined frequency in a frequency signature map, a targeted site on the image is color-coded in real-time utilizing a predetermined color scheme and exact coordinates of the site within the breast is determined and co-registered with the ultrasound image based on the readout from each sensor using certain specialized positioning techniques, including but not limited to triangulation techniques.
7 more elements
A non-invasive method of detecting in a breast of a body, comprising:
- a. positioning a multiplicity of acoustic receiving sensors on a sensor retaining apparatus so that the respective acoustic receiving sensors are spaced apart from each other;
- b. positioning the sensor retaining apparatus on and around the breast so that the multiplicity of acoustic sensors is positioned on and around the breast;
- c. utilizing a bi-modal Image-based Dynamic Ultrasound Spectrography system which has an Imaging Mode and a Stimulation Mode;
- d. utilizing the Imaging Mode of the Image-based Dynamic Ultrasound Spectrography system with an ultrasound imaging transducer to scan different segments of the human breast and impact the human breast with ultrasound imaging frequencies to image the breast at given times to thereby create an ultrasound image in real-time wherein ultrasound frequencies are transmitted toward specific segments of the breast and subsequently reflected from each specific segment of the breast toward the transducer;
- e. utilizing the Simulation Mode of the Image-based Dynamic Ultrasound Spectrography system with said ultrasound imaging transducer and stimulating selected segments of the breast by a non-invasive modulated swept band of frequencies wherein a fixed megahertz frequency is applied to a targeted microcalcifications and another different megahertz frequency is incremented over a band of frequencies to obtain a first-hand estimate of the targeted microcalcifications based on the differences between the fixed and incremented frequencies;
- f. a stimulation signal is swept over a band of Hertz or kilohertz range frequencies and the frequencies are modulated on a megahertz ultrasound frequency so that the microcalcifications produce response frequencies in the form of acoustic signals corresponding and specific to their mass density and structure and that are received by the acoustic receiving sensors positioned on the ring and read out by an acoustic readout apparatus;
- and
- g. comparing and correlating the received frequencies with a predetermined map of peak response frequencies corresponding to different mass densities and structures so that when a detected frequency correlates with a predetermined frequency in a frequency signature map, a targeted site on the ultrasound image is color-coded in real-time utilizing a predetermined color scheme and exact coordinates of the site within the breast are determined and co-registered with the ultrasound image based on the readout from each sensor using certain specialized positioning techniques, including but not limited to triangulation techniques.
5 more elements
A non-invasive method to identify in a human breast, comprising:
- a. positioning a multiplicity of acoustic receiving sensors on a sensor retaining apparatus so that the acoustic receiving sensors are spaced apart from each other;
- b. positioning the sensor retaining apparatus on and around the breast so that the multiplicity of acoustic sensors are positioned on and around the breast and leaving the center portion of the breast available for scanning and stimulation by an ultrasound transducer;
- c. utilizing the ultrasound transducer to image breast creating an ultrasound image of the area of interest with potential microcalcifications;
- d. the transmitted ultrasound imaging frequency band covers a range of depths in the breast;
- e. once an image of the area of interest in the breast is obtained by the ultrasound transducer, whether maintained stationary or moving over the breast, the total area of the breast or a segment thereof in the ultrasound image will be marked;
- f. the marked area of interest is then stimulated by a modulated swept band of frequencies generated by proprietary sequence of specialized schemes delivered by said ultrasound transducer;
- g. when a microcalcification is present, it is stimulated by a sequence of modulated frequency schemes resulting in emanating a characteristic response frequency proportional to its size, mass and structure;
- h. monitoring a response in real time so that a spectrum including a peak response frequency is recorded and spectrally analyzed;
- and
- i. having a detected peak response frequency correlated with a predetermined database of peak response frequency maps to determine and verify presence of a specific mass.
7 more elements
Dependencies are inferred from the claim text.