Sadler J.,Institute for Diagnostic Imaging Research |
Ahmed Z.,Institute for Diagnostic Imaging Research |
Shapoori K.,Tessonics Corporation |
Wydra A.,Institute for Diagnostic Imaging Research |
And 3 more authors.
Progress in Biomedical Optics and Imaging - Proceedings of SPIE | Year: 2013
The interest of our study is the in-vivo transcranial visualization of blood ow without removal of the skull. The strong attenuation, scattering, and distortion by the skull bones (or other tissues) make it difficult to use currently existing methods. However, blood ow can still be detected by using the ultrasonic speckle reections from the blood cells and platelets (or contrast agents) moving with the blood. The methodology specifically targets these random temporal changes, imaging the owing region and eliminating static components. This process analyzed over multiple exposures allows an image of the blood ow to be obtained, even with negative acoustic effects of the skull in play. Experimental results show this methodology is able to produce both 2D and 3D images of the owing region, and eliminates those regions of static acoustic sources as predicted. Images produced of the owing region are found to agree with the physical size of the vessel analogues, and also found to provide a qualitative measure on the amount of ow through the vessels. © 2013 SPIE.
Pantea M.A.,University of Windsor |
Maev R.G.,University of Windsor |
Malyarenko E.V.,Tessonics Corporation |
Baylor A.E.,Detroit Medical Center
Journal of the Acoustical Society of America | Year: 2012
Chest percussion is a traditional technique used for the physical examination of pulmonary injuries and diseases. It is a method of tapping body parts with fingers or small instruments to evaluate the size, consistency, borders, and presence of fluid/air in the lungs and abdomen. Percussion has been successfully used for the diagnosis of such potentially lethal conditions as traumatic and tension pneumothorax. This technique, however, has certain shortcomings, including limitations of the human ear and the subjectivity of the administrator, that lead to overall low sensitivity. Automation of the method by using a standardized percussion source and computerized classification of digitized signals would remove the subjective factor and other limitations of the technique. It would also enable rapid on-site diagnostics of pulmonary traumas when thorough clinical examination is impossible. This paper lays the groundwork for an objective signal classification approach based on a general physical model of a damped harmonic oscillator. Using this concept, critical parameters that effectively subdivide percussion signals into three main groups, historically known as tympanic, resonant, and dull, are identified, opening the possibility for automated diagnostics of air/liquid inclusions in the thorax and abdomen. The key role of damping in forming the character of the percussion signal is investigated using a 3D thorax phantom. The contribution of the abdominal component into the complex multimode spectrum of chest percussion signals is demonstrated. © 2012 Acoustical Society of America.
Bhuiyan M.,University of Windsor |
Malyarenko E.V.,Tessonics Corporation |
Pantea M.A.,University of Windsor |
Seviaryn F.M.,University of Windsor |
Gr. Maev R.,University of Windsor
IEEE Transactions on Biomedical Engineering | Year: 2013
Although clinical percussion remains one of the most widespread traditional noninvasive methods for diagnosing pulmonary disease, the available analysis of physical characteristics of the percussion sound using modern signal processing techniques is still quite limited. The majority of existing literature on the subject reports either time-domain or spectral analysis methods. However, Fourier analysis, which represents the signal as a sum of infinite periodic harmonics, is not naturally suited for decomposition of short and aperiodic percussion signals. Broadening of the spectral peaks due to damping leads to their overlapping and masking of the lower amplitude peaks, which could be important for the fine-level signal classification. In this study, an attempt is made to automatically decompose percussion signals into a sum of exponentially damped harmonics, which in this case form a more natural basis than Fourier harmonics and thus allow for a more robust representation of the signal in the parametric space. The damped harmonic decomposition of percussion signals recorded on healthy volunteers in clinical setting is performed using the matrix pencil method, which proves to be quite robust in the presence of noise and well suited for the task. © 1964-2012 IEEE.
Tessonics Inc. | Date: 2014-02-25
DVD players; ticket dispensers; accumulators, electric; accumulators, electric, for vehicles; actinometers; alidades; altimeters; ammeters; anemometers; high-frequency apparatus; testing apparatus not for medical purposes; remote control apparatus; electro-dynamic apparatus for the remote control of signals; monitoring apparatus, electric; sound recording apparatus; distillation apparatus for scientific purposes; diffraction apparatus microscopy; air analysis apparatus; sound transmitting apparatus; apparatus for fermentation laboratory apparatus; breathing apparatus, except for artificial respiration; breathing apparatus for underwater swimming; apparatus and installations for the production of x-rays, not for medical purposes; cash registers; electric apparatus for commutation; intercommunication apparatus; stills for laboratory experiments; projection apparatus; roentgen apparatus not for medical purposes; blueprint apparatus; blinkers signalling lights; stereoscopic apparatus; telephone apparatus; facsimile machines; phototelegraphy apparatus; igniting apparatus, electric, for igniting at a distance; acid hydrometers; salinometers; acidimeters for batteries; aerometers; barometers; anode batteries; galvanic batteries; batteries for pocketlamps; batteries for lighting; solar batteries; batteries, electric; balances steelyards; betatrons; binoculars; electronic tags for goods; magnetic tape units for computers; computer memories; encoded identification bracelets, magnetic; vacuum gauges; electrolysers; variometers; scales; weighbridges; camcorders; video cassettes; video telephones; video screens; viewfinders, photographic; plugs, sockets and other contacts electric connections; micrometer screws for optical instruments; viscosimeters; circuit closers; wavemeters; voltmeters; mechanical signs; switchboxes electricity; current rectifiers; jigs measuring instruments; gas testing instruments; gasometers; galvanometers; heliographic apparatus; hygrometers; hydrometers; weights; holograms; plotters; loudspeakers; range finders; densimeters; densitometers; optical goods; detectors; galena crystals detectors; smoke detectors; slide projectors; dictating machines; dynamometers; floppy disks; sound recording discs; disks, magnetic; optical discs; disk drives for computers; DNA chips; electronic notice boards; identification threads for electric wires; locks, electric; bells warning devices; alarm bells, electric; signal bells; acoustic conduits; mirrors for inspecting work; probes for scientific purposes; buzzers; buzzers, electric; measures; pressure measuring apparatus; simulators for the steering and control of vehicles; inverters electricity; pressure indicators; temperature indicators; incubators for bacteria culture; measuring instruments; mathematical instruments; levelling instruments; interfaces for computers; ionization apparatus not for the treatment of air or water; spark-guards; coaxial cables; fibre optic cables; cables, electric; calipers; calculating machines; pocket calculators; decompression chambers; cinematographic cameras; electronic pens visual display units; holders for electric coils; identity cards, magnetic; video game cartridges; encoded magnetic cards; protective helmets; cathodes; choking coils impedance; coils, electric; electromagnetic coils; computer keyboards; solenoid valves electromagnetic switches; wire connectors electricity; electronic agendas; mouse pads; magnetic encoders; calibrating rings; compact discs audio-video; compact discs read-only memory; comparators; computers; notebook computers; capacitors; contacts, electric; branch boxes electricity; distribution boxes electricity; connectors electricity; junction boxes electricity; accumulator boxes; lasers, not for medical purposes; neon signs; thermionic tubes; thermionic valves radio; amplifying tubes; magnetic tapes; videotapes; surveying chains; rulers measuring instruments; optical lenses; magnifying glasses optics; magnets; mouse computer peripheral; manometers; protective masks; materials for electricity mains wires, cables; material testing instruments and machines; diaphragms for scientific apparatus; metal detectors for industrial or military purposes; metronomes; rules measuring instruments; mechanisms for coin-operated apparatus; micrometer gauges; microprocessors; microscopes; microtomes; microphones; modems; monitors computer hardware; animated cartoons; terminals electricity; junction sleeves for electric cables; cases fitted with dissecting instruments microscopy; headphones; surveyors levels; verniers; sound recording carriers; magnetic data media; optical data media; sheaths for electric cables; identification sheaths for electric wires; weighing machines; furniture especially made for laboratories; shoes for protection against accidents, irradiation and fire; objectives lenses optics; fire extinguishing apparatus; electrified fences; limiters electricity; clothing for protection against accidents, irradiation and fire; clothing especially made for laboratories; ozonisers ozonators; octants; eyepieces; ohmmeters; wrist rests for use with computers; spectacle frames; oscillographs; plumb lines; mirrors optics; spectacles optics; sunglasses; goggles for sports; signalling panels, luminous or mechanical; radio pagers; electronic pocket translators; transmitters telecommunication; transmitters of electronic signals; switches, electric; gloves for protection against accidents; pyrometers; planimeters; plates for batteries; silicon wafers; compact disc players; cassette players; films, exposed; laboratory trays; semi-conductors; polarimeters; circuit breakers; converters, electric; telerupters; food analysis apparatus; diagnostic apparatus, not for medical purposes; distance measuring apparatus; teaching apparatus; time recording apparatus; distance recording apparatus; surveying apparatus and instruments; weighing apparatus and instruments; optical apparatus and instruments; apparatus and instruments for physics; chemistry apparatus and instruments; measuring apparatus; measuring devices, electric; observation instruments; precision measuring apparatus; instruments containing eyepieces; audio and video receivers; prisms optics; printers for use with computers; magnetic wires; wires, electric; conductors, electric; computer software, recorded; computer game programs; computer programs downloadable software; record players; processors central processing units; electronic publications, downloadable; control panels electricity; radar apparatus; vacuum tubes radio; voltage surge protectors; light dimmers regulators, electric; cell switches electricity; relays, electric; safety restraints, other than for vehicle seats and sports equipment; x-ray photographs, other than for medical purposes; rheostats; refractometers; refractors; saccharometers; light conducting filaments optical fibers fibres; signalling whistles; sextants; inductors electricity; fire alarms; signals, luminous or mechanical; sirens; scanners data processing equipment; smart cards integrated circuit cards; connections for electric lines; connections, electric; sonars; sound locating instruments; lighting ballasts; resistances, electric; spectrograph apparatus; speed indicators; alcoholmeters; protection devices for personal use against accidents; audiovisual teaching apparatus; optical glass; glass covered with an electrical conductor; anti-glare glasses; personal stereos; stereoscopes; sulphitometers; hands free kits for phones; spherometers; integrated circuits; printed circuits; counters; tachometers; television apparatus; telescopes; portable telephones; theodolites; thermometers, not for medical purposes; thermostats; transistors electronic; transformers electricity; protractors measuring instruments; battery chargers; electronic power transformers; telephone receivers; quantity indicators; electric loss indicators; light-emitting electronic pointers; clinometers; amplifiers; particle accelerators; sprinkler systems for fire protection; electric installations for the remote control of industrial operations; steering apparatus, automatic, for vehicles; balancing apparatus; video recorders; sound reproduction apparatus; tape recorders; data processing apparatus; oxygen transvasing apparatus; theft prevention installations, electric; time clocks time recording devices; optical character readers; dosimeters; chargers for electric batteries; sound alarms; sounding apparatus and machines; couplers data processing equipment; computer peripheral devices; anti-interference devices electricity; demagnetizing apparatus for magnetic tapes; acoustic couplers; anti-theft warning apparatus; alarms; readers data processing equipment; heat regulating apparatus; bar code readers; optical lamps; cameras photography; photometers; photovoltaic cells; chromatography apparatus for laboratory use; chronographs time recording apparatus; cyclotrons; chips integrated circuits; switchboards; distribution boards electricity; projection screens; radiology screens for industrial purposes; fluorescent screens; screens photography; exposure meters light meters; ducts electricity; galvanic cells; epidiascopes; ergometers. Apparatus for use in medical analysis; galvanic therapeutic appliances; apparatus for artificial respiration; apparatus for the treatment of deafness; physical exercise apparatus, for medical purposes; dental apparatus; surgical apparatus and instruments; resuscitation apparatus; dental apparatus, electric; physiotherapy apparatus; bed vibrators; hot air therapeutic apparatus; diagnostic apparatus for medical purposes; insufflators; traction apparatus for medical purposes; radiotherapy apparatus; apparatus and installations for the production of x-rays, for medical purposes; radiological apparatus for medical purposes; hearing aids for the deaf; hearing protectors; hernia bandages; dental burs; hot air vibrators for medical purposes; vibromassage apparatus; gastroscopes; hemocytometers; dialyzers; orthopaedic articles; surgical implants artificial materials; inhalers; injectors for medical purposes; incubators for medical purposes; obstetric apparatus; electric acupuncture instruments; cutlery surgical; heart pacemakers; catheters; compressors surgical; armchairs for medical or dental purposes; lasers for medical purposes; lamps for medical purposes; ultraviolet ray lamps for medical purposes; furniture especially made for medical purposes; breast pumps; urinals vessels; medical guidewires; pumps for medical purposes; thread, surgical; knives for surgical purposes; scissors for surgery; ambulance stretchers; boots for medical purposes; orthopaedic footwear; clothing especially for operating rooms; blankets, electric, for medical purposes; ophthalmometers; ophthalmoscopes; slings supporting bandages; gloves for medical purposes; cushions for medical purposes; heating cushions, electric, for medical purposes; belts for medical purposes; belts, electric, for medical purposes; aerosol dispensers for medical purposes; arterial blood pressure measuring apparatus; esthetic massage apparatus; massage apparatus; veterinary apparatus and instruments; medical apparatus and instruments; sprayers for medical purposes; receptacles for applying medicines; spirometers medical apparatus; thermal packs for first aid purposes; thermometers for medical purposes; trocars; x-ray tubes for medical purposes; protection devices against x-rays roentgen rays, for medical purposes; filters for ultraviolet rays, for medical purposes; radiology screens for medical purposes; electrodes for medical use; electrocardiographs. Arranging subscriptions to telecommunication services for others; import-export agencies; commercial information agencies; publicity agencies; cost price analysis; rental of advertising space; business auditing; computerized file management; demonstration of goods; opinion polling; marketing studies; business information; commercial information and advice for consumers consumer advice shop; business research; marketing research; business management and organization consultancy; business organization consultancy; business management consultancy; professional business consultancy; organization of exhibitions for commercial or advertising purposes; organization of trade fairs for commercial or advertising purposes; business appraisals; data search in computer files for others; sponsorship search; business management assistance; commercial or industrial management assistance; presentation of goods on communication media, for retail purposes; economic forecasting; auctioneering; sales promotion for others; publication of publicity texts; radio advertising; distribution of samples; direct mail advertising; advertising; on-line advertising on a computer network; advertising by mail order; television advertising; compilation of information into computer databases; business inquiries; systemization of information into computer databases; commercial administration of the licensing of the goods and services of others; administrative processing of purchase orders; public relations; procurement services for others purchasing goods and services for other businesses; outsourcing services business assistance; business efficiency expert services. Computer system analysis; chemical analysis; architecture; authenticating works of art; recovery of computer data; graphic arts design; computer virus protection services; technical project studies; engineering; installation of computer software; material testing; bacteriological research; biological research; mechanical research; physics research; chemical research; research and development of new products for others; technical research; calibration measuring; consultancy services in the field of computer hardware; computer software consultancy; architectural consultation; quality control; vehicle roadworthiness testing; updating of computer software; maintenance of computer software; conversion of data or documents from physical to electronic media; providing search engines for the internet; data conversion of computer programs and data not physical conversion; computer system design; rental of web servers; computer rental; rental of computer software; creating and maintaining web sites for others; surveying.
Tessonics Corporation | Date: 2013-04-15
A method is provided for assessment of quality of an adhesively-bonded lap joint, wherein the joint includes a first metal plate, a second metal plate and an adhesive therebetween. The method includes sending ultrasonic waves normally to the surface of a sample outside of the joint where the sample has a first sample metal plate with the same properties as does the first metal plate at an assessment point of the joint. Reflected waves from the sample joint as a reference waveform are recorded. Wideband ultrasonic waves are sent normally to the surface of the joint at the assessment point. Reflected waves of the ultrasonic waves from the joint are recorded. A waveform of the reflected waves from the joint and reference waveform are analyzed to determine an informative parameter. The informative parameter is compared with a threshold value to assess quality of the joint.