Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT)

University of Toronto, Toronto, Ontario
What the facility does

Development of advanced instrumentation systems and measurement techniques for non-destructive inspection and non-invasive biomedical and dental diagnostic science and technologies.

Areas of expertise

The Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT) facilities and associated research activities offer opportunities in interdisciplinary research that encompass physics, mathematics, engineering, instrumental implementation and applications of novel laser-based analytical inspection and monitoring techniques, high-precision measurement methodologies, environmental sensor development, analytical, non-destructive and spectroscopic methodologies, signal processing and measurement science and imaging techniques for industrial and health sector applications.

Core areas of research are instrumentation science and associated technologies in the fields of:

  • Biomedical photoacoustic and thermophotonic technology and instrumentation development. Examples: Non-invasive laser-based technology for continuous or intermittent measurement of blood glucose (and blood alcohol content); photoacoustic radar (PAR) imaging; photothermal coherence tomography.
  • Non-destructive imaging and quantitative metrologies for semiconductor optoelectronic and nanoscale devices and material inspection using photocarrier diffusion waves. Example: Non-destructive imaging of semiconductor materials and photovoltaic solar cells.
  • Non-destructive testing and imaging technologies using thermal waves and laser ultrasonics.
  • Ultrasensitive spectroscopic sensor development for environmental pollution diagnostic applications.
Research services

Non-destructive and non-invasive imaging has been a growth discipline in the CADIPT. The main mission for the CADIPT is in strengthening Canada’s and Ontario’s competitiveness through the development of advanced instrumentation systems and measurement techniques for non-destructive inspection in industrial settings and non-invasive biomedical and dental diagnostics.

Since the 1980s, the CADIPT has emerged as a unique research center in diffusion-waves, photoacoustics and photothermics in Ontario, Canada and the world. Research activities are focused on development of novel advanced dynamic diagnostic and imaging modalities and instrumentation to address important quality control problems in industry and disease diagnosis in the health care sector. Current targeted areas are in the fields of inspection and non-destructive testing/imaging of clean energy conversion devices (e.g. photovoltaic solar cells, nano-optoelectronic devices), industrial manufactured products (steels, metal composites, automotive and aerospace components), non-invasive biosensor development (blood glucose, alcohol, cannabis, COVID-19), and biomedical and dental diagnostics with major focus on early detection of defects / disease using energy conversion concepts (optical-to-thermal, to-thermoelastic, or to-ultrasound) that impart exceptional signal dynamic ranges to instrumentation probes.

Research services include training for undergraduate and graduate students, and collaborations with national and international researchers, including visiting scientists and engineers, in the foregoing areas and disciplines. This research scope provides a tremendously wide spectrum of learning experience and cross-disciplinary training and defines the range of research opportunities that are a key mission of the CADIPT.

Sectors of application
  • Automotive
  • Clean technology
  • Energy
  • Life sciences, pharmaceuticals and medical equipment
  • Manufacturing and processing
Equipment Function
Lock-in carrierography imaging (LICI) near-infrared camera-based system (custom built) Generation of quantitative images of major transport parameters in semiconductor materials and optoelectronic devices.
Photocarrier radiometry (PCR) dynamic imaging system over large modulation frequency and optical ranges (custom built) Non-contact dynamic photoluminescence-based analysis of electrical behavior, electronic transport parameter and defect imaging of wide ranges of semiconductor materials and devices.
Dynamic thermography imaging (LITI) mid-infrared camera-based system and photothermal radiometry (PTR) set-ups (custom built) Non-invasive biomedical thermophotonic and photoacoustic imaging systems. Evaluation of thermophysical parameters, detection of various types of structural flaws / defects in a variety of materials including quantitative imaging analysis of manufactured components, multilayered objects and biomedical / dental disease imaging.
Wavelength-modulated differential photothermal radiometry (WM-DPTR) portable biosensors (custom built) Non-invasive and non-contacting measurements of blood glucose and alcohol content.
Truncated correlation photothermal coherence tomography (TC-PCT) mid-infrared camera-based imaging systems (custom built) Use pulsed laser, multi-frequency and radar principle. Novel dynamic thermal imaging modality that generates optical quality subsurface images of opaque or light scattering matter, based on optical absorption and 3D reconstruction of absorbers. 
Laser photoacoustic imaging systems (custom built) For minimally invasive endoscopy, with focus on catheter design for inspection of coronary artery walls. High contrast portable system for coronary disease diagnosis (coronary artery lipid and calcification vulnerable plaques) to complement x-ray angiography without the ionizing radiation safety issues.

 

  • Alcohol Countermeasure Systems (ACS)
  • Integran Technologies
  • Conavi Medical
  • Samsung Electronics (South Korea)
  • Advanced Processing Equipment Technology (APET) (South Korea)
  • Ontario Power Generation (OPG)
Title URL
Institute for Advanced Non-Destructive and Non-Invasive Diagnostic Technologies (IANDIT) https://iandit.mie.utoronto.ca