Advanced tissue-mimicking optical phantoms

In modern biomedical optics, the demand for increasingly realistic, application-specific reference materials has given rise to a new generation of advanced tissue-mimicking optical phantoms. These phantoms go beyond traditional homogeneous standards, incorporating complex internal structures, multi-layer compositions, or customized optical properties to emulate specific anatomical, functional, or pathological features of human tissue.

This category includes two key product families:

• Heterogeneous phantoms, ideal for imaging system validation and algorithm benchmarking under realistic spatial complexity;

• Customized homogeneous phantoms, designed with tailored absorption and scattering profiles to replicate distinct tissue types, wavelengths, or instrumentation needs.

• Dynamic liquid phantom, a modulated liquid phantom for flow studies.

Whether for research, clinical prototyping, or quality assurance, these phantoms support realistic, reproducible, and traceable optical testing.

Key features of advanced tissue-mimicking optical phantoms

• Realistic tissue simulation
  Mimic absorption, scattering, and structural complexity of biological tissues.

• Tailored optical properties
  Custom μa and μs’ values across NIR and visible ranges, with wavelength-specific tuning.

• Spatial heterogeneity
  Enable robust testing of source-detector geometries, tomographic reconstruction, or feature detection.

• Batch reproducibility
  High repeatability across samples; fabrication protocols optimised for consistency.

• Solid and hybrid formats
  Options include solid phantoms but also hybrid models combining different materials.

• Application flexibility
  Ideal for CW, TD, FD, DOT, DCS, fNIRS, spectroscopy, surgical light validation, brain-computer interface,  and many more.

Why choose advanced tissue-mimicking optical phantoms

At BioPixS, phantom development is not a one-size-fits-all process — it’s science-driven and application-focused. Our advanced phantoms have been developed through:

• Participation in major EU-funded R&D projects (e.g., TinyBrains)

• Validation on multiple commercial and custom-built imaging systems

• Close collaboration with medical physicists, optics engineers, and clinical researchers

We offer fully bespoke solutions, with in-house control of:

• Phantom design (we are happy to use your CAD file)

• Design wavelength and optical characterization (for NIR or visible wavelengths from 470 to 1650 nm)

• Precision casting and quality assurance

These phantoms support your system development pipeline from bench to bedside.

Applications

Application Area	Description
Diffuse Optical Tomography (DOT)	Assess reconstruction algorithm accuracy with phantoms that include layered geometries or inclusions.
Diffuse Optical Spectroscopy (DOS)	Test and validate system, assess imaging capabilites.
Functional Near-Infrared Spectroscopy (fNIRS)	Model depth sensitivity and signal attenuation across spatially complex tissues.
Frequency- & Time-Domain Systems	Use phantoms with known μa and μs’ to validate phase shift, temporal response, signal decay and overall system performance.
Surgical Light Validation & PDT	Test light penetration and dose distribution through layered or scattering media.
Quality Assurance & Calibration	Standardise measurement protocols across labs or system builds using traceable phantoms.

Comparison table

Feature	Heterogeneous phantoms	Customized homogeneous phantoms	Dynamic Liquid Phantom
Structure	Multi-layered, embedded inclusions, realistic tissue analogues	Uniform solid slabs or custom shapes	Multi-component structure
Material Type	Solid	Solid	Solid/liquid
Optical Property Distribution	Spatially varying μa and μs’	Uniform μa and μs’ values (fully tunable)	Uniform μa and μs’ values for the solid component
Anatomical Fidelity	High — can replicate layered tissues or lesions	Moderate — geometric realism optional	Moderate — for flow studies
Reproducibility	Very high — batch consistency ensured	Very high — batch consistency ensured	Very high — batch consistency ensured
Customization Options	Inclusions, layers, topography	Optical properties, size, thickness	Dimension and location of pipe
Best Suited For	DOT, fNIRS, PDT, image reconstruction	TD, FD, CW calibration, DOS	DCS, modulation studies, imaging
Example Use Case	Testing tumour detection algorithms in DOT	Calibrating a TD-DOS instrument at 760 nm	Simulating pulsatile flow in tissue