Higher melanin levels also led to lower SpO 2 readings. However, melanin was not found to affect StO 2 or the absorption or reduced scattering coefficients at either wavelength.

Traditional medical imaging – used to diagnose, monitor or treat certain medical conditions – has long struggled to get clear pictures of patients with dark skin, according to experts.

Higher melanin levels also led to lower SpO 2 readings. However, melanin was not found to affect StO 2 or the absorption or reduced scattering coefficients at either wavelength.