Detection and visualization of intracutaneous allergic type‐specific elements using long‐wavelength near‐infrared hyperspectral imaging

Abstract

These results suggest a possible application of near-infrared spectral imaging to the assessment of allergic dermatitis.

Hyperspectral imaging and characterization of allergic contact dermatitis in the short‐wave infrared

“…[ 22 ] Nishino et al used HSI in the infrared from 1000 to 2400 nm to develop a spectral‐based classifier that could distinguish between normal skin, type I urticarial reactions and type IV hypersensitivity reactions. [ 20 ]…”

“…[22] Nishino et al used HSI in the infrared from 1000 to 2400 nm to develop a spectral-based classifier that could distinguish between normal skin, type I urticarial reactions and type IV hypersensitivity reactions. [20] The core notion of the presented work is to approach a common skin condition in a more mechanistic way guided by an understanding of the pathophysiology behind the disease with an imaging tool. An important distinction of our approach is to generate enhanced visual contrast by identification of specific wavelengths with which to generate high contrast pseudo-RGB images and our ability to quantify the relative increase in lesional tissue fluid accumulation compared to background unaffected skin.…”

“…The reflectance spectra of the unaffected skin adjacent to the injection site ( Figure 3D) presents several well-defined features that are consistent with the published skin reflectance measurements. [20] Within the SWIR spectral range, relatively high reflection in the range from 1000 to 1350 nm is due to the relatively low absorptivity of water, lipids, melanin and proteins [19,21] that constitutes the chemical composition of the skin. The presence of dermal saline immediately after its subcutaneous injection decreases the reflection intensity.…”

Hyperspectral and multispectral image processing for gross-level tumor detection in skin lesions: a systematic review

“…35 Several reports used the Nuance EX system coupled with additional halogen lamps and a polarizing film on the lens 67,38,59 or with a single halogen lamp at 45 deg/0 deg geometry. 44 Nishino et al 44 used the VIS HSI only for visualization purposes, while simultaneously using an NIR line-scan camera for data collection. Randeberg et al 33 used the VNIR camera and illuminated the scene with two halogen lamps, with sandblasting to reduce specular reflectance.…”

“…Liu et al 45 used PCA to reduce HSI data to a 28-point space, before additional reduction with multiclass LDA. Nishino et al 44 employed a flavor of multiclass LDA that is based on canonical coordinates and canonical discriminant analysis (CDA) for NIR spectra.…”