Display performance and standards for primary digital pathology sign-out: Technical specifications, validation, and...

As labs transition from glass slides to whole-slide imaging (WSI), the diagnostic display becomes the pathologist's new microscope and the terminus of the pixel pipeline.

To synthesize technical, regulatory, and quality assurance (QA) guidance for monitors used in primary digital pathology sign-out and to clarify where pathology requirements diverge from radiology.

Narrative synthesis of available technical specifications from published technical articles for diagnostic displays in digital pathology, consolidated into practical guidance for selecting and interoperable swapping displays in the pixel pipeline.

Critically important monitor attributes include resolution/pixel density, luminance stability, contrast performance, and color rendering (gamut and bit depth). Debates remain over whether purpose-built medical-grade (MG) displays or high-performance consumer/professional-grade (CPG) displays are sufficient for digital pathology sign-out. Moreover, among the CPG display options, in-plane switching displays with light-emitting diode backlights remain preferred for sign-out over OLED (organic light-emitting diode) monitors. Whereas OLED monitors offer excellent contrast, there are durability and uniformity concerns. QA in labs deploying digital pathology should address luminescence deterioration and ambient lighting. Ergonomically, a 27-in. 4K display is adequate for primary sign-out; larger screens (30-32 in.) can expand the field of view but may introduce head/eye-movement and viewing distance burden.

Pathology's reliance on polychromatic stains necessitates display standards distinct from radiology's grayscale focus. Validated CPG displays can be acceptable alternatives to universally mandating for digital pathology sign-out, costly MG displays, provided a disciplined QA program supports them. Rigorous local validation and ongoing QA are indispensable.