Table 3.
Dimensions of ×40 digital high-power field for each monitor with various combinations of slide viewer and scanning platform
| Monitor | Slide viewer | “×40” HPF standard resolution | Microscope (HPF) area (mm2) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aperio AT2 (SVS) | Aperio GT450 (SVS) | Aperio AT2DX (SVS) | Philips (iSyntax) | 3DHistech (MRXS) | Hamamatsu (NDPI) | WSI Viewer; “×40” HPF area | ×10 ocular/20 mm diameter; ×40 objective | ×10 ocular/22 mm diameter; ×40 objective | Delta compared to ×10 ocular, 20 mm diameter, 40× objective (%) | Delta compared to ×10 ocular, 22 mm diameter, 40× objective (%) | ||
| 24” HP (Aspect ratio 16:9) | ImageScope | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.131 | 0.196 | 0.238 | −33 | −45 | |
| Philips IMS | 0.265×0.479 | 0.127 | 0.196 | 0.238 | −35 | −47 | ||||||
| CaseViewer | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.133 | 0.196 | 0.238 | −32 | −44 | ||
| NDP.view | 0.274×0.437 | 0.120 | 0.196 | 0.238 | −39 | −50 | ||||||
| MSK Slide Viewer | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.130 | 0.196 | 0.238 | −34 | −46 | |
| ImageScope DX | 0.125 | 0.196 | 0.238 | −36 | −47 | |||||||
| 24” Dell (Aspect ratio 16:10) | ImageScope | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.275×0.478 | 0.131 | 0.196 | 0.238 | −33 | −45 | |
| Philips IMS | 0.265×0.479 | 0.127 | 0.196 | 0.238 | −35 | −47 | ||||||
| CaseViewer | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.277×0.479 | 0.133 | 0.196 | 0.238 | −32 | −44 | ||
| NDP.view | 0.274×0.437 | 0.120 | 0.196 | 0.238 | −39 | −50 | ||||||
| MSK Slide Viewer | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.27×0.48 | 0.130 | 0.196 | 0.238 | −34 | −46 | |
| ImageScope DX | 0.264×0.473 | 0.125 | 0.196 | 0.238 | −36 | −47 | ||||||
| 27” Philips (Aspect ratio 16:9) | ImageScope | 0.335×0.638 | 0.335×0.638 | 0.335×0.638 | 0.335×0.638 | 0.335×0.638 | 0.214 | 0.196 | 0.238 | 9 | −10 | |
| Philips IMS | 0.326×0.639 | 0.208 | 0.196 | 0.238 | 6 | −12 | ||||||
| CaseViewer | 0.338×0.639 | 0.338×0.639 | 0.338×0.639 | 0.338×0.639 | 0.338×0.639 | 0.216 | 0.196 | 0.238 | 10 | −9 | ||
| NDP.view | 0.328×0.584 | 0.192 | 0.196 | 0.238 | −2 | −20 | ||||||
| MSK Slide Viewer | 0.33×0.64 | 0.33×0.64 | 0.33×0.64 | 0.33×0.64 | 0.33×0.64 | 0.33×0.64 | 0.211 | 0.196 | 0.238 | 8 | −11 | |
| ImageScope DX | 0.196 | 0.238 | ||||||||||
| 28” Microsoft Studio (Aspect ratio 3:2) | ImageScope | 1.469×2.249 | 1.469×2.249 | 1.469×2.249 | 1.469×2.249 | 1.469×2.249 | 3.304 | 0.196 | 0.238 | 1586 | 1288 | |
| Philips IMS | 0.716×1.12 | 0.802 | 0.196 | 0.238 | 309 | 237 | ||||||
| CaseViewer | 1.47×2.247 | 1.47×2.247 | 1.47×2.247 | 1.47×2.247 | 1.47×2.247 | 3.303 | 0.196 | 0.238 | 1585 | 1288 | ||
| NDP.view | 0.684×1.03 | 0.705 | 0.196 | 0.238 | 259 | 196 | ||||||
| MSK Slide Viewer | 0.72×1.12 | 0.72×1.12 | 0.72×1.12 | 0.72×1.12 | 0.72×1.12 | 0.72×1.12 | 0.806 | 0.196 | 0.238 | 311 | 239 | |
| ImageScope DX | 0.196 | 0.238 | ||||||||||
This dimension was then compared to the diameter of a 10×/20 mm and 10×/22 mm, 40×objective by calculating the delta as a percentage change. HPF: High-power field