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Device resolution and imaging depths1.
| Resolution | Penetration depth | |
|---|---|---|
| Confocal microscopy | 1 μm | ~500 μm |
| Optical coherence tomography | 2–10 μm | ~2 mm |
| Ultrasonography | 150 μm | ~10 cm |
| High-resolution computed tomography | 300 μm | Entire body |
| Magnetic resonance imaging | 1 mm | Entire body |
