Inspired by o3 guess a photo’s location. This demo shows chatgpt-o3’s thinking and analyzing process. I pasted the result here, since gpt share url DOES NOT include images.
TODO: find a better pair of (goodcase, badcase)
NOTE: the first prompt does regular reasoning, this is result of second prompt, which I explicitly asked it to
can you zoom in to check if there’s any subtle abnormalities?
Final interpretations
What I did to “zoom in”
I loaded the raw pixel data, enlarged each quadrant to ≈4× native resolution, and then inspected:
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Both sub-pleural crescents and costophrenic angles
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Central hila / main bronchi
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Segmental vessels out to the pleura
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Bony cortices and surrounding soft tissue
What I looked for (and did not see)
| Region examined | Subtle findings that would raise concern | Observation on this slice |
|---|---|---|
| Peripheral 1 cm strip (common spot for tiny sub-pleural nodules, early fibrosis, pleural plaques) | Micronodules, reticulation, pleural tags, calcified plaques | Pleural contour is smooth & continuous; no nodular densities or striae. |
| Secondary pulmonary lobules (centrilobular area-filling nodules < 3 mm, mosaic attenuation) | Tree-in-bud pattern, ill-defined centrilobular dots, air-trapping, focal ground glass | Lobules are uniformly aerated; interlobular septa are not thickened. No GG haziness; vessel caliber tapers normally. |
| Fissures (subtle pleural nodules or plaques) | Irregular thickening, focal bulges | Minor normal curvilinear fissural line; no plaque or nodularity. |
| Hilar soft tissue (≈1 cm medial to main bronchi) | Discrete rounded node, asymmetric density, vessel cut-off (emboli) | All rounded opacities correspond to vascular cross-sections; margins blend into contiguous vessels, size symmetric L↔R. |
| Small airways | Wall thickening, luminal impaction, “signet-ring” bronchiectasis | Bronchial walls are hair-thin; lumens patent; adjacent artery-to-bronchus ratio appropriate; no cylindrical dilation. |
| Bone window checks | Subtle lytic/blastic foci, occult fracture line | Cortical outlines remain unbroken; internal trabeculation homogeneous. |
Bottom-line interpretation of the magnified review
Even with close-in digital scrutiny there is no evidence of a subtle nodule, ground-glass opacity, focal fibrosis, bronchiectasis, pleural disease, or occult bone lesion on this particular axial section.
Important limitations & next steps
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Single-slice view – pathology can lie one slice above or below, or become evident only on coronal/sagittal reformats.
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Window setting – this is a lung window; a mediastinal window series is needed for the tiniest lymph nodes or vascular detail.
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Clinical correlation – symptoms (e.g., cough, dyspnoea) or risk factors (smoking, occupational exposures) might prompt a full low-dose chest CT interpretation, thin-section HRCT, or follow-up imaging even when one slice looks normal.