{
  "ptid_time": "020_S_0883_2007-05-14",
  "img_path": "/data/qiuhui/data/adni/images/020_S_0883/2007-05-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,283 mm³, 32.8% above the reference mean. With a Z-score of 0.75 (77.4th percentile), this represents normal volume ; hippocampal volume measures 6,960 mm³, 2.2% below the reference mean. With a Z-score of -0.20 (42.1th percentile), this represents normal volume ; whole brain volume measures 1,000,060 mm³, 2.6% above the reference mean. With a Z-score of 0.33 (62.9th percentile), this represents normal volume ; entorhinal cortex volume measures 2,190 mm³, 40.4% below the reference mean. With a Z-score of -2.48 (0.7th percentile), this represents significant atrophy; fusiform gyrus volume measures 18,808 mm³, 10.6% above the reference mean. With a Z-score of 0.96 (83.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,843 mm³, 1.7% below the reference mean. With a Z-score of -0.15 (44.1th percentile), this represents normal volume . ",
  "text_data": "Age is 76.6 years. Gender is Female. Education: 16 years. MMSE: 30.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex shows significant atrophy (Z-score -2.48, 0.7th percentile), which is a strong biomarker for early Alzheimer's pathology. However, hippocampal volume is normal, MMSE is intact (30/30), and other brain regions are within normal ranges. APOE4 carrier status increases risk but does not confirm disease.  \n**Diagnosis:** **MCI** (due to entorhinal atrophy but preserved cognition and hippocampal volume).  \n**Confidence:** **Medium** (clinical correlation needed; cognitive testing may not yet reflect structural changes).",
  "timestamp": "2025-07-26T01:11:40.990265"
}