{
  "ptid_time": "072_S_4769_2013-07-01",
  "img_path": "/data/qiuhui/data/adni/images/072_S_4769/2013-07-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,126 mm³, 2.7% above the reference mean. With a Z-score of 0.08 (53.1th percentile), this represents normal volume ; hippocampal volume measures 7,145 mm³, 8.5% below the reference mean. With a Z-score of -1.18 (11.9th percentile), this represents mild atrophy; whole brain volume measures 1,008,040 mm³, 3.1% below the reference mean. With a Z-score of -0.37 (35.4th percentile), this represents normal volume ; entorhinal cortex volume measures 2,627 mm³, 28.9% below the reference mean. With a Z-score of -2.26 (1.2th percentile), this represents significant atrophy; fusiform gyrus volume measures 16,703 mm³, 9.4% below the reference mean. With a Z-score of -0.85 (19.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,444 mm³, 10.2% below the reference mean. With a Z-score of -0.84 (20.1th percentile), this represents normal volume . ",
  "text_data": "Age is 59.0 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in the entorhinal cortex (Z-score -2.26, 1.2th percentile) and mild hippocampal atrophy (Z-score -1.18, 11.9th percentile), both key regions in Alzheimer's pathology. However, cognitive scores (MMSE 30, MoCA 29) are intact, and whole brain volume is within normal range.  \n**Diagnosis:** **MCI** (due to structural changes without overt cognitive decline)  \n**Confidence:** **Medium** (structural changes suggest early neurodegeneration, but cognitive preservation complicates certainty)",
  "timestamp": "2025-07-26T09:26:18.359911"
}