{
  "ptid_time": "003_S_1074_2009-02-26",
  "img_path": "/data/qiuhui/data/adni/images/003_S_1074/2009-02-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,142 mm³, 32.0% below the reference mean. With a Z-score of -0.86 (19.4th percentile), this represents normal volume ; hippocampal volume measures 5,046 mm³, 22.3% below the reference mean. With a Z-score of -1.79 (3.7th percentile), this represents moderate atrophy; whole brain volume measures 968,119 mm³, 4.3% above the reference mean. With a Z-score of 0.52 (69.7th percentile), this represents normal volume ; entorhinal cortex volume measures 1,976 mm³, 42.9% below the reference mean. With a Z-score of -2.32 (1.0th percentile), this represents significant atrophy; fusiform gyrus volume measures 17,854 mm³, 10.8% above the reference mean. With a Z-score of 0.81 (79.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,275 mm³, 4.2% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume . ",
  "text_data": "Age is 87.0 years. Gender is Female. Education: 15 years. MMSE: 29.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The patient shows significant atrophy in the entorhinal cortex (Z-score -2.32, 1.0th percentile) and moderate atrophy in the hippocampus (Z-score -1.79, 3.7th percentile), both key regions affected in Alzheimer's disease. However, cognitive performance (MMSE 29/30) remains intact, and other brain volumes are normal.  \nDiagnosis: **MCI** (due to structural changes without overt cognitive decline)  \nConfidence: **Medium** (high structural risk but preserved cognition complicates early-stage classification)",
  "timestamp": "2025-07-25T20:44:30.492811"
}