{
  "ptid_time": "006_S_0675_2007-04-26",
  "img_path": "/data/qiuhui/data/adni/images/006_S_0675/2007-04-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,572 mm³, 26.7% above the reference mean. With a Z-score of 0.61 (73.0th percentile), this represents normal volume ; whole brain volume measures 804,322 mm³, 17.5% below the reference mean. With a Z-score of -2.20 (1.4th percentile), this represents significant atrophy. ",
  "text_data": "Age is 79.3 years. Gender is Female. Education: 18 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows significant whole brain atrophy (Z-score -2.20, 1.4th percentile) but normal ventricular volume. The MMSE score of 26 is borderline, and the absence of APOE4 reduces genetic risk. The atrophy suggests neurodegeneration, but cognitive performance is only mildly impaired.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Atrophy is severe, but MMSE is near-normal, and APOE4 status is negative.)",
  "timestamp": "2025-07-25T21:30:41.932099"
}