{
  "ptid_time": "011_S_0861_2007-04-12",
  "img_path": "/data/qiuhui/data/adni/images/011_S_0861/2007-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 61,036 mm³, 29.8% above the reference mean. With a Z-score of 0.87 (80.7th percentile), this represents normal volume ; whole brain volume measures 881,829 mm³, 14.3% below the reference mean. With a Z-score of -1.88 (3.0th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 87.6 years. Gender is Male. Education: 16 years. MMSE: 27.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows moderate whole brain atrophy (Z-score -1.88, 3rd percentile) but normal ventricular volume. Despite the atrophy, cognitive function appears preserved (MMSE 27/30), and APOE4 homozygosity increases Alzheimer’s risk.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (due to significant atrophy with preserved cognition, but high AD risk).  \n**Confidence:** **Medium** (MMSE is borderline normal, but atrophy and APOE4 suggest progression risk).",
  "timestamp": "2025-07-25T22:49:30.459399"
}