{
  "ptid_time": "002_S_1280_2013-02-26",
  "img_path": "/data/qiuhui/data/adni/images/002_S_1280/2013-02-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,538 mm³, 9.0% below the reference mean. With a Z-score of -0.21 (41.8th percentile), this represents normal volume ; hippocampal volume measures 6,332 mm³, 11.0% below the reference mean. With a Z-score of -1.01 (15.7th percentile), this represents mild atrophy; whole brain volume measures 948,788 mm³, 2.7% below the reference mean. With a Z-score of -0.33 (36.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,280 mm³, 10.7% below the reference mean. With a Z-score of -0.66 (25.6th percentile), this represents normal volume ; fusiform gyrus volume measures 15,507 mm³, 8.9% below the reference mean. With a Z-score of -0.81 (21.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,981 mm³, 11.4% below the reference mean. With a Z-score of -0.99 (16.1th percentile), this represents normal volume . ",
  "text_data": "Age is 76.7 years. Gender is Female. Education: 14 years. MMSE: 27.0. MoCA: 26.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.06 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.01, 15.7th percentile), while other brain regions are within normal ranges. Cognitive scores (MMSE 27, MoCA 26) are near the upper limit of normal, and amyloid PET (AV45) is normal. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology alone.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Hippocampal atrophy suggests early neurodegeneration, but cognitive scores are borderline, and amyloid is negative, making AD less likely.)",
  "timestamp": "2025-07-25T20:17:04.218565"
}