{
  "ptid_time": "041_S_4004_2015-04-30",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4004/2015-04-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,187 mm³, 21.8% above the reference mean. With a Z-score of 0.50 (69.1th percentile), this represents normal volume ; hippocampal volume measures 6,299 mm³, 11.5% below the reference mean. With a Z-score of -1.05 (14.7th percentile), this represents mild atrophy; whole brain volume measures 978,310 mm³, 0.4% above the reference mean. With a Z-score of 0.05 (51.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,103 mm³, 15.5% below the reference mean. With a Z-score of -0.95 (17.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,633 mm³, 2.2% below the reference mean. With a Z-score of -0.20 (41.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,773 mm³, 7.3% below the reference mean. With a Z-score of -0.63 (26.4th percentile), this represents normal volume . ",
  "text_data": "Age is 70.8 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.05, 14.7th percentile), while other brain regions are within normal ranges. Cognitive scores (MMSE 30, MoCA 29) are intact, and amyloid PET (AV45) is normal, ruling out Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to hippocampal atrophy but no cognitive impairment or biomarker evidence of neurodegeneration)",
  "timestamp": "2025-07-26T07:09:13.416860"
}