{
  "ptid_time": "094_S_2201_2013-01-15",
  "img_path": "/data/qiuhui/data/adni/images/094_S_2201/2013-01-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,505 mm³, 36.6% above the reference mean. With a Z-score of 0.92 (82.0th percentile), this represents normal volume ; hippocampal volume measures 6,990 mm³, 9.0% below the reference mean. With a Z-score of -1.01 (15.5th percentile), this represents mild atrophy; whole brain volume measures 1,012,820 mm³, 1.6% below the reference mean. With a Z-score of -0.20 (42.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,618 mm³, 7.1% below the reference mean. With a Z-score of -0.55 (29.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,319 mm³, 0.6% above the reference mean. With a Z-score of 0.07 (52.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,167 mm³, 6.6% below the reference mean. With a Z-score of -0.59 (27.9th percentile), this represents normal volume . ",
  "text_data": "Age is 65.7 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.01, 15.5th percentile), which is a key biomarker for Alzheimer's pathology, but other brain regions are within normal limits. Cognitive scores (MMSE 30, MoCA 29) are intact, and amyloid PET (AV45) is normal, making active Alzheimer's unlikely.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to hippocampal atrophy but no cognitive or amyloid evidence of disease)",
  "timestamp": "2025-07-26T10:25:16.807320"
}