{
  "ptid_time": "126_S_5243_2015-08-20",
  "img_path": "/data/qiuhui/data/adni/images/126_S_5243/2015-08-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,797 mm³, 38.2% below the reference mean. With a Z-score of -0.92 (18.0th percentile), this represents normal volume ; hippocampal volume measures 8,947 mm³, 18.4% above the reference mean. With a Z-score of 1.79 (96.3th percentile), this represents moderate enlargement; whole brain volume measures 1,067,620 mm³, 1.1% below the reference mean. With a Z-score of -0.14 (44.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,875 mm³, 18.9% above the reference mean. With a Z-score of 1.28 (90.0th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,057 mm³, 6.5% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,550 mm³, 3.7% below the reference mean. With a Z-score of -0.33 (37.0th percentile), this represents normal volume . ",
  "text_data": "Age is 73.0 years. Gender is Male. Education: 12 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 8.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus), with no significant atrophy. Cognitive scores (MMSE 27, MoCA 25) are within normal limits for age, and amyloid PET (AV45) is normal. APOE4 carrier status alone does not indicate pathology without other biomarkers.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:53:22.636287"
}