{
  "ptid_time": "137_S_4520_2017-11-08",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4520/2017-11-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,703 mm³, 41.1% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume ; hippocampal volume measures 8,678 mm³, 14.8% above the reference mean. With a Z-score of 1.44 (92.6th percentile), this represents mild enlargement; whole brain volume measures 1,121,850 mm³, 3.9% above the reference mean. With a Z-score of 0.51 (69.5th percentile), this represents normal volume ; entorhinal cortex volume measures 6,500 mm³, 58.5% above the reference mean. With a Z-score of 3.97 (100.0th percentile), this represents profound enlargement; fusiform gyrus volume measures 19,404 mm³, 3.0% above the reference mean. With a Z-score of 0.26 (60.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,345 mm³, 4.7% below the reference mean. With a Z-score of -0.42 (33.8th percentile), this represents normal volume . ",
  "text_data": "Age is 73.3 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.17 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, whole brain), with no significant atrophy. Cognitive scores (MMSE 29, MoCA 28) are within normal ranges, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:34:46.927249"
}