{
  "ptid_time": "005_S_0553_2012-12-18",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0553/2012-12-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,744 mm³, 2.3% below the reference mean. With a Z-score of -0.21 (41.7th percentile), this represents normal volume ; hippocampal volume measures 7,156 mm³, 12.4% above the reference mean. With a Z-score of 1.35 (91.1th percentile), this represents mild enlargement; whole brain volume measures 926,610 mm³, 7.5% below the reference mean. With a Z-score of -1.28 (10.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 2,442 mm³, 38.2% below the reference mean. With a Z-score of -1.96 (2.5th percentile), this represents moderate atrophy; fusiform gyrus volume measures 15,536 mm³, 7.8% below the reference mean. With a Z-score of -0.90 (18.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,750 mm³, 0.5% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume . ",
  "text_data": "Age is 90.6 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 22.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The patient shows mild whole brain atrophy and moderate entorhinal cortex atrophy, which are concerning for neurodegenerative changes, but hippocampal volume is mildly enlarged, which is atypical for Alzheimer's. Cognitive scores (MMSE 29, MoCA 26) are within normal limits for age, and APOE4-negative status reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to conflicting imaging findings despite normal cognition)",
  "timestamp": "2025-07-25T21:10:24.777668"
}