{
  "ptid_time": "005_S_0602_2009-08-11",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0602/2009-08-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,372 mm³, 44.5% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy; hippocampal volume measures 8,117 mm³, 7.4% above the reference mean. With a Z-score of 0.72 (76.4th percentile), this represents normal volume ; whole brain volume measures 1,040,790 mm³, 3.6% below the reference mean. With a Z-score of -0.46 (32.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,554 mm³, 13.3% below the reference mean. With a Z-score of -0.90 (18.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,124 mm³, 1.5% above the reference mean. With a Z-score of 0.13 (55.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,602 mm³, 3.5% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume . ",
  "text_data": "Age is 73.7 years. Gender is Male. Education: 17 years. MMSE: 25.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular enlargement (suggesting mild atrophy) but otherwise normal brain volumes, including the hippocampus, which is typically affected early in Alzheimer's. The MMSE score of 25 is borderline but not definitively impaired. No APOE4 alleles reduce Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (MMSE is slightly low, but structural findings and lack of APOE4 support normal cognition)",
  "timestamp": "2025-07-25T21:13:18.518234"
}