{
  "ptid_time": "116_S_1232_2008-01-30",
  "img_path": "/data/qiuhui/data/adni/images/116_S_1232/2008-01-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,281 mm³, 49.1% below the reference mean. With a Z-score of -1.12 (13.0th percentile), this represents mild atrophy; hippocampal volume measures 7,610 mm³, 7.0% above the reference mean. With a Z-score of 0.64 (73.9th percentile), this represents normal volume ; whole brain volume measures 976,684 mm³, 0.2% above the reference mean. With a Z-score of 0.03 (51.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,286 mm³, 16.7% above the reference mean. With a Z-score of 1.02 (84.7th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,210 mm³, 1.2% above the reference mean. With a Z-score of 0.11 (54.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,967 mm³, 6.3% below the reference mean. With a Z-score of -0.54 (29.3th percentile), this represents normal volume . ",
  "text_data": "Age is 73.1 years. Gender is Female. Education: 14 years. MMSE: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions like the hippocampus and entorhinal cortex. The MMSE score of 30 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:00:21.112181"
}