{
  "ptid_time": "094_S_1267_2009-06-15",
  "img_path": "/data/qiuhui/data/adni/images/094_S_1267/2009-06-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,502 mm³, 46.8% below the reference mean. With a Z-score of -1.12 (13.1th percentile), this represents mild atrophy; hippocampal volume measures 8,563 mm³, 13.3% above the reference mean. With a Z-score of 1.30 (90.2th percentile), this represents mild enlargement; whole brain volume measures 1,178,980 mm³, 9.2% above the reference mean. With a Z-score of 1.20 (88.4th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,429 mm³, 8.0% above the reference mean. With a Z-score of 0.54 (70.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,174 mm³, 1.8% above the reference mean. With a Z-score of 0.15 (56.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,736 mm³, 1.9% above the reference mean. With a Z-score of 0.17 (56.6th percentile), this represents normal volume . ",
  "text_data": "Age is 75.2 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal-to-above-average volumes in key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus). The MMSE score of 30 is intact, and the absence of APOE4 alleles reduces genetic risk. No cognitive deficits are reported.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:20:41.499296"
}