{
  "ptid_time": "041_S_4060_2011-12-12",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4060/2011-12-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,949 mm³, 10.8% below the reference mean. With a Z-score of -0.31 (37.7th percentile), this represents normal volume ; hippocampal volume measures 7,942 mm³, 14.0% above the reference mean. With a Z-score of 1.21 (88.6th percentile), this represents mild enlargement; whole brain volume measures 1,079,430 mm³, 4.9% above the reference mean. With a Z-score of 0.64 (73.9th percentile), this represents normal volume ; entorhinal cortex volume measures 5,427 mm³, 36.7% above the reference mean. With a Z-score of 2.40 (99.2th percentile), this represents significant enlargement; fusiform gyrus volume measures 16,647 mm³, 7.9% below the reference mean. With a Z-score of -0.68 (24.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,670 mm³, 2.5% above the reference mean. With a Z-score of 0.22 (58.8th percentile), this represents normal volume . ",
  "text_data": "Age is 84.9 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 25.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in most regions, including significant enlargement in the entorhinal cortex and mild enlargement in the hippocampus. Cognitive scores (MMSE 30, MoCA 25) are within normal ranges for age, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:12:06.005837"
}