{
  "ptid_time": "116_S_4043_2012-05-08",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4043/2012-05-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,955 mm³, 29.9% below the reference mean. With a Z-score of -0.87 (19.3th percentile), this represents normal volume ; hippocampal volume measures 7,858 mm³, 12.8% above the reference mean. With a Z-score of 1.10 (86.5th percentile), this represents mild enlargement; whole brain volume measures 1,079,920 mm³, 4.9% above the reference mean. With a Z-score of 0.65 (74.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,688 mm³, 18.1% above the reference mean. With a Z-score of 1.19 (88.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,564 mm³, 2.8% below the reference mean. With a Z-score of -0.24 (40.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,887 mm³, 1.4% below the reference mean. With a Z-score of -0.13 (45.0th percentile), this represents normal volume . ",
  "text_data": "Age is 83.1 years. Gender is Male. Education: 20 years. MMSE: 28.0. MoCA: 25.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges or even mildly enlarged (hippocampus, entorhinal cortex), with no significant atrophy. Cognitive scores (MMSE 28, MoCA 25) are within normal limits for age, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:06:23.437761"
}