{
  "ptid_time": "941_S_4292_2012-12-20",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4292/2012-12-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,555 mm³, 36.2% below the reference mean. With a Z-score of -0.87 (19.3th percentile), this represents normal volume ; hippocampal volume measures 7,711 mm³, 2.0% above the reference mean. With a Z-score of 0.20 (57.8th percentile), this represents normal volume ; whole brain volume measures 1,032,520 mm³, 4.3% below the reference mean. With a Z-score of -0.56 (28.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,499 mm³, 14.7% below the reference mean. With a Z-score of -0.99 (16.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,923 mm³, 10.2% below the reference mean. With a Z-score of -0.87 (19.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,607 mm³, 8.1% below the reference mean. With a Z-score of -0.73 (23.3th percentile), this represents normal volume . ",
  "text_data": "Age is 71.9 years. Gender is Male. Education: 15 years. MMSE: 29.0. MoCA: 24.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are within normal ranges, with no significant atrophy. Cognitive scores (MMSE 29, MoCA 24) are borderline for MCI (MoCA <26 suggests possible impairment), but structural imaging does not support neurodegeneration. APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (MoCA is slightly low, but imaging and APOE4 status suggest no pathology)",
  "timestamp": "2025-07-26T17:37:34.942635"
}