{
  "ptid_time": "137_S_4632_2013-06-21",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4632/2013-06-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,705 mm³, 42.2% above the reference mean. With a Z-score of 1.00 (84.2th percentile), this represents mild enlargement; hippocampal volume measures 7,830 mm³, 2.5% below the reference mean. With a Z-score of -0.25 (40.3th percentile), this represents normal volume ; whole brain volume measures 1,158,250 mm³, 2.1% above the reference mean. With a Z-score of 0.30 (61.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,341 mm³, 1.8% above the reference mean. With a Z-score of 0.13 (55.0th percentile), this represents normal volume ; fusiform gyrus volume measures 21,024 mm³, 5.6% above the reference mean. With a Z-score of 0.47 (67.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,495 mm³, 4.8% above the reference mean. With a Z-score of 0.40 (65.5th percentile), this represents normal volume . ",
  "text_data": "Age is 68.7 years. Gender is Male. Education: 18 years. MMSE: 26.0. MoCA: 28.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (42.2% above mean, Z-score 1.00), but hippocampal and other key brain volumes (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive scores (MMSE 26, MoCA 28) are also normal, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High**  \n\n(No significant atrophy or cognitive impairment suggestive of MCI or dementia.)",
  "timestamp": "2025-07-26T16:40:22.298369"
}