{
  "ptid_time": "021_S_0273_2006-10-06",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0273/2006-10-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 44,974 mm³, 49.8% above the reference mean. With a Z-score of 1.18 (88.2th percentile), this represents mild enlargement; hippocampal volume measures 7,787 mm³, 3.0% below the reference mean. With a Z-score of -0.30 (38.3th percentile), this represents normal volume ; whole brain volume measures 1,066,550 mm³, 6.0% below the reference mean. With a Z-score of -0.85 (19.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,583 mm³, 15.9% below the reference mean. With a Z-score of -1.10 (13.5th percentile), this represents mild atrophy; fusiform gyrus volume measures 21,516 mm³, 8.1% above the reference mean. With a Z-score of 0.67 (74.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,288 mm³, 3.9% above the reference mean. With a Z-score of 0.32 (62.6th percentile), this represents normal volume . ",
  "text_data": "Age is 63.3 years. Gender is Male. Education: 12 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement, and the entorhinal cortex has mild atrophy, which are early signs of neurodegeneration. However, hippocampal and whole brain volumes are within normal limits, and the MMSE score of 29 is intact, suggesting no significant cognitive impairment.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to mild structural changes but preserved cognition and no APOE4 risk)",
  "timestamp": "2025-07-26T01:23:36.039469"
}