{
  "ptid_time": "033_S_0734_2008-08-08",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0734/2008-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 60,566 mm³, 57.2% above the reference mean. With a Z-score of 1.37 (91.5th percentile), this represents mild enlargement; hippocampal volume measures 7,148 mm³, 5.4% below the reference mean. With a Z-score of -0.53 (29.8th percentile), this represents normal volume ; whole brain volume measures 1,087,670 mm³, 0.8% above the reference mean. With a Z-score of 0.10 (54.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,562 mm³, 11.3% above the reference mean. With a Z-score of 0.76 (77.7th percentile), this represents normal volume ; fusiform gyrus volume measures 15,656 mm³, 16.9% below the reference mean. With a Z-score of -1.44 (7.5th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,337 mm³, 0.0% below the reference mean. With a Z-score of -0.00 (50.0th percentile), this represents normal volume . ",
  "text_data": "Age is 74.6 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular enlargement (57.2% above mean) and mild fusiform gyrus atrophy (16.9% below mean), but hippocampal volume is normal (-5.4% below mean). MMSE is intact (30/30), and APOE4 is negative, suggesting no strong genetic risk. The structural changes are mild and not yet clinically significant.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild structural changes despite normal cognition)",
  "timestamp": "2025-07-26T05:17:11.090091"
}