{
  "ptid_time": "018_S_0369_2009-07-16",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0369/2009-07-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 62,341 mm³, 61.9% above the reference mean. With a Z-score of 1.48 (93.1th percentile), this represents mild enlargement; hippocampal volume measures 7,077 mm³, 6.4% below the reference mean. With a Z-score of -0.62 (26.7th percentile), this represents normal volume ; whole brain volume measures 1,026,710 mm³, 4.9% below the reference mean. With a Z-score of -0.63 (26.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,357 mm³, 6.3% above the reference mean. With a Z-score of 0.42 (66.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,384 mm³, 2.4% below the reference mean. With a Z-score of -0.21 (41.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,211 mm³, 5.3% below the reference mean. With a Z-score of -0.48 (31.7th percentile), this represents normal volume . ",
  "text_data": "Age is 79.0 years. Gender is Male. Education: 18 years. MMSE: 28.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.48), but hippocampal, whole brain, and other regional volumes are within normal ranges (Z-scores between -0.63 and 0.42). The MMSE score of 28 is normal, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement could suggest early changes, but no other structural or clinical evidence supports MCI or dementia at this time)",
  "timestamp": "2025-07-26T00:48:12.972446"
}