{
  "ptid_time": "128_S_0715_2007-08-02",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0715/2007-08-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 57,132 mm³, 54.6% above the reference mean. With a Z-score of 1.47 (93.0th percentile), this represents mild enlargement; hippocampal volume measures 6,438 mm³, 0.9% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume ; whole brain volume measures 964,455 mm³, 3.9% above the reference mean. With a Z-score of 0.47 (68.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,212 mm³, 21.6% above the reference mean. With a Z-score of 1.17 (87.9th percentile), this represents mild enlargement; fusiform gyrus volume measures 14,774 mm³, 8.3% below the reference mean. With a Z-score of -0.62 (26.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,739 mm³, 3.9% above the reference mean. With a Z-score of 0.35 (63.7th percentile), this represents normal volume . ",
  "text_data": "Age is 81.0 years. Gender is Female. Education: 13 years. MMSE: 28.0. Logical Memory: 5.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.47), which can be associated with aging or early neurodegenerative changes, but hippocampal volume is normal (Z-score -0.07), and whole brain volume is also normal (Z-score 0.47). The MMSE score of 28 is within the normal range, and there is no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular enlargement, but no other significant structural or cognitive deficits)",
  "timestamp": "2025-07-26T13:49:07.298235"
}