{
  "ptid_time": "012_S_4128_2012-03-06",
  "img_path": "/data/qiuhui/data/adni/images/012_S_4128/2012-03-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,974 mm³, 67.4% above the reference mean. With a Z-score of 1.54 (93.9th percentile), this represents moderate enlargement; hippocampal volume measures 6,701 mm³, 5.8% below the reference mean. With a Z-score of -0.53 (29.7th percentile), this represents normal volume ; whole brain volume measures 973,309 mm³, 0.1% below the reference mean. With a Z-score of -0.02 (49.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,989 mm³, 8.6% above the reference mean. With a Z-score of 0.53 (70.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,307 mm³, 1.7% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,348 mm³, 16.6% above the reference mean. With a Z-score of 1.44 (92.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 73.3 years. Gender is Female. Education: 12 years. MMSE: 27.0. MoCA: 25.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows moderate enlargement (Z-score 1.54), which can indicate atrophy, but hippocampal volume is normal (Z-score -0.53), and other regions are within normal ranges. Cognitive scores (MMSE 27, MoCA 25) are borderline but not strongly indicative of dementia. APOE4 carrier status increases Alzheimer’s risk, but structural findings alone are insufficient for a dementia diagnosis.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to borderline cognitive scores and ventricular enlargement, but lack of significant hippocampal atrophy or clear dementia-level impairment).",
  "timestamp": "2025-07-25T23:12:31.757502"
}