{
  "ptid_time": "068_S_4424_2015-06-02",
  "img_path": "/data/qiuhui/data/adni/images/068_S_4424/2015-06-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 9,756 mm³, 56.3% below the reference mean. With a Z-score of -1.41 (7.9th percentile), this represents mild atrophy; hippocampal volume measures 7,047 mm³, 8.3% below the reference mean. With a Z-score of -0.93 (17.6th percentile), this represents normal volume ; whole brain volume measures 926,565 mm³, 10.0% below the reference mean. With a Z-score of -1.24 (10.7th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,624 mm³, 6.9% below the reference mean. With a Z-score of -0.54 (29.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,847 mm³, 9.0% above the reference mean. With a Z-score of 1.01 (84.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 20,882 mm³, 1.8% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume . ",
  "text_data": "Age is 69.2 years. Gender is Female. Education: 12 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 9.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild atrophy in ventricular and whole brain volumes, but hippocampal and entorhinal cortex volumes are within normal ranges. Cognitive scores (MMSE 29, MoCA 25) are borderline for MCI (MoCA <26 suggests possible impairment), but structural atrophy is not severe enough to suggest dementia. APOE4 carrier status increases Alzheimer's risk but is not diagnostic.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Cognitive scores suggest possible impairment, but structural changes are mild and not fully consistent with dementia.)",
  "timestamp": "2025-07-26T09:02:23.200070"
}