{
  "ptid_time": "941_S_6495_2018-07-17",
  "img_path": "/data/qiuhui/data/adni/images/941_S_6495/2018-07-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 73,132 mm³, 97.8% above the reference mean. With a Z-score of 2.64 (99.6th percentile), this represents significant enlargement; hippocampal volume measures 6,461 mm³, 0.5% below the reference mean. With a Z-score of -0.04 (48.3th percentile), this represents normal volume ; whole brain volume measures 890,090 mm³, 4.1% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,040 mm³, 12.2% below the reference mean. With a Z-score of -0.66 (25.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,955 mm³, 1.0% below the reference mean. With a Z-score of -0.07 (47.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,179 mm³, 0.8% above the reference mean. With a Z-score of 0.07 (53.0th percentile), this represents normal volume . ",
  "text_data": "Age is 83.3 years. Gender is Female. Education: 17 years. Handedness: Left. Race: White. MMSE: 27.0. MoCA: 25.0. Logical Memory: 13.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (97.8% above mean, Z-score 2.64), which is a strong indicator of brain atrophy, while hippocampal and other regional volumes are within normal ranges. Cognitive scores (MMSE 27, MoCA 25) are borderline but still within normal limits for age.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Ventricular enlargement suggests neurodegeneration, but cognitive scores are not yet in the dementia range.)",
  "timestamp": "2025-07-26T17:48:34.901193"
}