{
  "ptid_time": "068_S_4174_2012-03-15",
  "img_path": "/data/qiuhui/data/adni/images/068_S_4174/2012-03-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,906 mm³, 50.5% below the reference mean. With a Z-score of -1.16 (12.4th percentile), this represents mild atrophy; hippocampal volume measures 8,305 mm³, 16.7% above the reference mean. With a Z-score of 1.53 (93.8th percentile), this represents moderate enlargement; whole brain volume measures 1,028,210 mm³, 5.5% above the reference mean. With a Z-score of 0.69 (75.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,385 mm³, 7.8% below the reference mean. With a Z-score of -0.48 (31.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,514 mm³, 2.9% above the reference mean. With a Z-score of 0.27 (60.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,253 mm³, 0.4% above the reference mean. With a Z-score of 0.04 (51.5th percentile), this represents normal volume . ",
  "text_data": "Age is 74.2 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 30.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy (Z-score -1.16) but otherwise normal or above-average volumes in key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 30, MoCA 30) are intact, and APOE4 status (heterozygous) is the only notable risk factor.  \n\nDiagnosis: **CN (Cognitively Normal)**  \nConfidence: **High** (No significant structural or cognitive deficits to suggest MCI or dementia)",
  "timestamp": "2025-07-26T09:00:05.320168"
}