{
  "ptid_time": "021_S_0276_2007-10-04",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0276/2007-10-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,993 mm³, 32.5% below the reference mean. With a Z-score of -0.78 (21.8th percentile), this represents normal volume ; hippocampal volume measures 8,980 mm³, 18.8% above the reference mean. With a Z-score of 1.83 (96.7th percentile), this represents moderate enlargement; whole brain volume measures 1,196,540 mm³, 10.9% above the reference mean. With a Z-score of 1.41 (92.1th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,698 mm³, 14.6% above the reference mean. With a Z-score of 0.99 (83.8th percentile), this represents normal volume ; fusiform gyrus volume measures 19,998 mm³, 6.2% above the reference mean. With a Z-score of 0.52 (70.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,014 mm³, 17.2% above the reference mean. With a Z-score of 1.55 (93.9th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 72.4 years. Gender is Male. Education: 18 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volume data shows normal or above-average volumes in all measured regions, including the hippocampus, which is typically atrophied in Alzheimer's disease. The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T01:24:40.665564"
}