{
  "ptid_time": "022_S_4266_2012-05-25",
  "img_path": "/data/qiuhui/data/adni/images/022_S_4266/2012-05-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,608 mm³, 30.1% below the reference mean. With a Z-score of -0.69 (24.5th percentile), this represents normal volume ; hippocampal volume measures 7,725 mm³, 8.6% above the reference mean. With a Z-score of 0.79 (78.4th percentile), this represents normal volume ; whole brain volume measures 1,130,050 mm³, 15.9% above the reference mean. With a Z-score of 2.01 (97.8th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,446 mm³, 6.2% below the reference mean. With a Z-score of -0.38 (35.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,886 mm³, 11.0% above the reference mean. With a Z-score of 1.00 (84.2th percentile), this represents mild enlargement; middle temporal gyrus volume measures 21,709 mm³, 13.2% above the reference mean. With a Z-score of 1.15 (87.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 70.3 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in all measured regions, including the hippocampus, which is typically affected early in Alzheimer's disease. Cognitive scores (MMSE 30, MoCA 28) are within the normal range, and there is no evidence of structural atrophy or significant deviation from reference values.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:18:45.603418"
}