{
  "ptid_time": "141_S_0717_2007-04-07",
  "img_path": "/data/qiuhui/data/adni/images/141_S_0717/2007-04-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,473 mm³, 2.7% below the reference mean. With a Z-score of -0.06 (47.4th percentile), this represents normal volume ; hippocampal volume measures 9,175 mm³, 21.4% above the reference mean. With a Z-score of 2.09 (98.1th percentile), this represents significant enlargement; whole brain volume measures 1,200,530 mm³, 11.2% above the reference mean. With a Z-score of 1.46 (92.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,750 mm³, 8.5% below the reference mean. With a Z-score of -0.58 (28.1th percentile), this represents normal volume ; fusiform gyrus volume measures 20,989 mm³, 11.4% above the reference mean. With a Z-score of 0.97 (83.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,028 mm³, 3.2% above the reference mean. With a Z-score of 0.29 (61.4th percentile), this represents normal volume . ",
  "text_data": "Age is 76.5 years. Gender is Male. Education: 12 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in most regions, including significant hippocampal enlargement (98.1th percentile) and mild whole-brain enlargement (92.7th percentile). The MMSE score of 30 is intact, and there is no APOE4 risk allele. The entorhinal cortex is slightly reduced but still within normal range (28.1th percentile).  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:46:58.792165"
}