{
  "ptid_time": "130_S_0886_2007-04-11",
  "img_path": "/data/qiuhui/data/adni/images/130_S_0886/2007-04-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,402 mm³, 34.4% below the reference mean. With a Z-score of -0.79 (21.5th percentile), this represents normal volume ; hippocampal volume measures 7,121 mm³, 0.1% above the reference mean. With a Z-score of 0.01 (50.3th percentile), this represents normal volume ; whole brain volume measures 966,149 mm³, 0.9% below the reference mean. With a Z-score of -0.11 (45.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,371 mm³, 8.2% below the reference mean. With a Z-score of -0.50 (30.7th percentile), this represents normal volume ; fusiform gyrus volume measures 14,885 mm³, 12.5% below the reference mean. With a Z-score of -1.14 (12.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,603 mm³, 8.2% below the reference mean. With a Z-score of -0.71 (23.9th percentile), this represents normal volume . ",
  "text_data": "Age is 71.8 years. Gender is Female. Education: 15 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the fusiform gyrus (Z-score -1.14, 12.7th percentile). The hippocampal volume is normal (50.3rd percentile), and the MMSE score of 30 is intact. No APOE4 alleles further reduce Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T14:31:53.105588"
}