{
  "ptid_time": "116_S_0657_2007-03-09",
  "img_path": "/data/qiuhui/data/adni/images/116_S_0657/2007-03-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,487 mm³, 37.1% above the reference mean. With a Z-score of 0.85 (80.2th percentile), this represents normal volume ; hippocampal volume measures 6,644 mm³, 6.6% below the reference mean. With a Z-score of -0.61 (27.2th percentile), this represents normal volume ; whole brain volume measures 1,003,950 mm³, 3.0% above the reference mean. With a Z-score of 0.38 (64.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,264 mm³, 11.1% below the reference mean. With a Z-score of -0.68 (24.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,553 mm³, 2.7% below the reference mean. With a Z-score of -0.25 (40.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,274 mm³, 11.0% above the reference mean. With a Z-score of 0.95 (83.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.2 years. Gender is Female. Education: 13 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measures, including hippocampal and entorhinal cortex volumes, are within normal ranges (Z-scores between -0.68 and 0.95). The MMSE score of 28 is within the normal range (≥26), and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:56:50.624099"
}