{
  "ptid_time": "023_S_0061_2008-12-19",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0061/2008-12-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,459 mm³, 6.8% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; hippocampal volume measures 7,089 mm³, 9.1% above the reference mean. With a Z-score of 0.73 (76.8th percentile), this represents normal volume ; whole brain volume measures 888,942 mm³, 4.2% below the reference mean. With a Z-score of -0.51 (30.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,665 mm³, 34.7% above the reference mean. With a Z-score of 1.87 (97.0th percentile), this represents moderate enlargement; fusiform gyrus volume measures 16,623 mm³, 3.2% above the reference mean. With a Z-score of 0.24 (59.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,428 mm³, 8.9% below the reference mean. With a Z-score of -0.79 (21.5th percentile), this represents normal volume . ",
  "text_data": "Age is 80.0 years. Gender is Female. Education: 15 years. MMSE: 28.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements, including hippocampal and whole brain volumes, are within normal ranges, with no significant atrophy typically seen in Alzheimer's disease. The MMSE score of 28 is within the normal range for cognitive function, and the absence of APOE4 alleles further reduces Alzheimer's risk. The entorhinal cortex enlargement is atypical but not indicative of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:31:43.176432"
}