{
  "ptid_time": "018_S_0043_2010-02-19",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0043/2010-02-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,645 mm³, 15.7% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume ; hippocampal volume measures 7,143 mm³, 2.5% above the reference mean. With a Z-score of 0.22 (58.6th percentile), this represents normal volume ; whole brain volume measures 1,025,610 mm³, 0.3% below the reference mean. With a Z-score of -0.05 (48.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,876 mm³, 2.3% below the reference mean. With a Z-score of -0.15 (43.9th percentile), this represents normal volume ; fusiform gyrus volume measures 18,728 mm³, 3.7% above the reference mean. With a Z-score of 0.32 (62.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,839 mm³, 6.6% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume . ",
  "text_data": "Age is 80.2 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. The MMSE score of 30.0 is perfect, and the absence of APOE4 alleles further reduces Alzheimer's risk. No structural or cognitive abnormalities are present.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T00:41:57.103297"
}