{
  "ptid_time": "018_S_0043_2009-01-21",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0043/2009-01-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,237 mm³, 3.3% below the reference mean. With a Z-score of -0.08 (46.8th percentile), this represents normal volume ; hippocampal volume measures 7,345 mm³, 2.8% below the reference mean. With a Z-score of -0.28 (39.1th percentile), this represents normal volume ; whole brain volume measures 1,043,140 mm³, 3.4% below the reference mean. With a Z-score of -0.44 (33.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,534 mm³, 10.6% above the reference mean. With a Z-score of 0.72 (76.3th percentile), this represents normal volume ; fusiform gyrus volume measures 20,019 mm³, 6.3% above the reference mean. With a Z-score of 0.53 (70.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,349 mm³, 9.3% below the reference mean. With a Z-score of -0.84 (20.1th percentile), this represents normal volume . ",
  "text_data": "Age is 79.2 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 21.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 30 is optimal, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T00:41:50.094082"
}