{
  "ptid_time": "126_S_1077_2009-12-14",
  "img_path": "/data/qiuhui/data/adni/images/126_S_1077/2009-12-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 48,961 mm³, 4.1% above the reference mean. With a Z-score of 0.12 (54.8th percentile), this represents normal volume ; hippocampal volume measures 7,348 mm³, 5.5% above the reference mean. With a Z-score of 0.47 (68.1th percentile), this represents normal volume ; whole brain volume measures 1,022,320 mm³, 0.7% below the reference mean. With a Z-score of -0.09 (46.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,753 mm³, 5.4% below the reference mean. With a Z-score of -0.36 (36.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,391 mm³, 9.3% below the reference mean. With a Z-score of -0.80 (21.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,554 mm³, 8.0% below the reference mean. With a Z-score of -0.72 (23.6th percentile), this represents normal volume . ",
  "text_data": "Age is 86.3 years. Gender is Male. Education: 15 years. MMSE: 28.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 28 is within the normal range (≥26), and the absence of APOE4 further reduces Alzheimer's risk. No significant atrophy or cognitive impairment is evident.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T12:42:13.940308"
}