{
  "ptid_time": "036_S_4491_2012-08-09",
  "img_path": "/data/qiuhui/data/adni/images/036_S_4491/2012-08-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,730 mm³, 15.5% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume ; hippocampal volume measures 7,046 mm³, 1.1% above the reference mean. With a Z-score of 0.10 (53.8th percentile), this represents normal volume ; whole brain volume measures 970,224 mm³, 5.7% below the reference mean. With a Z-score of -0.75 (22.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,800 mm³, 4.3% below the reference mean. With a Z-score of -0.28 (39.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,838 mm³, 1.3% below the reference mean. With a Z-score of -0.11 (45.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,123 mm³, 0.2% below the reference mean. With a Z-score of -0.02 (49.1th percentile), this represents normal volume . ",
  "text_data": "Age is 84.6 years. Gender is Male. Education: 19 years. MMSE: 30.0. MoCA: 27.0. 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) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 30, MoCA 27) are intact for age, and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T06:13:58.478828"
}