{
  "ptid_time": "029_S_0866_2007-04-12",
  "img_path": "/data/qiuhui/data/adni/images/029_S_0866/2007-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,612 mm³, 22.6% below the reference mean. With a Z-score of -0.61 (27.1th percentile), this represents normal volume ; hippocampal volume measures 6,763 mm³, 4.1% above the reference mean. With a Z-score of 0.33 (63.0th percentile), this represents normal volume ; whole brain volume measures 951,726 mm³, 2.5% above the reference mean. With a Z-score of 0.30 (62.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,207 mm³, 7.4% below the reference mean. With a Z-score of -0.40 (34.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,312 mm³, 7.5% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,233 mm³, 4.4% below the reference mean. With a Z-score of -0.39 (34.7th percentile), this represents normal volume . ",
  "text_data": "Age is 80.5 years. Gender is Female. Education: 13 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volume measures (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 29 is within the normal range (≥26), and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T04:18:42.001625"
}