{
  "ptid_time": "005_S_0553_2007-01-04",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0553/2007-01-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,642 mm³, 17.8% below the reference mean. With a Z-score of -0.52 (30.2th percentile), this represents normal volume ; hippocampal volume measures 7,641 mm³, 9.7% above the reference mean. With a Z-score of 0.83 (79.8th percentile), this represents normal volume ; whole brain volume measures 1,010,340 mm³, 1.8% below the reference mean. With a Z-score of -0.24 (40.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,618 mm³, 8.8% below the reference mean. With a Z-score of -0.58 (28.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,301 mm³, 9.8% below the reference mean. With a Z-score of -0.85 (19.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,022 mm³, 4.2% above the reference mean. With a Z-score of 0.38 (64.7th percentile), this represents normal volume . ",
  "text_data": "Age is 85.1 years. Gender is Male. Education: 18 years. MMSE: 29.0. 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 29 is within the normal range (≥26), and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-25T21:09:15.088626"
}