{
  "ptid_time": "082_S_4090_2012-01-04",
  "img_path": "/data/qiuhui/data/adni/images/082_S_4090/2012-01-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,515 mm³, 28.6% below the reference mean. With a Z-score of -0.68 (24.7th percentile), this represents normal volume ; hippocampal volume measures 7,751 mm³, 2.5% above the reference mean. With a Z-score of 0.25 (59.8th percentile), this represents normal volume ; whole brain volume measures 1,060,660 mm³, 1.7% below the reference mean. With a Z-score of -0.23 (41.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,970 mm³, 3.2% below the reference mean. With a Z-score of -0.22 (41.5th percentile), this represents normal volume ; fusiform gyrus volume measures 19,374 mm³, 2.8% above the reference mean. With a Z-score of 0.24 (59.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,159 mm³, 0.8% below the reference mean. With a Z-score of -0.08 (47.0th percentile), this represents normal volume . ",
  "text_data": "Age is 71.9 years. Gender is Male. Education: 20 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, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive testing (MMSE 30, MoCA 27) is also normal for age, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:04:57.115588"
}