{
  "ptid_time": "116_S_4199_2018-04-11",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4199/2018-04-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,825 mm³, 2.7% above the reference mean. With a Z-score of 0.06 (52.5th percentile), this represents normal volume ; hippocampal volume measures 8,007 mm³, 0.2% below the reference mean. With a Z-score of -0.02 (49.0th percentile), this represents normal volume ; whole brain volume measures 1,056,060 mm³, 6.9% below the reference mean. With a Z-score of -0.98 (16.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,597 mm³, 7.8% above the reference mean. With a Z-score of 0.54 (70.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,297 mm³, 3.1% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,376 mm³, 0.2% below the reference mean. With a Z-score of -0.01 (49.5th percentile), this represents normal volume . ",
  "text_data": "Age is 65.5 years. Gender is Male. Education: 16 years. MMSE: 26.0. MoCA: 25.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) all fall within normal ranges based on Z-scores and percentiles. Cognitive screening scores (MMSE: 26, MoCA: 25) are within normal limits for age, and there is no evidence of amyloid pathology (AV45: normal). APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:10:13.875527"
}