{
  "ptid_time": "109_S_4455_2014-02-12",
  "img_path": "/data/qiuhui/data/adni/images/109_S_4455/2014-02-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,927 mm³, 10.3% below the reference mean. With a Z-score of -0.25 (40.3th percentile), this represents normal volume ; hippocampal volume measures 7,780 mm³, 3.1% below the reference mean. With a Z-score of -0.31 (37.9th percentile), this represents normal volume ; whole brain volume measures 1,145,110 mm³, 0.9% above the reference mean. With a Z-score of 0.13 (55.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,113 mm³, 3.5% below the reference mean. With a Z-score of -0.24 (40.4th percentile), this represents normal volume ; fusiform gyrus volume measures 21,224 mm³, 6.6% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,690 mm³, 1.2% above the reference mean. With a Z-score of 0.10 (54.1th percentile), this represents normal volume . ",
  "text_data": "Age is 66.2 years. Gender is Male. Education: 18 years. MMSE: 26.0. MoCA: 24.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.95 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "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. Cognitive scores (MMSE 26, MoCA 24) are slightly below optimal but not in the dementia range. APOE4-negative status and mild AV45 reduction suggest low amyloid burden.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline cognitive scores, but normal imaging and biomarkers support CN)",
  "timestamp": "2025-07-26T11:33:56.234604"
}