{
  "ptid_time": "057_S_5292_2018-09-12",
  "img_path": "/data/qiuhui/data/adni/images/057_S_5292/2018-09-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,255 mm³, 13.6% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume ; hippocampal volume measures 6,578 mm³, 7.5% below the reference mean. With a Z-score of -0.69 (24.4th percentile), this represents normal volume ; whole brain volume measures 938,980 mm³, 3.7% below the reference mean. With a Z-score of -0.46 (32.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,839 mm³, 4.5% above the reference mean. With a Z-score of 0.28 (60.9th percentile), this represents normal volume ; fusiform gyrus volume measures 15,473 mm³, 9.1% below the reference mean. With a Z-score of -0.82 (20.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,676 mm³, 7.8% below the reference mean. With a Z-score of -0.68 (24.9th percentile), this represents normal volume . ",
  "text_data": "Age is 79.3 years. Gender is Female. Education: 13 years. MMSE: 29.0. MoCA: 30.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.57 SUVR (profound elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 29, MoCA 30) are intact, and there is no APOE4 genetic risk. However, AV45 (amyloid PET) shows profound elevation, indicating significant amyloid deposition.  \n\nDiagnosis: **MCI** (due to biomarker evidence of amyloid pathology despite normal cognition and brain volumes)  \nConfidence: **Medium** (cognitive performance is preserved, but amyloid burden suggests early neurodegenerative changes)",
  "timestamp": "2025-07-26T08:15:25.780961"
}