{
  "ptid_time": "168_S_6233_2020-10-13",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6233/2020-10-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,551 mm³, 37.5% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; hippocampal volume measures 7,719 mm³, 8.5% above the reference mean. With a Z-score of 0.78 (78.2th percentile), this represents normal volume ; whole brain volume measures 1,021,180 mm³, 4.8% above the reference mean. With a Z-score of 0.60 (72.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,087 mm³, 11.3% above the reference mean. With a Z-score of 0.69 (75.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,478 mm³, 14.5% above the reference mean. With a Z-score of 1.32 (90.6th percentile), this represents mild enlargement; middle temporal gyrus volume measures 21,617 mm³, 12.8% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 78.9 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 24.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.18 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. MMSE (29/30) is normal, but MoCA (24/30) suggests mild cognitive impairment (MCI). No APOE4 or amyloid pathology (AV45 normal) reduces Alzheimer's risk.  \n\n**Diagnosis:** **MCI** (due to MoCA score despite normal imaging and biomarkers)  \n**Confidence:** **Medium** (imaging does not support neurodegeneration, but MoCA indicates cognitive decline)",
  "timestamp": "2025-07-26T17:18:59.106160"
}