{
  "ptid_time": "005_S_0602_2017-10-30",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0602/2017-10-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,332 mm³, 31.2% below the reference mean. With a Z-score of -0.91 (18.2th percentile), this represents normal volume ; hippocampal volume measures 7,809 mm³, 12.1% above the reference mean. With a Z-score of 1.04 (85.2th percentile), this represents mild enlargement; whole brain volume measures 1,034,200 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,501 mm³, 11.8% below the reference mean. With a Z-score of -0.77 (22.0th percentile), this represents normal volume ; fusiform gyrus volume measures 18,994 mm³, 5.1% above the reference mean. With a Z-score of 0.44 (67.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,218 mm³, 5.2% above the reference mean. With a Z-score of 0.46 (67.9th percentile), this represents normal volume . ",
  "text_data": "Age is 82.2 years. Gender is Male. Education: 17 years. MMSE: 27.0. MoCA: 24.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.08 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (e.g., slightly enlarged hippocampus, slightly reduced entorhinal cortex). Cognitive scores (MMSE 27, MoCA 24) are borderline for mild cognitive impairment (MCI) but not dementia. No significant amyloid pathology (AV45 normal) or genetic risk (APOE4 negative) further reduces Alzheimer's likelihood.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to borderline MoCA score, but no strong structural or biomarker evidence of decline)",
  "timestamp": "2025-07-25T21:14:07.230447"
}