{
  "ptid_time": "018_S_4400_2014-01-28",
  "img_path": "/data/qiuhui/data/adni/images/018_S_4400/2014-01-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,276 mm³, 47.4% below the reference mean. With a Z-score of -1.13 (12.8th percentile), this represents mild atrophy; hippocampal volume measures 8,634 mm³, 14.2% above the reference mean. With a Z-score of 1.39 (91.7th percentile), this represents mild enlargement; whole brain volume measures 1,022,620 mm³, 5.3% below the reference mean. With a Z-score of -0.68 (24.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,149 mm³, 1.2% above the reference mean. With a Z-score of 0.08 (53.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,156 mm³, 3.6% below the reference mean. With a Z-score of -0.31 (37.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,267 mm³, 9.7% below the reference mean. With a Z-score of -0.87 (19.1th percentile), this represents normal volume . ",
  "text_data": "Age is 73.1 years. Gender is Male. Education: 20 years. Handedness: Unknown. Race: Unknown. MMSE: 29.0. MoCA: 27.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.43 SUVR (significant elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The patient shows mild ventricular atrophy (Z-score -1.13) but otherwise normal or even slightly enlarged hippocampal volume (Z-score +1.39). Cognitive scores (MMSE 29, MoCA 27) are within normal limits. Elevated AV45 suggests amyloid pathology, but structural and cognitive findings do not yet indicate significant impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (Amyloid positivity raises concern for future decline, but current metrics are normal.)",
  "timestamp": "2025-07-26T00:58:35.889681"
}