{
  "ptid_time": "020_S_5140_2013-04-22",
  "img_path": "/data/qiuhui/data/adni/images/020_S_5140/2013-04-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,157 mm³, 28.2% below the reference mean. With a Z-score of -0.65 (25.9th percentile), this represents normal volume ; hippocampal volume measures 8,714 mm³, 22.5% above the reference mean. With a Z-score of 2.06 (98.0th percentile), this represents significant enlargement; whole brain volume measures 996,577 mm³, 2.2% above the reference mean. With a Z-score of 0.28 (61.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,754 mm³, 2.2% above the reference mean. With a Z-score of 0.14 (55.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,238 mm³, 1.3% above the reference mean. With a Z-score of 0.12 (54.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,129 mm³, 10.6% below the reference mean. With a Z-score of -0.92 (17.8th percentile), this represents normal volume . ",
  "text_data": "Age is 70.3 years. Gender is Female. Education: 18 years. Handedness: Left. Race: More than one race. Medical history: Cardiovascular; Musculoskeletal; Endocrine-Metabolic; Major Surgical Procedures. MMSE: 29.0. MoCA: 28.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.11 SUVR (normal ); Amyloid beta: 924.70 pg/mL (normal ); Total tau: 106.70 pg/mL (moderate reduced); Phosphorylated tau: 9.96 pg/mL (moderate reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-normal values, particularly with significant hippocampal enlargement (98th percentile). Cognitive scores (MMSE 29, MoCA 28) are intact, and biomarkers (Aβ normal, reduced tau) do not suggest Alzheimer's pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T01:14:20.897233"
}