{
  "ptid_time": "099_S_4565_2012-06-19",
  "img_path": "/data/qiuhui/data/adni/images/099_S_4565/2012-06-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,004 mm³, 57.5% below the reference mean. With a Z-score of -1.67 (4.8th percentile), this represents moderate atrophy; hippocampal volume measures 6,989 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.0th percentile), this represents normal volume ; whole brain volume measures 984,410 mm³, 4.3% below the reference mean. With a Z-score of -0.57 (28.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,541 mm³, 10.8% below the reference mean. With a Z-score of -0.71 (24.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,234 mm³, 4.6% below the reference mean. With a Z-score of -0.40 (34.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,279 mm³, 9.4% below the reference mean. With a Z-score of -0.84 (20.0th percentile), this represents normal volume . ",
  "text_data": "Age is 82.4 years. Gender is Male. Education: 12 years. Handedness: Right. Race: White. Medical history: Psychiatric; Cardiovascular; Gastrointestinal; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 28.0. MoCA: 25.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.25 SUVR (mild elevated); Amyloid beta: 495.80 pg/mL (mild reduced); Total tau: 172.00 pg/mL (normal ); Phosphorylated tau: 16.72 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows moderate ventricular atrophy but otherwise normal hippocampal and whole brain volumes, with only mild reductions in other regions. Cognitive scores (MMSE 28, MoCA 25) are within normal limits for age, and biomarkers (Aβ mildly reduced, AV45 mildly elevated) suggest early amyloid deposition but no significant tauopathy.  \n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to mild amyloid changes but preserved cognition and no significant atrophy beyond age-expected levels)",
  "timestamp": "2025-07-26T11:10:26.081494"
}