{
  "ptid_time": "129_S_6763_2019-07-15",
  "img_path": "/data/qiuhui/data/adni/images/129_S_6763/2019-07-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,430 mm³, 31.2% below the reference mean. With a Z-score of -0.84 (20.0th percentile), this represents normal volume ; hippocampal volume measures 6,193 mm³, 4.6% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; whole brain volume measures 853,480 mm³, 8.0% below the reference mean. With a Z-score of -0.97 (16.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,292 mm³, 4.9% below the reference mean. With a Z-score of -0.27 (39.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,798 mm³, 1.9% below the reference mean. With a Z-score of -0.15 (44.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,165 mm³, 6.3% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume . ",
  "text_data": "Age is 82.3 years. Gender is Female. Education: 14 years. Handedness: Right. Race: Asian. MMSE: 25.0. MoCA: 19.0. Logical Memory: 2.0. Biomarker levels: Florbetapir (AV45): 1.40 SUVR (significant elevated). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The brain volume measurements (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are within normal ranges, with Z-scores close to the mean. However, the MMSE (25) and MoCA (19) scores suggest mild cognitive impairment, and the elevated AV45 (amyloid PET) indicates significant amyloid pathology, which is consistent with Alzheimer's disease.  \n\nDiagnosis: **Dementia (likely Alzheimer’s disease)**  \nConfidence: **Medium** (due to normal structural volumes but clear cognitive deficits and amyloid positivity)",
  "timestamp": "2025-07-26T14:20:50.891315"
}