{
  "ptid_time": "041_S_4974_2013-04-23",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4974/2013-04-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,999 mm³, 37.6% above the reference mean. With a Z-score of 0.90 (81.6th percentile), this represents normal volume ; hippocampal volume measures 7,232 mm³, 4.3% below the reference mean. With a Z-score of -0.42 (33.6th percentile), this represents normal volume ; whole brain volume measures 1,193,160 mm³, 10.5% above the reference mean. With a Z-score of 1.37 (91.4th percentile), this represents mild enlargement; entorhinal cortex volume measures 5,237 mm³, 27.7% above the reference mean. With a Z-score of 1.88 (97.0th percentile), this represents moderate enlargement; fusiform gyrus volume measures 22,857 mm³, 21.3% above the reference mean. With a Z-score of 1.82 (96.5th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 22,401 mm³, 5.0% above the reference mean. With a Z-score of 0.45 (67.3th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 19 years. MMSE: 30.0. MoCA: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal hippocampal volume (Z-score -0.42) and mild-to-moderate enlargement in other regions (e.g., entorhinal cortex, fusiform gyrus), which is atypical for Alzheimer's. Cognitive scores (MMSE 30, MoCA 27) are within normal limits, and APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to atypical volumetric findings despite normal cognition)",
  "timestamp": "2025-07-26T07:22:19.677615"
}