{
  "ptid_time": "130_S_1200_2007-08-15",
  "img_path": "/data/qiuhui/data/adni/images/130_S_1200/2007-08-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 65,904 mm³, 40.2% above the reference mean. With a Z-score of 1.17 (87.8th percentile), this represents mild enlargement; hippocampal volume measures 7,269 mm³, 4.3% above the reference mean. With a Z-score of 0.37 (64.5th percentile), this represents normal volume ; whole brain volume measures 1,113,190 mm³, 8.2% above the reference mean. With a Z-score of 1.07 (85.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,925 mm³, 24.1% above the reference mean. With a Z-score of 1.58 (94.3th percentile), this represents moderate enlargement; fusiform gyrus volume measures 21,601 mm³, 19.6% above the reference mean. With a Z-score of 1.69 (95.5th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 20,039 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.6th percentile), this represents normal volume . ",
  "text_data": "Age is 84.9 years. Gender is Male. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild to moderate enlargement in several regions (ventricular, whole brain, entorhinal cortex, fusiform gyrus) but no significant atrophy, particularly in the hippocampus, which is normal. The MMSE score of 28 is within the normal range (≥26), and the absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to age-related variability in brain volumes despite normal cognition)",
  "timestamp": "2025-07-26T14:34:23.469443"
}