{
  "ptid_time": "041_S_4200_2012-10-17",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4200/2012-10-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,046 mm³, 25.0% below the reference mean. With a Z-score of -0.57 (28.3th percentile), this represents normal volume ; hippocampal volume measures 7,672 mm³, 7.8% above the reference mean. With a Z-score of 0.72 (76.4th percentile), this represents normal volume ; whole brain volume measures 1,066,990 mm³, 9.5% above the reference mean. With a Z-score of 1.19 (88.3th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,048 mm³, 10.2% above the reference mean. With a Z-score of 0.63 (73.5th percentile), this represents normal volume ; fusiform gyrus volume measures 16,392 mm³, 3.7% below the reference mean. With a Z-score of -0.33 (37.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,872 mm³, 19.3% above the reference mean. With a Z-score of 1.68 (95.3th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 71.2 years. Gender is Female. Education: 18 years. MMSE: 27.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures are within normal ranges or show mild-to-moderate enlargement, with no significant atrophy in Alzheimer’s-related regions (hippocampus, entorhinal cortex). Cognitive scores (MMSE 27, MoCA 29) are well within normal limits, and the absence of APOE4 further reduces Alzheimer’s risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:14:48.166829"
}