{
  "ptid_time": "022_S_4320_2013-02-22",
  "img_path": "/data/qiuhui/data/adni/images/022_S_4320/2013-02-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,074 mm³, 42.8% above the reference mean. With a Z-score of 0.98 (83.6th percentile), this represents normal volume ; hippocampal volume measures 8,703 mm³, 22.3% above the reference mean. With a Z-score of 2.05 (98.0th percentile), this represents significant enlargement; whole brain volume measures 1,029,820 mm³, 5.7% above the reference mean. With a Z-score of 0.71 (76.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,530 mm³, 3.9% below the reference mean. With a Z-score of -0.24 (40.6th percentile), this represents normal volume ; fusiform gyrus volume measures 16,014 mm³, 5.9% below the reference mean. With a Z-score of -0.53 (29.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,827 mm³, 13.9% above the reference mean. With a Z-score of 1.20 (88.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 71.7 years. Gender is Female. Education: 12 years. MMSE: 29.0. MoCA: 29.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-average volumes in most regions, including the hippocampus (significant enlargement) and middle temporal gyrus (mild enlargement). The entorhinal cortex and fusiform gyrus are slightly below average but still within normal ranges. Cognitive scores (MMSE and MoCA) are both 29/30, indicating no significant impairment, and the absence of APOE4 reduces genetic risk for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:20:16.557073"
}