{
  "ptid_time": "022_S_2379_2019-06-05",
  "img_path": "/data/qiuhui/data/adni/images/022_S_2379/2019-06-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,661 mm³, 23.0% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; hippocampal volume measures 9,086 mm³, 20.2% above the reference mean. With a Z-score of 1.97 (97.6th percentile), this represents moderate enlargement; whole brain volume measures 1,130,430 mm³, 4.7% above the reference mean. With a Z-score of 0.61 (73.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,153 mm³, 1.3% above the reference mean. With a Z-score of 0.09 (53.5th percentile), this represents normal volume ; fusiform gyrus volume measures 23,663 mm³, 25.6% above the reference mean. With a Z-score of 2.18 (98.5th percentile), this represents significant enlargement; middle temporal gyrus volume measures 22,893 mm³, 7.3% above the reference mean. With a Z-score of 0.65 (74.4th percentile), this represents normal volume . ",
  "text_data": "Age is 74.0 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.12 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-normal volumes in key regions, including the hippocampus and fusiform gyrus, with no significant atrophy. Cognitive scores (MMSE 29, MoCA 27) are within normal ranges, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:16:50.140647"
}