{
  "ptid_time": "141_S_0717_2012-08-30",
  "img_path": "/data/qiuhui/data/adni/images/141_S_0717/2012-08-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 50,311 mm³, 7.0% above the reference mean. With a Z-score of 0.20 (58.1th percentile), this represents normal volume ; hippocampal volume measures 7,803 mm³, 12.0% above the reference mean. With a Z-score of 1.04 (85.0th percentile), this represents mild enlargement; whole brain volume measures 1,114,980 mm³, 8.3% above the reference mean. With a Z-score of 1.09 (86.3th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,231 mm³, 6.6% above the reference mean. With a Z-score of 0.43 (66.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,087 mm³, 5.7% above the reference mean. With a Z-score of 0.49 (68.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,897 mm³, 11.3% below the reference mean. With a Z-score of -1.01 (15.6th percentile), this represents mild atrophy. ",
  "text_data": "Age is 82.0 years. Gender is Male. Education: 12 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.20 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild atrophy in the middle temporal gyrus but otherwise normal or mildly enlarged volumes in other regions, including the hippocampus. Cognitive scores (MMSE 29, MoCA 25) are within normal limits for age, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:47:25.922369"
}