{
  "ptid_time": "033_S_5259_2017-12-05",
  "img_path": "/data/qiuhui/data/adni/images/033_S_5259/2017-12-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,701 mm³, 46.7% below the reference mean. With a Z-score of -1.26 (10.4th percentile), this represents mild atrophy; hippocampal volume measures 6,973 mm³, 7.4% above the reference mean. With a Z-score of 0.59 (72.2th percentile), this represents normal volume ; whole brain volume measures 1,002,920 mm³, 8.1% above the reference mean. With a Z-score of 0.97 (83.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,475 mm³, 0.4% above the reference mean. With a Z-score of 0.02 (50.8th percentile), this represents normal volume ; fusiform gyrus volume measures 16,568 mm³, 2.8% above the reference mean. With a Z-score of 0.21 (58.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,969 mm³, 5.2% above the reference mean. With a Z-score of 0.46 (67.9th percentile), this represents normal volume . ",
  "text_data": "Age is 83.3 years. Gender is Female. Education: 18 years. MMSE: 27.0. MoCA: 26.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.14 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 27, MoCA 26) are within normal limits for age, and there is no genetic (APOE4-negative) or amyloid (AV45-normal) risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T05:39:35.486088"
}