{
  "ptid_time": "129_S_4369_2019-06-13",
  "img_path": "/data/qiuhui/data/adni/images/129_S_4369/2019-06-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,181 mm³, 58.0% below the reference mean. With a Z-score of -1.39 (8.2th percentile), this represents mild atrophy; hippocampal volume measures 6,913 mm³, 8.5% below the reference mean. With a Z-score of -0.83 (20.2th percentile), this represents normal volume ; whole brain volume measures 1,004,560 mm³, 6.9% below the reference mean. With a Z-score of -0.90 (18.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,026 mm³, 1.8% below the reference mean. With a Z-score of -0.12 (45.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,598 mm³, 6.6% below the reference mean. With a Z-score of -0.56 (28.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,302 mm³, 4.9% below the reference mean. With a Z-score of -0.44 (33.1th percentile), this represents normal volume . ",
  "text_data": "Age is 75.8 years. Gender is Male. Education: 20 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild ventricular atrophy but otherwise normal brain volumes, including the hippocampus and other key regions. Cognitive scores (MMSE 29, MoCA 25) are within normal limits, and there is no significant biomarker evidence of Alzheimer's pathology (APOE4-negative, normal AV45).  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T14:16:03.485394"
}