{
  "ptid_time": "041_S_5244_2015-08-06",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5244/2015-08-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,070 mm³, 35.6% below the reference mean. With a Z-score of -0.82 (20.7th percentile), this represents normal volume ; hippocampal volume measures 7,133 mm³, 0.3% above the reference mean. With a Z-score of 0.02 (50.9th percentile), this represents normal volume ; whole brain volume measures 1,044,410 mm³, 7.2% above the reference mean. With a Z-score of 0.90 (81.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,640 mm³, 0.9% below the reference mean. With a Z-score of -0.05 (47.8th percentile), this represents normal volume ; fusiform gyrus volume measures 15,325 mm³, 9.9% below the reference mean. With a Z-score of -0.90 (18.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,780 mm³, 8.4% above the reference mean. With a Z-score of 0.73 (76.7th percentile), this represents normal volume . ",
  "text_data": "Age is 77.8 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.07 SUVR (normal ); Amyloid beta: 1414.00 pg/mL (mild elevated); Total tau: 149.40 pg/mL (mild reduced); Phosphorylated tau: 13.53 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, ventricular, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE, MoCA) are intact, and while Aβ is mildly elevated, tau markers are reduced, and AV45 (amyloid PET) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:27:50.965584"
}