{
  "ptid_time": "137_S_4632_2012-08-13",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4632/2012-08-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,312 mm³, 37.6% above the reference mean. With a Z-score of 0.89 (81.4th percentile), this represents normal volume ; hippocampal volume measures 7,738 mm³, 3.6% below the reference mean. With a Z-score of -0.36 (35.9th percentile), this represents normal volume ; whole brain volume measures 1,164,590 mm³, 2.6% above the reference mean. With a Z-score of 0.37 (64.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,579 mm³, 7.4% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume ; fusiform gyrus volume measures 20,280 mm³, 1.9% above the reference mean. With a Z-score of 0.15 (56.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,836 mm³, 1.9% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume . ",
  "text_data": "Age is 67.7 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive screening (MMSE: 29, MoCA: 26) is within normal limits, and amyloid PET (AV45) is normal. No significant atrophy or biomarker evidence of Alzheimer’s pathology is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:40:11.238545"
}