{
  "ptid_time": "100_S_5280_2015-09-29",
  "img_path": "/data/qiuhui/data/adni/images/100_S_5280/2015-09-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,983 mm³, 23.2% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; hippocampal volume measures 8,084 mm³, 0.7% above the reference mean. With a Z-score of 0.07 (52.8th percentile), this represents normal volume ; whole brain volume measures 1,137,490 mm³, 0.3% above the reference mean. With a Z-score of 0.04 (51.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,353 mm³, 2.1% above the reference mean. With a Z-score of 0.15 (55.8th percentile), this represents normal volume ; fusiform gyrus volume measures 19,974 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,984 mm³, 6.4% below the reference mean. With a Z-score of -0.52 (30.0th percentile), this represents normal volume . ",
  "text_data": "Age is 69.5 years. Gender is Male. Education: 16 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive testing (MMSE: 30, MoCA: 27) shows no significant impairment, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:27:32.276716"
}