{
  "ptid_time": "127_S_6436_2020-10-07",
  "img_path": "/data/qiuhui/data/adni/images/127_S_6436/2020-10-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,628 mm³, 55.4% above the reference mean. With a Z-score of 1.27 (89.8th percentile), this represents mild enlargement; hippocampal volume measures 6,577 mm³, 7.6% below the reference mean. With a Z-score of -0.69 (24.4th percentile), this represents normal volume ; whole brain volume measures 1,007,600 mm³, 3.4% above the reference mean. With a Z-score of 0.43 (66.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,195 mm³, 14.2% above the reference mean. With a Z-score of 0.87 (80.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,375 mm³, 3.8% below the reference mean. With a Z-score of -0.34 (36.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,226 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.0th percentile), this represents normal volume . ",
  "text_data": "Age is 71.8 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Flobetaben (FBB): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is mildly enlarged (55.4% above mean, Z-score 1.27), but hippocampal volume is within normal limits (7.6% below mean, Z-score -0.69). Cognitive scores (MMSE 29, MoCA 28) are intact, and other brain regions show no significant atrophy. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular enlargement but normal cognition and no hippocampal atrophy)",
  "timestamp": "2025-07-26T13:32:46.886669"
}