{
  "ptid_time": "020_S_6449_2018-07-06",
  "img_path": "/data/qiuhui/data/adni/images/020_S_6449/2018-07-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,586 mm³, 14.5% above the reference mean. With a Z-score of 0.36 (64.2th percentile), this represents normal volume ; hippocampal volume measures 7,097 mm³, 7.6% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; whole brain volume measures 1,026,850 mm³, 0.2% below the reference mean. With a Z-score of -0.03 (48.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,375 mm³, 12.4% above the reference mean. With a Z-score of 0.96 (83.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,624 mm³, 2.3% above the reference mean. With a Z-score of 0.26 (60.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,324 mm³, 10.7% below the reference mean. With a Z-score of -0.95 (17.1th percentile), this represents normal volume . ",
  "text_data": "Age is 65.9 years. Gender is Female. Education: 19 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 28.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. Biomarker levels: Flobetaben (FBB): 1.01 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive testing (MMSE 30, MoCA 28) is intact, and there are no clinical signs of impairment. The presence of one APOE4 allele increases Alzheimer's risk but does not indicate current pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T01:18:33.887387"
}