{
  "ptid_time": "168_S_6492_2018-08-06",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6492/2018-08-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,734 mm³, 19.7% above the reference mean. With a Z-score of 0.49 (68.9th percentile), this represents normal volume ; hippocampal volume measures 8,624 mm³, 12.2% above the reference mean. With a Z-score of 1.37 (91.5th percentile), this represents mild enlargement; whole brain volume measures 1,097,410 mm³, 6.6% above the reference mean. With a Z-score of 0.83 (79.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,115 mm³, 5.7% above the reference mean. With a Z-score of 0.44 (67.1th percentile), this represents normal volume ; fusiform gyrus volume measures 19,743 mm³, 8.4% above the reference mean. With a Z-score of 0.95 (82.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,971 mm³, 16.8% above the reference mean. With a Z-score of 1.49 (93.3th percentile), this represents mild enlargement. ",
  "text_data": "Age is 69.8 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. MMSE: 29.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.29 SUVR (moderate elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or mildly enlarged structures, with no significant atrophy typically seen in Alzheimer's disease. Cognitive scores (MMSE and MoCA) are within the normal range, and while APOE4 is present (a risk factor), AV45 (amyloid PET) shows only moderate elevation, not strongly indicative of amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to moderate AV45 elevation, but otherwise normal biomarkers and cognition)",
  "timestamp": "2025-07-26T17:21:34.508222"
}