{
  "ptid_time": "137_S_0668_2012-08-22",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0668/2012-08-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,696 mm³, 12.5% below the reference mean. With a Z-score of -0.30 (38.2th percentile), this represents normal volume ; hippocampal volume measures 7,709 mm³, 2.0% above the reference mean. With a Z-score of 0.19 (57.7th percentile), this represents normal volume ; whole brain volume measures 1,007,520 mm³, 6.7% below the reference mean. With a Z-score of -0.86 (19.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,493 mm³, 9.6% above the reference mean. With a Z-score of 0.65 (74.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,874 mm³, 0.2% above the reference mean. With a Z-score of 0.02 (50.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,441 mm³, 13.6% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy. ",
  "text_data": "Age is 79.5 years. Gender is Male. Education: 12 years. MMSE: 26.0. MoCA: 25.0. Logical Memory: 5.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges except for mild atrophy in the middle temporal gyrus. Cognitive scores (MMSE 26, MoCA 25) are borderline but not definitively impaired. No genetic (APOE4-negative) or amyloid (AV45-normal) risk factors are present.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild temporal atrophy but otherwise normal biomarkers and borderline cognitive scores)",
  "timestamp": "2025-07-26T16:13:54.279689"
}