{
  "ptid_time": "127_S_5132_2017-05-18",
  "img_path": "/data/qiuhui/data/adni/images/127_S_5132/2017-05-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,205 mm³, 31.6% below the reference mean. With a Z-score of -0.72 (23.5th percentile), this represents normal volume ; hippocampal volume measures 7,735 mm³, 8.7% above the reference mean. With a Z-score of 0.80 (78.8th percentile), this represents normal volume ; whole brain volume measures 998,753 mm³, 2.5% above the reference mean. With a Z-score of 0.31 (62.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,600 mm³, 2.0% below the reference mean. With a Z-score of -0.12 (45.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,598 mm³, 9.3% above the reference mean. With a Z-score of 0.85 (80.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,330 mm³, 6.1% above the reference mean. With a Z-score of 0.53 (70.0th percentile), this represents normal volume . ",
  "text_data": "Age is 73.3 years. Gender is Female. Education: 12 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.28 SUVR (moderate elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 29, MoCA 27) are also normal, and there is no APOE4 genetic risk. The moderate AV45 (amyloid) elevation suggests some amyloid pathology but is not accompanied by structural or cognitive decline.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to moderate amyloid elevation, but no supporting evidence of cognitive or structural impairment)",
  "timestamp": "2025-07-26T13:26:42.880337"
}