{
  "ptid_time": "114_S_6524_2018-10-18",
  "img_path": "/data/qiuhui/data/adni/images/114_S_6524/2018-10-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,103 mm³, 3.4% above the reference mean. With a Z-score of 0.09 (53.4th percentile), this represents normal volume ; hippocampal volume measures 7,667 mm³, 0.2% below the reference mean. With a Z-score of -0.03 (49.0th percentile), this represents normal volume ; whole brain volume measures 997,048 mm³, 3.1% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,269 mm³, 9.7% above the reference mean. With a Z-score of 0.75 (77.3th percentile), this represents normal volume ; fusiform gyrus volume measures 16,822 mm³, 7.6% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,046 mm³, 2.3% below the reference mean. With a Z-score of -0.21 (41.9th percentile), this represents normal volume . ",
  "text_data": "Age is 66.4 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.97 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 30, MoCA 27) are intact, and amyloid PET (AV45) is normal. No significant atrophy or biomarker evidence of Alzheimer’s pathology is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:50:28.458495"
}