{
  "ptid_time": "021_S_4276_2012-05-10",
  "img_path": "/data/qiuhui/data/adni/images/021_S_4276/2012-05-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,579 mm³, 12.4% below the reference mean. With a Z-score of -0.28 (38.8th percentile), this represents normal volume ; hippocampal volume measures 7,060 mm³, 0.8% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume ; whole brain volume measures 1,025,550 mm³, 5.2% above the reference mean. With a Z-score of 0.66 (74.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,711 mm³, 1.0% above the reference mean. With a Z-score of 0.06 (52.5th percentile), this represents normal volume ; fusiform gyrus volume measures 18,294 mm³, 7.5% above the reference mean. With a Z-score of 0.69 (75.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,051 mm³, 5.8% below the reference mean. With a Z-score of -0.51 (30.6th percentile), this represents normal volume . ",
  "text_data": "Age is 74.4 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 26.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive screening scores (MMSE 30, MoCA 26) are also within normal limits, though MoCA is slightly lower but not indicative of impairment. APOE4 carrier status increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T01:43:19.418070"
}