{
  "ptid_time": "127_S_4645_2012-10-19",
  "img_path": "/data/qiuhui/data/adni/images/127_S_4645/2012-10-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,683 mm³, 41.4% above the reference mean. With a Z-score of 0.95 (82.8th percentile), this represents normal volume ; hippocampal volume measures 7,718 mm³, 8.5% above the reference mean. With a Z-score of 0.78 (78.2th percentile), this represents normal volume ; whole brain volume measures 1,029,670 mm³, 5.6% above the reference mean. With a Z-score of 0.71 (76.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,526 mm³, 4.0% below the reference mean. With a Z-score of -0.25 (40.3th percentile), this represents normal volume ; fusiform gyrus volume measures 17,572 mm³, 3.3% above the reference mean. With a Z-score of 0.30 (61.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,696 mm³, 8.0% above the reference mean. With a Z-score of 0.69 (75.5th percentile), this represents normal volume . ",
  "text_data": "Age is 76.8 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 25.0. APOEε4 alleles: 0.0. ",
  "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 25) are also within normal limits for age, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T13:20:38.478785"
}