{
  "ptid_time": "099_S_2063_2011-04-18",
  "img_path": "/data/qiuhui/data/adni/images/099_S_2063/2011-04-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,460 mm³, 28.1% above the reference mean. With a Z-score of 0.67 (74.8th percentile), this represents normal volume ; hippocampal volume measures 8,421 mm³, 4.9% above the reference mean. With a Z-score of 0.49 (68.8th percentile), this represents normal volume ; whole brain volume measures 1,204,240 mm³, 6.1% above the reference mean. With a Z-score of 0.87 (80.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,127 mm³, 3.2% below the reference mean. With a Z-score of -0.22 (41.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,959 mm³, 0.3% above the reference mean. With a Z-score of 0.02 (50.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,953 mm³, 2.4% above the reference mean. With a Z-score of 0.20 (57.9th percentile), this represents normal volume . ",
  "text_data": "Age is 68.8 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 27.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "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 scores (MMSE 29, MoCA 27) are also within normal limits, with no significant impairment. The presence of one APOE4 allele increases Alzheimer’s risk but does not indicate current pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:02:02.006407"
}