{
  "ptid_time": "009_S_0842_2007-04-10",
  "img_path": "/data/qiuhui/data/adni/images/009_S_0842/2007-04-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,331 mm³, 5.7% below the reference mean. With a Z-score of -0.14 (44.6th percentile), this represents normal volume ; hippocampal volume measures 7,898 mm³, 4.5% above the reference mean. With a Z-score of 0.44 (66.9th percentile), this represents normal volume ; whole brain volume measures 1,128,140 mm³, 4.5% above the reference mean. With a Z-score of 0.59 (72.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,797 mm³, 7.4% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; fusiform gyrus volume measures 18,819 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,289 mm³, 18.5% above the reference mean. With a Z-score of 1.66 (95.2th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 74.1 years. Gender is Male. Education: 18 years. MMSE: 30.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges, with the middle temporal gyrus showing moderate enlargement but no atrophy. The MMSE score of 30/30 indicates no cognitive impairment, and APOE4 status (heterozygous) does not override the absence of structural or clinical deficits.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:12:17.858044"
}