{
  "ptid_time": "057_S_0779_2007-03-14",
  "img_path": "/data/qiuhui/data/adni/images/057_S_0779/2007-03-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,473 mm³, 1.0% above the reference mean. With a Z-score of 0.03 (51.1th percentile), this represents normal volume ; hippocampal volume measures 7,529 mm³, 8.0% above the reference mean. With a Z-score of 0.70 (75.7th percentile), this represents normal volume ; whole brain volume measures 1,061,700 mm³, 3.2% above the reference mean. With a Z-score of 0.41 (66.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,701 mm³, 6.8% below the reference mean. With a Z-score of -0.44 (32.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,237 mm³, 6.5% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,404 mm³, 8.8% below the reference mean. With a Z-score of -0.79 (21.6th percentile), this represents normal volume . ",
  "text_data": "Age is 80.0 years. Gender is Male. Education: 13 years. MMSE: 29.0. 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) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 29/30 indicates intact cognitive function, and while APOE4 is a risk factor, there is no structural or clinical evidence of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T08:04:29.379787"
}