{
  "ptid_time": "023_S_0058_2006-12-19",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0058/2006-12-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,632 mm³, 38.6% below the reference mean. With a Z-score of -0.93 (17.7th percentile), this represents normal volume ; hippocampal volume measures 7,952 mm³, 5.2% above the reference mean. With a Z-score of 0.51 (69.4th percentile), this represents normal volume ; whole brain volume measures 1,026,670 mm³, 4.9% below the reference mean. With a Z-score of -0.63 (26.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,194 mm³, 2.3% above the reference mean. With a Z-score of 0.15 (56.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,301 mm³, 8.2% below the reference mean. With a Z-score of -0.70 (24.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,000 mm³, 1.6% below the reference mean. With a Z-score of -0.14 (44.3th percentile), this represents normal volume . ",
  "text_data": "Age is 71.1 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (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 30/30 indicates no cognitive impairment, and the APOE4 status (heterozygous) does not override the absence of structural or functional deficits.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:30:03.709496"
}