{
  "ptid_time": "018_S_0043_2006-08-10",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0043/2006-08-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,846 mm³, 12.1% below the reference mean. With a Z-score of -0.29 (38.6th percentile), this represents normal volume ; hippocampal volume measures 7,502 mm³, 0.8% below the reference mean. With a Z-score of -0.07 (47.1th percentile), this represents normal volume ; whole brain volume measures 1,028,260 mm³, 4.7% below the reference mean. With a Z-score of -0.62 (26.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,948 mm³, 3.7% below the reference mean. With a Z-score of -0.25 (40.0th percentile), this represents normal volume ; fusiform gyrus volume measures 19,066 mm³, 1.2% above the reference mean. With a Z-score of 0.10 (54.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,573 mm³, 8.3% below the reference mean. With a Z-score of -0.74 (22.8th percentile), this represents normal volume . ",
  "text_data": "Age is 76.7 years. Gender is Male. Education: 16 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "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 is optimal, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T00:41:34.845946"
}