{
  "ptid_time": "073_S_0746_2009-02-09",
  "img_path": "/data/qiuhui/data/adni/images/073_S_0746/2009-02-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,371 mm³, 11.8% above the reference mean. With a Z-score of 0.27 (60.6th percentile), this represents normal volume ; hippocampal volume measures 6,771 mm³, 4.8% below the reference mean. With a Z-score of -0.44 (32.9th percentile), this represents normal volume ; whole brain volume measures 992,577 mm³, 1.8% above the reference mean. With a Z-score of 0.23 (59.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,621 mm³, 1.4% below the reference mean. With a Z-score of -0.09 (46.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,444 mm³, 2.5% above the reference mean. With a Z-score of 0.23 (59.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,866 mm³, 1.6% below the reference mean. With a Z-score of -0.14 (44.5th percentile), this represents normal volume . ",
  "text_data": "Age is 75.8 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "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 absence of APOE4 alleles reduces genetic risk for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T09:34:23.803459"
}