{
  "ptid_time": "137_S_0301_2008-05-06",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0301/2008-05-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,892 mm³, 57.6% below the reference mean. With a Z-score of -1.32 (9.3th percentile), this represents mild atrophy; hippocampal volume measures 7,695 mm³, 8.2% above the reference mean. With a Z-score of 0.75 (77.3th percentile), this represents normal volume ; whole brain volume measures 985,518 mm³, 1.1% above the reference mean. With a Z-score of 0.14 (55.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,945 mm³, 7.4% above the reference mean. With a Z-score of 0.45 (67.5th percentile), this represents normal volume ; fusiform gyrus volume measures 14,924 mm³, 12.3% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,980 mm³, 6.2% below the reference mean. With a Z-score of -0.54 (29.5th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Female. Education: 13 years. MMSE: 28.0. Logical Memory: 18.0. Laboratory findings: Creatinine (Rate Blanked): 1.40 (significant elevated). APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the ventricular volume and fusiform gyrus, but hippocampal, whole brain, entorhinal cortex, and middle temporal gyrus volumes are within normal ranges. The MMSE score of 28 is within the normal range, and the absence of APOE4 alleles reduces genetic risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (While mild atrophy is present in some regions, the preserved hippocampal volume and normal cognitive scores suggest no significant impairment. However, mild atrophy warrants monitoring.)",
  "timestamp": "2025-07-26T16:08:29.611599"
}