{
  "ptid_time": "023_S_0926_2008-10-21",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0926/2008-10-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,656 mm³, 5.7% above the reference mean. With a Z-score of 0.13 (55.2th percentile), this represents normal volume ; hippocampal volume measures 6,943 mm³, 2.4% below the reference mean. With a Z-score of -0.22 (41.2th percentile), this represents normal volume ; whole brain volume measures 1,004,260 mm³, 3.0% above the reference mean. With a Z-score of 0.38 (64.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,591 mm³, 2.2% below the reference mean. With a Z-score of -0.14 (44.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,349 mm³, 13.7% above the reference mean. With a Z-score of 1.25 (89.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 18,283 mm³, 4.6% below the reference mean. With a Z-score of -0.40 (34.4th percentile), this represents normal volume . ",
  "text_data": "Age is 73.4 years. Gender is Female. Education: 16 years. MMSE: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) are within normal ranges, with only mild deviations (fusiform gyrus slightly enlarged). The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:50:08.362751"
}