{
  "ptid_time": "137_S_0668_2007-03-08",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0668/2007-03-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,420 mm³, 26.2% below the reference mean. With a Z-score of -0.63 (26.5th percentile), this represents normal volume ; hippocampal volume measures 7,913 mm³, 4.7% above the reference mean. With a Z-score of 0.46 (67.6th percentile), this represents normal volume ; whole brain volume measures 970,283 mm³, 10.1% below the reference mean. With a Z-score of -1.31 (9.5th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,826 mm³, 6.7% below the reference mean. With a Z-score of -0.45 (32.5th percentile), this represents normal volume ; fusiform gyrus volume measures 16,366 mm³, 13.1% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,198 mm³, 14.7% below the reference mean. With a Z-score of -1.32 (9.3th percentile), this represents mild atrophy. ",
  "text_data": "Age is 74.0 years. Gender is Male. Education: 12 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the whole brain, fusiform gyrus, and middle temporal gyrus, but hippocampal and ventricular volumes are normal. The MMSE score of 29 is within the normal range, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild atrophy in some regions could suggest early changes, but cognitive performance remains intact)",
  "timestamp": "2025-07-26T16:13:05.433469"
}