{
  "ptid_time": "007_S_0068_2006-06-20",
  "img_path": "/data/qiuhui/data/adni/images/007_S_0068/2006-06-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,162 mm³, 6.8% below the reference mean. With a Z-score of -0.16 (43.8th percentile), this represents normal volume ; hippocampal volume measures 7,332 mm³, 3.1% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume ; whole brain volume measures 935,286 mm³, 4.0% below the reference mean. With a Z-score of -0.51 (30.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,334 mm³, 9.2% below the reference mean. With a Z-score of -0.57 (28.6th percentile), this represents normal volume ; fusiform gyrus volume measures 14,515 mm³, 14.7% below the reference mean. With a Z-score of -1.34 (9.1th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,855 mm³, 14.0% above the reference mean. With a Z-score of 1.22 (88.8th percentile), this represents mild enlargement. ",
  "text_data": "Age is 74.9 years. Gender is Female. Education: 12 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with mild atrophy in the fusiform gyrus and mild enlargement in the middle temporal gyrus. The MMSE score of 30 is within the normal range, and there are no APOE4 alleles, which reduces genetic risk for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild fusiform atrophy, but no other significant abnormalities or cognitive deficits)",
  "timestamp": "2025-07-25T21:43:57.565752"
}