{
  "ptid_time": "002_S_0685_2007-01-22",
  "img_path": "/data/qiuhui/data/adni/images/002_S_0685/2007-01-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,848 mm³, 6.6% below the reference mean. With a Z-score of -1.04 (14.9th percentile), this represents mild atrophy; hippocampal volume measures 7,292 mm³, 3.6% above the reference mean. With a Z-score of 1.99 (97.7th percentile), this represents moderate enlargement; whole brain volume measures 1,008,790 mm³, 10.9% above the reference mean. With a Z-score of 1.22 (88.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,155 mm³, 9.6% above the reference mean. With a Z-score of 0.88 (81.1th percentile), this represents normal volume ; fusiform gyrus volume measures 15,560 mm³, 6.2% above the reference mean. With a Z-score of 0.79 (78.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,268 mm³, 1.2% above the reference mean. With a Z-score of 0.61 (73.0th percentile), this represents normal volume . ",
  "text_data": "Age is 90.1 years. Gender is Female. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal-to-above-average volumes in key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus). The MMSE score of 29/30 is within the normal range, and the absence of APOE4 alleles reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:03:33.553387"
}