{
  "ptid_time": "128_S_1242_2007-08-16",
  "img_path": "/data/qiuhui/data/adni/images/128_S_1242/2007-08-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,950 mm³, 39.6% below the reference mean. With a Z-score of -0.91 (18.2th percentile), this represents normal volume ; hippocampal volume measures 7,411 mm³, 4.2% above the reference mean. With a Z-score of 0.38 (64.9th percentile), this represents normal volume ; whole brain volume measures 901,197 mm³, 7.5% below the reference mean. With a Z-score of -0.95 (17.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,286 mm³, 16.7% above the reference mean. With a Z-score of 1.02 (84.7th percentile), this represents mild enlargement; fusiform gyrus volume measures 15,766 mm³, 7.3% below the reference mean. With a Z-score of -0.67 (25.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,341 mm³, 14.8% below the reference mean. With a Z-score of -1.28 (10.0th percentile), this represents mild atrophy. ",
  "text_data": "Age is 71.6 years. Gender is Female. Education: 19 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measures are largely within normal ranges, with only mild enlargement in the entorhinal cortex and mild atrophy in the middle temporal gyrus. The MMSE score of 30 is intact, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy is seen in key Alzheimer’s regions (hippocampus, whole brain).  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T13:53:49.168412"
}