{
  "ptid_time": "094_S_0526_2007-05-22",
  "img_path": "/data/qiuhui/data/adni/images/094_S_0526/2007-05-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,500 mm³, 47.2% below the reference mean. With a Z-score of -1.28 (10.1th percentile), this represents mild atrophy; hippocampal volume measures 6,128 mm³, 5.7% below the reference mean. With a Z-score of -0.45 (32.5th percentile), this represents normal volume ; whole brain volume measures 828,024 mm³, 10.8% below the reference mean. With a Z-score of -1.30 (9.8th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,099 mm³, 10.5% below the reference mean. With a Z-score of -0.57 (28.5th percentile), this represents normal volume ; fusiform gyrus volume measures 11,392 mm³, 29.3% below the reference mean. With a Z-score of -2.20 (1.4th percentile), this represents significant atrophy; middle temporal gyrus volume measures 14,919 mm³, 17.2% below the reference mean. With a Z-score of -1.54 (6.2th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 86.1 years. Gender is Female. Education: 7 years. MMSE: 28.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.13 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild to moderate atrophy in several regions (ventricular, whole brain, fusiform gyrus, middle temporal gyrus), but hippocampal and entorhinal cortex volumes are within normal limits. The MMSE score of 28 is normal, and there is no APOE4 risk allele. Given the age (86.1), some atrophy is expected, but cognitive performance remains intact.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mixed atrophy findings but preserved cognition and no APOE4 risk)",
  "timestamp": "2025-07-26T10:12:04.751115"
}