{
  "ptid_time": "041_S_6785_2020-10-28",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6785/2020-10-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,426 mm³, 0.4% above the reference mean. With a Z-score of 0.01 (50.4th percentile), this represents normal volume ; hippocampal volume measures 7,418 mm³, 3.5% below the reference mean. With a Z-score of -0.39 (34.8th percentile), this represents normal volume ; whole brain volume measures 927,277 mm³, 9.9% below the reference mean. With a Z-score of -1.23 (10.9th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,605 mm³, 7.4% below the reference mean. With a Z-score of -0.57 (28.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,003 mm³, 4.4% above the reference mean. With a Z-score of 0.49 (68.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,655 mm³, 14.0% below the reference mean. With a Z-score of -1.24 (10.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 66.0 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the whole brain and middle temporal gyrus, but hippocampal and entorhinal cortex volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild atrophy in some regions could suggest early changes, but cognitive performance remains strong with no significant memory-related atrophy).",
  "timestamp": "2025-07-26T07:30:28.495039"
}