{
  "ptid_time": "116_S_6133_2019-01-29",
  "img_path": "/data/qiuhui/data/adni/images/116_S_6133/2019-01-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,084 mm³, 46.3% below the reference mean. With a Z-score of -1.06 (14.5th percentile), this represents mild atrophy; hippocampal volume measures 7,112 mm³, 0.0% below the reference mean. With a Z-score of -0.00 (49.9th percentile), this represents normal volume ; whole brain volume measures 977,364 mm³, 0.3% above the reference mean. With a Z-score of 0.04 (51.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,951 mm³, 7.6% above the reference mean. With a Z-score of 0.46 (67.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,482 mm³, 3.1% below the reference mean. With a Z-score of -0.28 (38.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,931 mm³, 1.2% below the reference mean. With a Z-score of -0.11 (45.7th percentile), this represents normal volume . ",
  "text_data": "Age is 70.3 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, etc.), which are typically affected in Alzheimer’s. Cognitive scores (MMSE 30, MoCA 30) are intact, and there are no clinical signs of impairment. APOE4 carrier status increases risk but does not confirm disease.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (imaging shows mild atrophy, but cognition is preserved; APOE4 status warrants monitoring)",
  "timestamp": "2025-07-26T12:18:21.306957"
}