{
  "ptid_time": "129_S_1246_2012-04-23",
  "img_path": "/data/qiuhui/data/adni/images/129_S_1246/2012-04-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,773 mm³, 27.9% below the reference mean. With a Z-score of -0.67 (25.2th percentile), this represents normal volume ; hippocampal volume measures 7,800 mm³, 3.2% above the reference mean. With a Z-score of 0.31 (62.2th percentile), this represents normal volume ; whole brain volume measures 987,975 mm³, 8.5% below the reference mean. With a Z-score of -1.10 (13.6th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,575 mm³, 12.8% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,015 mm³, 4.4% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,153 mm³, 8.5% above the reference mean. With a Z-score of 0.76 (77.8th percentile), this represents normal volume . ",
  "text_data": "Age is 77.4 years. Gender is Male. Education: 14 years. MMSE: 28.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy (Z-score -1.10, 13.6th percentile), but other key regions (hippocampus, entorhinal cortex, fusiform gyrus) are within normal ranges. Cognitive scores (MMSE 28, MoCA 25) are borderline for MCI but still within normal limits for age. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline MoCA and mild whole-brain atrophy, but no significant regional atrophy or clear cognitive impairment)",
  "timestamp": "2025-07-26T14:11:28.507247"
}