{
  "ptid_time": "003_S_6268_2019-08-06",
  "img_path": "/data/qiuhui/data/adni/images/003_S_6268/2019-08-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,975 mm³, 22.0% above the reference mean. With a Z-score of 0.53 (70.1th percentile), this represents normal volume ; hippocampal volume measures 7,932 mm³, 4.9% above the reference mean. With a Z-score of 0.48 (68.5th percentile), this represents normal volume ; whole brain volume measures 1,262,060 mm³, 16.9% above the reference mean. With a Z-score of 2.20 (98.6th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,992 mm³, 2.6% below the reference mean. With a Z-score of -0.18 (42.9th percentile), this represents normal volume ; fusiform gyrus volume measures 18,398 mm³, 2.3% below the reference mean. With a Z-score of -0.20 (42.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,484 mm³, 5.4% above the reference mean. With a Z-score of 0.48 (68.5th percentile), this represents normal volume . ",
  "text_data": "Age is 70.6 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 12.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges, with no significant atrophy. Ventricular volume is normal, and whole brain volume is significantly above average. Cognitive scores (MMSE 30, MoCA 29) are intact, and while APOE4 homozygosity is a risk factor, there is currently no clinical or structural evidence of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:01:12.869375"
}