{
  "ptid_time": "002_S_6652_2020-02-13",
  "img_path": "/data/qiuhui/data/adni/images/002_S_6652/2020-02-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,281 mm³, 18.1% below the reference mean. With a Z-score of -0.49 (31.3th percentile), this represents normal volume ; hippocampal volume measures 6,798 mm³, 4.7% above the reference mean. With a Z-score of 0.37 (64.6th percentile), this represents normal volume ; whole brain volume measures 896,852 mm³, 3.4% below the reference mean. With a Z-score of -0.41 (34.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,336 mm³, 3.7% below the reference mean. With a Z-score of -0.20 (42.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,421 mm³, 14.3% above the reference mean. With a Z-score of 1.08 (86.0th percentile), this represents mild enlargement; middle temporal gyrus volume measures 18,520 mm³, 2.7% above the reference mean. With a Z-score of 0.24 (59.6th percentile), this represents normal volume . ",
  "text_data": "Age is 87.4 years. Gender is Female. Education: 20 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) are within normal ranges, with only the fusiform gyrus showing mild enlargement. Cognitive scores (MMSE 30, MoCA 27) are intact, and there is no APOE4 risk allele. No structural or clinical evidence of neurodegeneration is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:37:21.756262"
}