{
  "ptid_time": "027_S_5118_2014-04-22",
  "img_path": "/data/qiuhui/data/adni/images/027_S_5118/2014-04-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,499 mm³, 41.0% above the reference mean. With a Z-score of 1.03 (84.8th percentile), this represents mild enlargement; hippocampal volume measures 7,954 mm³, 3.5% above the reference mean. With a Z-score of 0.39 (65.3th percentile), this represents normal volume ; whole brain volume measures 990,334 mm³, 3.8% below the reference mean. With a Z-score of -0.47 (31.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,972 mm³, 2.0% above the reference mean. With a Z-score of 0.16 (56.3th percentile), this represents normal volume ; fusiform gyrus volume measures 18,183 mm³, 0.1% below the reference mean. With a Z-score of -0.02 (49.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,533 mm³, 0.1% above the reference mean. With a Z-score of 0.01 (50.2th percentile), this represents normal volume . ",
  "text_data": "Age is 69.2 years. Gender is Female. Education: 20 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE, MoCA) are intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T04:09:21.112564"
}