{
  "ptid_time": "007_S_4488_2018-09-14",
  "img_path": "/data/qiuhui/data/adni/images/007_S_4488/2018-09-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,311 mm³, 21.3% below the reference mean. With a Z-score of -0.51 (30.5th percentile), this represents normal volume ; hippocampal volume measures 8,118 mm³, 7.4% above the reference mean. With a Z-score of 0.72 (76.5th percentile), this represents normal volume ; whole brain volume measures 1,164,250 mm³, 7.9% above the reference mean. With a Z-score of 1.02 (84.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 5,202 mm³, 26.9% above the reference mean. With a Z-score of 1.82 (96.6th percentile), this represents moderate enlargement; fusiform gyrus volume measures 20,988 mm³, 11.4% above the reference mean. With a Z-score of 0.97 (83.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,333 mm³, 9.4% below the reference mean. With a Z-score of -0.85 (19.9th percentile), this represents normal volume . ",
  "text_data": "Age is 79.1 years. Gender is Male. Education: 18 years. MMSE: 27.0. MoCA: 27.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges or even above average (e.g., hippocampal, whole brain, entorhinal cortex), with no significant atrophy in key Alzheimer’s-related regions. Cognitive scores (MMSE, MoCA) are normal, and the absence of APOE4 further reduces Alzheimer’s risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:02:20.111520"
}