{
  "ptid_time": "009_S_4388_2013-02-13",
  "img_path": "/data/qiuhui/data/adni/images/009_S_4388/2013-02-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,105 mm³, 26.9% above the reference mean. With a Z-score of 0.64 (73.9th percentile), this represents normal volume ; hippocampal volume measures 8,383 mm³, 4.4% above the reference mean. With a Z-score of 0.44 (67.1th percentile), this represents normal volume ; whole brain volume measures 1,167,250 mm³, 2.9% above the reference mean. With a Z-score of 0.41 (65.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,219 mm³, 1.0% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume ; fusiform gyrus volume measures 19,001 mm³, 4.6% below the reference mean. With a Z-score of -0.38 (35.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,542 mm³, 5.0% above the reference mean. With a Z-score of 0.42 (66.1th percentile), this represents normal volume . ",
  "text_data": "Age is 67.8 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 15.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive testing (MMSE 30, MoCA 29) is intact, and while APOE4 homozygous status increases Alzheimer's risk, there is currently no evidence of cognitive or structural decline.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:20:37.931222"
}