{
  "ptid_time": "002_S_0413_2008-07-31",
  "img_path": "/data/qiuhui/data/adni/images/002_S_0413/2008-07-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,975 mm³, 13.9% above the reference mean. With a Z-score of 0.32 (62.5th percentile), this represents normal volume ; hippocampal volume measures 6,719 mm³, 5.6% below the reference mean. With a Z-score of -0.51 (30.5th percentile), this represents normal volume ; whole brain volume measures 1,045,590 mm³, 7.3% above the reference mean. With a Z-score of 0.92 (82.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,891 mm³, 5.9% above the reference mean. With a Z-score of 0.36 (64.2th percentile), this represents normal volume ; fusiform gyrus volume measures 20,303 mm³, 19.3% above the reference mean. With a Z-score of 1.76 (96.1th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 19,953 mm³, 4.1% above the reference mean. With a Z-score of 0.35 (63.9th percentile), this represents normal volume . ",
  "text_data": "Age is 78.3 years. Gender is Female. Education: 16 years. MMSE: 30.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles, with only the fusiform gyrus showing moderate enlargement (likely not clinically significant). The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:01:08.915848"
}