{
  "ptid_time": "109_S_1013_2007-06-20",
  "img_path": "/data/qiuhui/data/adni/images/109_S_1013/2007-06-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,785 mm³, 3.3% above the reference mean. With a Z-score of 0.08 (53.1th percentile), this represents normal volume ; hippocampal volume measures 7,143 mm³, 5.5% below the reference mean. With a Z-score of -0.54 (29.6th percentile), this represents normal volume ; whole brain volume measures 917,902 mm³, 15.0% below the reference mean. With a Z-score of -1.94 (2.6th percentile), this represents moderate atrophy; entorhinal cortex volume measures 4,086 mm³, 0.4% below the reference mean. With a Z-score of -0.02 (49.0th percentile), this represents normal volume ; fusiform gyrus volume measures 13,778 mm³, 26.9% below the reference mean. With a Z-score of -2.29 (1.1th percentile), this represents significant atrophy; middle temporal gyrus volume measures 19,356 mm³, 9.3% below the reference mean. With a Z-score of -0.84 (20.2th percentile), this represents normal volume . ",
  "text_data": "Age is 78.3 years. Gender is Male. Education: 20 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows moderate whole brain atrophy and significant fusiform gyrus atrophy, while hippocampal and other regional volumes are within normal ranges. The MMSE score of 28 is normal, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Structural atrophy in some regions raises concern, but preserved cognitive function and lack of APOE4 suggest no current impairment.)",
  "timestamp": "2025-07-26T11:29:09.491183"
}