{
  "ptid_time": "109_S_4380_2016-02-10",
  "img_path": "/data/qiuhui/data/adni/images/109_S_4380/2016-02-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,788 mm³, 0.7% above the reference mean. With a Z-score of 0.02 (50.7th percentile), this represents normal volume ; hippocampal volume measures 8,223 mm³, 8.8% above the reference mean. With a Z-score of 0.86 (80.4th percentile), this represents normal volume ; whole brain volume measures 1,088,070 mm³, 0.8% above the reference mean. With a Z-score of 0.10 (54.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,735 mm³, 15.5% above the reference mean. With a Z-score of 1.05 (85.3th percentile), this represents mild enlargement; fusiform gyrus volume measures 21,805 mm³, 15.7% above the reference mean. With a Z-score of 1.34 (91.0th percentile), this represents mild enlargement; middle temporal gyrus volume measures 20,623 mm³, 3.4% below the reference mean. With a Z-score of -0.30 (38.1th percentile), this represents normal volume . ",
  "text_data": "Age is 75.8 years. Gender is Male. Education: 17 years. MMSE: 30.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.94 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. The MMSE score of 30 is optimal, and the absence of APOE4 further reduces Alzheimer's risk. The mild reduction in AV45 (amyloid PET) does not strongly support amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:33:12.648800"
}