{
  "ptid_time": "109_S_4499_2013-03-19",
  "img_path": "/data/qiuhui/data/adni/images/109_S_4499/2013-03-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,131 mm³, 33.8% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume ; hippocampal volume measures 7,573 mm³, 8.7% above the reference mean. With a Z-score of 0.75 (77.3th percentile), this represents normal volume ; whole brain volume measures 1,096,470 mm³, 6.5% above the reference mean. With a Z-score of 0.86 (80.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,144 mm³, 4.4% above the reference mean. With a Z-score of 0.29 (61.4th percentile), this represents normal volume ; fusiform gyrus volume measures 23,401 mm³, 29.5% above the reference mean. With a Z-score of 2.56 (99.5th percentile), this represents significant enlargement; middle temporal gyrus volume measures 23,991 mm³, 18.9% above the reference mean. With a Z-score of 1.70 (95.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 84.8 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex) are within normal ranges or even above average, with no significant atrophy. Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 genetic risk factor. The enlarged fusiform gyrus and middle temporal gyrus are atypical but not indicative of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:34:26.271320"
}