{
  "ptid_time": "136_S_0579_2008-08-18",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0579/2008-08-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,282 mm³, 22.1% above the reference mean. With a Z-score of 0.55 (71.0th percentile), this represents normal volume ; hippocampal volume measures 7,102 mm³, 7.6% below the reference mean. With a Z-score of -0.85 (19.7th percentile), this represents normal volume ; whole brain volume measures 1,094,620 mm³, 6.4% above the reference mean. With a Z-score of 0.79 (78.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,503 mm³, 15.7% above the reference mean. With a Z-score of 1.21 (88.8th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,265 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,770 mm³, 15.8% above the reference mean. With a Z-score of 1.41 (92.0th percentile), this represents mild enlargement. ",
  "text_data": "Age is 67.4 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (hippocampal volume slightly below mean but still normal, entorhinal cortex and middle temporal gyrus mildly enlarged). The MMSE score of 30 is intact, and while APOE4 is a risk factor, there are no clear structural or cognitive deficits suggestive of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:03:01.132163"
}