{
  "ptid_time": "009_S_0842_2007-10-10",
  "img_path": "/data/qiuhui/data/adni/images/009_S_0842/2007-10-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,805 mm³, 1.8% below the reference mean. With a Z-score of -0.04 (48.2th percentile), this represents normal volume ; hippocampal volume measures 7,889 mm³, 4.4% above the reference mean. With a Z-score of 0.43 (66.5th percentile), this represents normal volume ; whole brain volume measures 1,139,930 mm³, 5.6% above the reference mean. With a Z-score of 0.73 (76.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,889 mm³, 5.2% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; fusiform gyrus volume measures 18,354 mm³, 2.6% below the reference mean. With a Z-score of -0.22 (41.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,110 mm³, 17.7% above the reference mean. With a Z-score of 1.59 (94.4th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 74.6 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges, with the middle temporal gyrus showing moderate enlargement but no atrophy. The MMSE score of 30/30 indicates no cognitive impairment, and APOE4 status (heterozygous) does not override the absence of structural or functional deficits.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:12:24.908276"
}