{
  "ptid_time": "037_S_4750_2013-08-12",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4750/2013-08-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,644 mm³, 38.7% below the reference mean. With a Z-score of -1.05 (14.8th percentile), this represents mild atrophy; hippocampal volume measures 6,430 mm³, 1.0% below the reference mean. With a Z-score of -0.08 (46.8th percentile), this represents normal volume ; whole brain volume measures 984,278 mm³, 6.0% above the reference mean. With a Z-score of 0.73 (76.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,235 mm³, 22.3% above the reference mean. With a Z-score of 1.20 (88.6th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,875 mm³, 11.0% above the reference mean. With a Z-score of 0.82 (79.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,439 mm³, 14.4% below the reference mean. With a Z-score of -1.28 (10.1th percentile), this represents mild atrophy. ",
  "text_data": "Age is 84.7 years. Gender is Female. Education: 18 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the ventricular volume and middle temporal gyrus, but hippocampal volume is normal, and entorhinal cortex is mildly enlarged. Cognitive scores (MMSE 29, MoCA 25) are within normal limits for age, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions but preserved cognition and no genetic risk)",
  "timestamp": "2025-07-26T06:48:31.336862"
}