{
  "ptid_time": "014_S_4576_2018-11-12",
  "img_path": "/data/qiuhui/data/adni/images/014_S_4576/2018-11-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,032 mm³, 25.1% below the reference mean. With a Z-score of -0.57 (28.3th percentile), this represents normal volume ; hippocampal volume measures 7,109 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.7th percentile), this represents normal volume ; whole brain volume measures 876,649 mm³, 10.1% below the reference mean. With a Z-score of -1.27 (10.3th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,717 mm³, 1.2% above the reference mean. With a Z-score of 0.07 (52.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,999 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,897 mm³, 1.4% below the reference mean. With a Z-score of -0.12 (45.1th percentile), this represents normal volume . ",
  "text_data": "Age is 77.0 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 25.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy (10.1% below reference mean, Z-score -1.27), but all other regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive testing (MMSE 30, MoCA 25) is borderline for MCI but not strongly indicative of dementia. No APOE4 risk allele is present.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Mild whole-brain atrophy could suggest early changes, but cognitive scores and regional volumes do not yet support MCI or dementia.)",
  "timestamp": "2025-07-25T23:56:21.242652"
}