{
  "ptid_time": "011_S_0021_2005-10-10",
  "img_path": "/data/qiuhui/data/adni/images/011_S_0021/2005-10-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,987 mm³, 50.2% below the reference mean. With a Z-score of -1.15 (12.5th percentile), this represents mild atrophy; hippocampal volume measures 8,147 mm³, 14.5% above the reference mean. With a Z-score of 1.33 (90.8th percentile), this represents mild enlargement; whole brain volume measures 984,357 mm³, 1.0% above the reference mean. With a Z-score of 0.13 (55.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,428 mm³, 6.7% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,033 mm³, 6.0% above the reference mean. With a Z-score of 0.55 (70.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,689 mm³, 7.7% below the reference mean. With a Z-score of -0.67 (25.1th percentile), this represents normal volume . ",
  "text_data": "Age is 72.6 years. Gender is Female. Education: 18 years. Handedness: Right. Race: Black or African American. Medical history: Neurologic; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Dermatologic-Connective Tissue; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Major Surgical Procedures. MMSE: 30.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular enlargement (suggesting mild atrophy) but otherwise largely normal or even slightly above-average volumes in key regions like the hippocampus and whole brain. The MMSE score of 30 is intact, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy is seen in Alzheimer’s-vulnerable regions (e.g., entorhinal cortex, middle temporal gyrus).  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:39:24.884045"
}