{
  "ptid_time": "094_S_0526_2006-05-16",
  "img_path": "/data/qiuhui/data/adni/images/094_S_0526/2006-05-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,140 mm³, 48.2% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; hippocampal volume measures 6,222 mm³, 4.2% below the reference mean. With a Z-score of -0.34 (36.8th percentile), this represents normal volume ; whole brain volume measures 841,148 mm³, 9.4% below the reference mean. With a Z-score of -1.13 (13.0th percentile), this represents mild atrophy; entorhinal cortex volume measures 2,699 mm³, 22.1% below the reference mean. With a Z-score of -1.19 (11.7th percentile), this represents mild atrophy; fusiform gyrus volume measures 11,541 mm³, 28.4% below the reference mean. With a Z-score of -2.13 (1.7th percentile), this represents significant atrophy; middle temporal gyrus volume measures 15,041 mm³, 16.6% below the reference mean. With a Z-score of -1.47 (7.0th percentile), this represents mild atrophy. ",
  "text_data": "Age is 85.1 years. Gender is Female. Education: 7 years. Handedness: Right. Race: Black or African American. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Endocrine-Metabolic. MMSE: 26.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild to significant atrophy in multiple brain regions, including the fusiform gyrus (severe atrophy), entorhinal cortex, and middle temporal gyrus, which are commonly affected in Alzheimer's disease. However, hippocampal volume is normal, and the MMSE score of 26 is borderline (mild cognitive impairment range). The absence of APOE4 reduces genetic risk but does not rule out neurodegeneration.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to mixed findings—some atrophy but preserved hippocampus and borderline MMSE)",
  "timestamp": "2025-07-26T10:11:51.054352"
}