{
  "ptid_time": "109_S_0777_2006-09-07",
  "img_path": "/data/qiuhui/data/adni/images/109_S_0777/2006-09-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,256 mm³, 13.6% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume ; hippocampal volume measures 5,942 mm³, 16.5% below the reference mean. With a Z-score of -1.51 (6.5th percentile), this represents moderate atrophy; whole brain volume measures 1,008,440 mm³, 3.5% above the reference mean. With a Z-score of 0.44 (66.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,149 mm³, 14.3% below the reference mean. With a Z-score of -0.88 (19.1th percentile), this represents normal volume ; fusiform gyrus volume measures 14,357 mm³, 15.6% below the reference mean. With a Z-score of -1.42 (7.8th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,467 mm³, 8.9% below the reference mean. With a Z-score of -0.77 (22.0th percentile), this represents normal volume . ",
  "text_data": "Age is 75.1 years. Gender is Female. Education: 7 years. Handedness: Right. Race: Black or African American. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Major Surgical Procedures. MMSE: 22.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows moderate atrophy (Z-score -1.51, 6.5th percentile), and the fusiform gyrus shows mild atrophy (Z-score -1.42, 7.8th percentile), both of which are associated with Alzheimer's pathology. The MMSE score of 22 suggests cognitive impairment, but the absence of APOE4 reduces genetic risk.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to hippocampal and fusiform atrophy but no APOE4 and only moderate cognitive decline)",
  "timestamp": "2025-07-26T11:27:40.919444"
}