{
  "ptid_time": "130_S_0969_2006-10-18",
  "img_path": "/data/qiuhui/data/adni/images/130_S_0969/2006-10-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,189 mm³, 19.0% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume ; hippocampal volume measures 6,500 mm³, 14.0% below the reference mean. With a Z-score of -1.37 (8.6th percentile), this represents mild atrophy; whole brain volume measures 1,039,780 mm³, 3.7% below the reference mean. With a Z-score of -0.48 (31.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,207 mm³, 2.6% above the reference mean. With a Z-score of 0.18 (57.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,557 mm³, 6.8% below the reference mean. With a Z-score of -0.58 (28.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,361 mm³, 4.6% below the reference mean. With a Z-score of -0.41 (34.0th percentile), this represents normal volume . ",
  "text_data": "Age is 70.0 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. Medical history: Psychiatric; Neurologic; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Allergies or Drug Sensitivities; Smoking; Malignancy; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.37, 8.6th percentile), which is a key biomarker for Alzheimer's disease, but all other brain volumes are within normal ranges. The MMSE score of 29 is normal, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **MCI (Mild Cognitive Impairment)**  \n**Confidence:** **Medium** (due to isolated hippocampal atrophy but otherwise normal cognitive and biomarker profile)",
  "timestamp": "2025-07-26T14:33:00.467766"
}