{
  "ptid_time": "021_S_0337_2006-03-28",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0337/2006-03-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 96,682 mm³, 151.0% above the reference mean. With a Z-score of 3.62 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 7,506 mm³, 0.7% below the reference mean. With a Z-score of -0.07 (47.3th percentile), this represents normal volume ; whole brain volume measures 1,060,960 mm³, 1.7% below the reference mean. With a Z-score of -0.22 (41.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,464 mm³, 8.9% above the reference mean. With a Z-score of 0.60 (72.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,671 mm³, 6.2% below the reference mean. With a Z-score of -0.53 (29.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,773 mm³, 6.7% above the reference mean. With a Z-score of 0.60 (72.7th percentile), this represents normal volume . ",
  "text_data": "Age is 75.8 years. Gender is Male. Education: 20 years. Handedness: Left. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Dermatologic-Connective Tissue; Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities. MMSE: 30.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound ventricular enlargement (Z-score 3.62), which is a strong indicator of neurodegeneration, but hippocampal and whole brain volumes are within normal ranges. The MMSE score of 30 is intact, and there are no other significant volumetric deficits in key AD-related regions.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Ventricular enlargement suggests possible early neurodegenerative changes, but cognitive performance and other structural measures remain normal.)",
  "timestamp": "2025-07-26T01:26:29.863439"
}