{
  "ptid_time": "133_S_0493_2006-05-31",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0493/2006-05-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 56,522 mm³, 46.7% above the reference mean. With a Z-score of 1.12 (86.9th percentile), this represents mild enlargement; hippocampal volume measures 8,540 mm³, 13.0% above the reference mean. With a Z-score of 1.27 (89.7th percentile), this represents mild enlargement; whole brain volume measures 1,133,330 mm³, 5.0% above the reference mean. With a Z-score of 0.65 (74.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,167 mm³, 1.6% above the reference mean. With a Z-score of 0.11 (54.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,064 mm³, 4.1% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,344 mm³, 4.7% above the reference mean. With a Z-score of 0.42 (66.4th percentile), this represents normal volume . ",
  "text_data": "Age is 77.5 years. Gender is Male. Education: 20 years. Handedness: Right. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Dermatologic-Connective Tissue; Musculoskeletal; Endocrine-Metabolic; Renal-Genitourinary; Smoking; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild ventricular enlargement but otherwise normal or above-average volumes in key regions (hippocampus, whole brain, entorhinal cortex, middle temporal gyrus). The fusiform gyrus is slightly below average but still within the normal range. The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles reduces genetic risk for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:**",
  "timestamp": "2025-07-26T15:19:08.161952"
}