{
  "ptid_time": "941_S_1197_2007-01-20",
  "img_path": "/data/qiuhui/data/adni/images/941_S_1197/2007-01-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,364 mm³, 15.2% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume ; hippocampal volume measures 6,410 mm³, 1.3% below the reference mean. With a Z-score of -0.10 (45.8th percentile), this represents normal volume ; whole brain volume measures 887,612 mm³, 4.4% below the reference mean. With a Z-score of -0.52 (30.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,903 mm³, 12.7% above the reference mean. With a Z-score of 0.69 (75.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,777 mm³, 10.3% above the reference mean. With a Z-score of 0.78 (78.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,523 mm³, 13.9% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy. ",
  "text_data": "Age is 82.4 years. Gender is Female. Education: 20 years. Handedness: Left. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Musculoskeletal; Smoking; Major Surgical Procedures. MMSE: 30.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges except for mild atrophy in the middle temporal gyrus. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (Mild atrophy in the middle temporal gyrus could be age-related, but cognitive performance remains intact.)",
  "timestamp": "2025-07-26T17:27:40.293295"
}