{
  "ptid_time": "052_S_1251_2007-03-09",
  "img_path": "/data/qiuhui/data/adni/images/052_S_1251/2007-03-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,430 mm³, 34.3% below the reference mean. With a Z-score of -0.79 (21.6th percentile), this represents normal volume ; hippocampal volume measures 7,922 mm³, 11.3% above the reference mean. With a Z-score of 1.04 (85.1th percentile), this represents mild enlargement; whole brain volume measures 1,010,260 mm³, 3.7% above the reference mean. With a Z-score of 0.46 (67.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,955 mm³, 7.7% above the reference mean. With a Z-score of 0.47 (68.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,851 mm³, 1.0% below the reference mean. With a Z-score of -0.09 (46.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,982 mm³, 4.2% above the reference mean. With a Z-score of 0.37 (64.4th percentile), this represents normal volume . ",
  "text_data": "Age is 74.2 years. Gender is Female. Education: 13 years. Handedness: Right. Race: White. Medical history: Psychiatric; Neurologic; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 28.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with no significant atrophy in key regions like the hippocampus, entorhinal cortex, or temporal structures. The MMSE score of 28/30 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:45:21.404278"
}