{
  "ptid_time": "052_S_1251_2007-02-09",
  "img_path": "/data/qiuhui/data/adni/images/052_S_1251/2007-02-09/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 measures are largely within normal ranges, with no significant atrophy in key regions like the hippocampus, entorhinal cortex, or middle temporal gyrus. The MMSE score of 28 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": "2025-07-26T07:45:15.889289"
}