{
  "ptid_time": "027_S_5118_2015-05-20",
  "img_path": "/data/qiuhui/data/adni/images/027_S_5118/2015-05-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,208 mm³, 14.8% above the reference mean. With a Z-score of 0.34 (63.2th percentile), this represents normal volume ; hippocampal volume measures 8,062 mm³, 13.3% above the reference mean. With a Z-score of 1.22 (88.9th percentile), this represents mild enlargement; whole brain volume measures 982,706 mm³, 0.8% above the reference mean. With a Z-score of 0.10 (54.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,634 mm³, 1.1% below the reference mean. With a Z-score of -0.07 (47.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,111 mm³, 6.5% above the reference mean. With a Z-score of 0.59 (72.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,668 mm³, 2.6% above the reference mean. With a Z-score of 0.23 (58.9th percentile), this represents normal volume . ",
  "text_data": "Age is 70.2 years. Gender is Female. Education: 20 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.03 SUVR (normal ). ",
  "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 or entorhinal cortex. Cognitive scores (MMSE 30, MoCA 27) are normal, and amyloid PET (AV45) is negative, suggesting no underlying Alzheimer's pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T04:09:26.019569"
}