{
  "ptid_time": "941_S_4365_2012-12-20",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4365/2012-12-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,395 mm³, 13.6% above the reference mean. With a Z-score of 0.39 (65.3th percentile), this represents normal volume ; hippocampal volume measures 7,422 mm³, 6.5% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume ; whole brain volume measures 1,120,770 mm³, 8.9% above the reference mean. With a Z-score of 1.17 (87.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,265 mm³, 7.5% above the reference mean. With a Z-score of 0.49 (68.7th percentile), this represents normal volume ; fusiform gyrus volume measures 20,085 mm³, 11.2% above the reference mean. With a Z-score of 0.97 (83.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,941 mm³, 3.8% above the reference mean. With a Z-score of 0.34 (63.4th percentile), this represents normal volume . ",
  "text_data": "Age is 81.3 years. Gender is Male. Education: 20 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. Cognitive scores (MMSE 27, MoCA 25) are within normal limits for age, and APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T17:38:18.084646"
}