{
  "ptid_time": "137_S_4632_2016-06-29",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4632/2016-06-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 50,138 mm³, 30.2% above the reference mean. With a Z-score of 0.72 (76.5th percentile), this represents normal volume ; hippocampal volume measures 7,806 mm³, 3.3% above the reference mean. With a Z-score of 0.32 (62.5th percentile), this represents normal volume ; whole brain volume measures 1,136,250 mm³, 5.3% above the reference mean. With a Z-score of 0.68 (75.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,394 mm³, 7.2% above the reference mean. With a Z-score of 0.49 (68.6th percentile), this represents normal volume ; fusiform gyrus volume measures 20,183 mm³, 7.1% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,699 mm³, 6.4% above the reference mean. With a Z-score of 0.57 (71.7th percentile), this represents normal volume . ",
  "text_data": "Age is 71.7 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges, with Z-scores and percentiles indicating no significant atrophy. Cognitive scores (MMSE 29, MoCA 27) are also within normal limits, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:40:37.216489"
}