{
  "ptid_time": "126_S_5243_2018-08-23",
  "img_path": "/data/qiuhui/data/adni/images/126_S_5243/2018-08-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,753 mm³, 25.4% below the reference mean. With a Z-score of -0.61 (27.2th percentile), this represents normal volume ; hippocampal volume measures 8,629 mm³, 14.2% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; whole brain volume measures 1,020,150 mm³, 5.5% below the reference mean. With a Z-score of -0.71 (23.8th percentile), this represents normal volume ; entorhinal cortex volume measures 5,296 mm³, 29.2% above the reference mean. With a Z-score of 1.98 (97.6th percentile), this represents moderate enlargement; fusiform gyrus volume measures 18,741 mm³, 0.5% below the reference mean. With a Z-score of -0.04 (48.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,647 mm³, 3.2% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume . ",
  "text_data": "Age is 76.0 years. Gender is Male. Education: 12 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or even enlarged hippocampal and entorhinal cortex volumes, which are typically reduced in Alzheimer's disease. Cognitive scores (MMSE 29, MoCA 27) are within normal ranges, and amyloid PET (AV45) is normal, ruling out significant amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:53:27.196089"
}