{
  "ptid_time": "116_S_1232_2009-02-05",
  "img_path": "/data/qiuhui/data/adni/images/116_S_1232/2009-02-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,666 mm³, 47.7% below the reference mean. With a Z-score of -1.09 (13.7th percentile), this represents mild atrophy; hippocampal volume measures 7,315 mm³, 2.8% above the reference mean. With a Z-score of 0.26 (60.2th percentile), this represents normal volume ; whole brain volume measures 967,438 mm³, 0.7% below the reference mean. With a Z-score of -0.09 (46.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,563 mm³, 3.0% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; fusiform gyrus volume measures 17,075 mm³, 0.4% above the reference mean. With a Z-score of 0.03 (51.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,408 mm³, 4.0% below the reference mean. With a Z-score of -0.34 (36.5th percentile), this represents normal volume . ",
  "text_data": "Age is 74.1 years. Gender is Female. Education: 14 years. MMSE: 30.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:00:28.243196"
}