{
  "ptid_time": "137_S_0973_2007-05-22",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0973/2007-05-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 54,156 mm³, 40.6% above the reference mean. With a Z-score of 0.97 (83.5th percentile), this represents normal volume ; hippocampal volume measures 7,288 mm³, 3.6% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; whole brain volume measures 1,051,770 mm³, 2.6% below the reference mean. With a Z-score of -0.33 (37.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,506 mm³, 14.5% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume ; fusiform gyrus volume measures 20,120 mm³, 6.8% above the reference mean. With a Z-score of 0.58 (71.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,711 mm³, 2.9% below the reference mean. With a Z-score of -0.26 (39.6th percentile), this represents normal volume . ",
  "text_data": "Age is 77.3 years. Gender is Male. Education: 20 years. MMSE: 25.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (e.g., entorhinal cortex is 14.5% below the mean but still within normal Z-score limits). The MMSE score of 25 is borderline but not definitively indicative of cognitive impairment. The absence of APOE4 reduces genetic risk for Alzheimer’s.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline MMSE and mild entorhinal cortex reduction, but overall normal imaging and no strong risk factors)",
  "timestamp": "2025-07-26T16:21:38.751180"
}