{
  "ptid_time": "131_S_1301_2007-02-21",
  "img_path": "/data/qiuhui/data/adni/images/131_S_1301/2007-02-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,133 mm³, 0.2% above the reference mean. With a Z-score of 0.01 (50.2th percentile), this represents normal volume ; hippocampal volume measures 8,559 mm³, 20.3% above the reference mean. With a Z-score of 1.86 (96.9th percentile), this represents moderate enlargement; whole brain volume measures 1,092,270 mm³, 12.1% above the reference mean. With a Z-score of 1.52 (93.6th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,650 mm³, 0.6% below the reference mean. With a Z-score of -0.04 (48.5th percentile), this represents normal volume ; fusiform gyrus volume measures 14,321 mm³, 15.8% below the reference mean. With a Z-score of -1.44 (7.5th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,105 mm³, 0.3% below the reference mean. With a Z-score of -0.03 (48.8th percentile), this represents normal volume . ",
  "text_data": "Age is 72.1 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. Medical history: Neurologic; Head, Eyes, Ears, Nose and Throat; Musculoskeletal; Hematopoietic-Lymphatic. MMSE: 30.0. Logical Memory: 21.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and whole brain volumes are moderately enlarged, which is atypical for Alzheimer's but may suggest compensatory mechanisms or a non-degenerative process. The fusiform gyrus shows mild atrophy, but other key regions (entorhinal cortex, middle temporal gyrus) are normal. The MMSE score of 30 is intact, and there are no clear cognitive deficits reported.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to the unusual enlargement in some regions but lack of clinical impairment)",
  "timestamp": "2025-07-26T15:09:59.077591"
}