{
  "ptid_time": "036_S_6189_2018-01-29",
  "img_path": "/data/qiuhui/data/adni/images/036_S_6189/2018-01-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,132 mm³, 41.2% below the reference mean. With a Z-score of -1.03 (15.1th percentile), this represents mild atrophy; hippocampal volume measures 7,758 mm³, 1.0% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; whole brain volume measures 1,090,270 mm³, 5.9% above the reference mean. With a Z-score of 0.74 (77.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,796 mm³, 2.5% below the reference mean. With a Z-score of -0.19 (42.3th percentile), this represents normal volume ; fusiform gyrus volume measures 18,794 mm³, 3.2% above the reference mean. With a Z-score of 0.36 (64.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,340 mm³, 8.9% above the reference mean. With a Z-score of 0.79 (78.5th percentile), this represents normal volume . ",
  "text_data": "Age is 69.5 years. Gender is Female. Education: 15 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 24.0. Logical Memory: 5.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive testing reveals a perfect MMSE (30/30) but a borderline MoCA (24/30), which could suggest subtle cognitive changes. However, the absence of significant atrophy or biomarker abnormalities (APOE4-negative, normal AV45) argues against dementia.  \n\n**Diagnosis:** **MCI (Mild Cognitive Impairment)**  \n**Confidence:** **Medium** (MoCA is concerning, but imaging and biomarkers are largely normal; clinical correlation is needed to rule out non-neurodegenerative causes of low MoCA, such as mood or sleep disorders).",
  "timestamp": "2025-07-26T06:22:37.095174"
}