{
  "ptid_time": "053_S_0919_2010-11-03",
  "img_path": "/data/qiuhui/data/adni/images/053_S_0919/2010-11-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,414 mm³, 14.6% above the reference mean. With a Z-score of 0.35 (63.6th percentile), this represents normal volume ; hippocampal volume measures 8,144 mm³, 1.5% above the reference mean. With a Z-score of 0.15 (55.8th percentile), this represents normal volume ; whole brain volume measures 1,122,170 mm³, 1.1% below the reference mean. With a Z-score of -0.15 (43.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,050 mm³, 5.0% below the reference mean. With a Z-score of -0.35 (36.5th percentile), this represents normal volume ; fusiform gyrus volume measures 16,654 mm³, 16.3% below the reference mean. With a Z-score of -1.36 (8.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,533 mm³, 3.9% below the reference mean. With a Z-score of -0.32 (37.3th percentile), this represents normal volume . ",
  "text_data": "Age is 66.4 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 10.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with the exception of mild atrophy in the fusiform gyrus (Z-score -1.36, 8.7th percentile). However, hippocampal and entorhinal cortex volumes—key regions in Alzheimer's—are within normal ranges. The MMSE score of 30 is intact, and there are no reported cognitive complaints.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to isolated fusiform gyrus atrophy, but no other supporting clinical or biomarker evidence of impairment)",
  "timestamp": "2025-07-26T07:56:20.201602"
}