Functional brain imaging with I123-amphetamine. First experience in the Netherlands

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Single Photon Emission Computed Tomography (SPECT) is increasingly utilized for cerebral blood flow imaging, particularly in cases of cerebral infarction.
• This study presents the initial experiences with SPECT in the Netherlands for evaluating cerebral blood flow.

Observation:

• SPECT identified larger lesions than CT in 57.6% of patients, including those with cerebral infarction and hematoma.
• In 33.3% of cases, SPECT and CT lesion sizes were comparable.
• Crossed cerebellar diaschisis, characterized by decreased perfusion in the contralateral cerebellar hemisphere, was observed in 10 out of 14 patients with solitary hemispheric lesions.

Findings:

• SPECT demonstrates superior sensitivity in detecting lesion size compared to CT in a significant portion of neurological cases.
• The phenomenon of crossed cerebellar diaschisis is frequently associated with unilateral hemispheric lesions.
• A unique flow pattern was noted in a patient with suspected Alzheimer's disease.

Implications:

• SPECT offers valuable insights into cerebral hemodynamics and lesion characterization, potentially improving diagnostic accuracy.
• Understanding crossed cerebellar diaschisis can enhance the interpretation of SPECT findings in stroke and other focal brain injuries.
• Further research into specific SPECT flow patterns may aid in the early diagnosis and understanding of neurodegenerative diseases like Alzheimer's.