Because of the different attenuations of tissues at
different energy levels, dual-energy CT offers tissue differentiation
and characterization, reduction of artifacts, and remodeling
of contrast-to-noise ratio (CNR) and signal-to-noise
ratio (SNR), hereby creating newopportunities and insights in
CT imaging. The applications for dual-energy imaging in
neuroradiology are various and still expanding. Automated
bone removal is used in CT angiography and CT venography
of the intracranial vessels.Monoenergetic reconstructions can
be used in patients with or withoutmetal implants in the brain
and spine to reduce artifacts, improve CNR and SNR, or to
improve iodine conspicuity. Differentiation of iodine and
hemorrhage is used in high-density lesions, after intra-arterial
recanalization in stroke patients or after administration of
contrast media. Detection of underlying (vascular and nonvascular)
pathology and spot sign can be used in patients
presenting with (acute) intracranial hemorrhage.
Because of the different attenuations of tissues atdifferent energy levels, dual-energy CT offers tissue differentiationand characterization, reduction of artifacts, and remodelingof contrast-to-noise ratio (CNR) and signal-to-noiseratio (SNR), hereby creating newopportunities and insights inCT imaging. The applications for dual-energy imaging inneuroradiology are various and still expanding. Automatedbone removal is used in CT angiography and CT venographyof the intracranial vessels.Monoenergetic reconstructions canbe used in patients with or withoutmetal implants in the brainand spine to reduce artifacts, improve CNR and SNR, or toimprove iodine conspicuity. Differentiation of iodine andhemorrhage is used in high-density lesions, after intra-arterialrecanalization in stroke patients or after administration ofcontrast media. Detection of underlying (vascular and nonvascular)pathology and spot sign can be used in patientspresenting with (acute) intracranial hemorrhage.
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