- CTA and CTP for Detecting Distal Medium Vessel Occlusions: A Systematic Review and Meta-analysis
This systematic review and meta-analysis aimed to compare the diagnostic test accuracy for CTA and CTP in the detection of distal medium vessel occlusion. The study found consistent evidence for a higher sensitivity in detecting distal medium vessel occlusion, particularly in arteries beyond the M2 segment of MCA, with multiphase CTA or CTP compared with single-phase CTA.
- Temporal Characteristics of CSF-Venous Fistulas on Dynamic Decubitus CT Myelography: A Retrospective Multi-Institution Cohort Study
This retrospective multi-institution cohort study analyzed the temporal features of CSF-venous fistula (CVF) visualization on dynamic decubitus CT myelography (dCTM) in 48 patients. The results showed that most CVFs were visible on first or subsequent phases of dCTM, but approximately 1 in 8 were only visible on either the early or delayed phase. The authors conclude that acquiring greater than 1 phase of imaging increases the sensitivity of dCTM by increasing its temporal resolution.
- Monoclonal Antibodies: What the Diagnostic Neuroradiologist Needs to Know
The therapeutic use of monoclonal antibodies is rapidly expanding for a variety of diseases. This review article describes commonly used monoclonal antibody-targeted therapeutic agents, their mechanism of action, clinical applications, and major adverse events with a focus on neurologic and neuroimaging manifestations. For example, immunostimulating anticancer mAbs can lead to proinflammatory conditions, while immunosuppressive medications can lead to activation of underlying opportunistic infections. Amyloid-segregating mAbs can lead to amyloid-related imaging abnormalities, and TNF-inhibiting mAbs have a higher incidence of demyelinating abnormalities.
- T1-Weighted, Dynamic Contrast-Enhanced MR Perfusion Imaging Can Differentiate between Treatment Success and Failure in Spine Metastases Undergoing Radiation Therapy
Routine MRI techniques are rather limited in assessing treatment response versus disease progression following radiation therapy as lesion size often fluctuates after both successful and unsuccessful treatment. In this study, dynamic contrast-enhanced MRI perfusion parameters were used to predict treatment success or failure regarding spinal osseous metastases and to show the concordance with lesion-size measurements in the determination of treatment success or failure. The authors found there were significant differences in the change in plasma volume following radiation treatment between their clinical response and persistent disease groups. Additionally, they demonstrated that plasma volume had a higher specificity than size measurements.
- Prevalence and Characteristics of Intracranial Aneurysms in Hereditary Hemorrhagic Telangiectasia
In this retrospective study, the authors evaluated the prevalence and characteristics of intracranial aneurysms in patients with hereditary hemorrhagic telangiectasia with brain vascular malformations. In their study cohort of 180 patients with HHT and brain vascular malformations, the authors demonstrated that the prevalence of intracranial aneurysm in hereditary hemorrhagic telangiectasia is comparable with that in the general population without clear association with shunting brain vascular malformations.
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