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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.

This study of 500 patients found the prevalence of non-SSCD on high-resolution CT in asymptomatic individuals to be 1.6% for CFD and 8.0% for JVD as compared with the rate in patients with audiologic or vestibular symptoms (2.9% for CFD and 7.8% for JVD). There was no statistically significant difference in the rates of radiologic findings between patients with reported symptoms suggestive of a possible third window syndrome and those without auditory or vestibular symptoms.

This systematic review and meta-analysis found the incidence of new postprocedural DWI-detected ischemic lesions after endovascular treatment for intracranial aneurysms to be 47.0% (95% CI, 39.6%–55.8%), regardless of the endovascular procedure used. Studies have shown that almost half of these lesions are asymptomatic, and if small (<5 mm), these lesions have been shown to regress without negative effect on clinical outcome.

Multi-institutional retrospective evaluation of patients with CSF-to-venous fistulas treated with CT-guided fibrin glue treatment showed that treatment success may be in part driven by whether the spread of fibrin injectate matches the target drainage pathway of the CVF.