AJR. American journal of roentgenology
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AJR Am J Roentgenol · Sep 2016
Surrogate Imaging Biomarkers of Response of Colorectal Liver Metastases After Salvage Radioembolization Using 90Y-Loaded Resin Microspheres.
The purpose of the present study is to evaluate Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, tumor attenuation criteria, Choi criteria, and European Organization for Research and Treatment of Cancer (EORTC) PET criteria as measures of response and subsequent predictors of liver progression-free survival (PFS) after radioembolization (RE) of colorectal liver metastases (CLM). The study also assesses interobserver variability for measuring tumor attenuation using a single 2D ROI on a simple PACS workstation. ⋯ RECIST 1.1 has poor sensitivity for detecting metabolic responses classified by EORTC PET criteria. EORTC PET criteria, Choi criteria, and tumor attenuation criteria appear to be equally reliable surrogate imaging biomarkers of liver PFS after RE in patients with CLM.
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AJR Am J Roentgenol · Sep 2016
Technique for CT Fluoroscopy-Guided Lumbar Medial Branch Blocks and Radiofrequency Ablation.
The purpose of this study is to describe the procedure for CT fluoroscopy-guided lumbar medial branch blocks and facet radiofrequency ablation. ⋯ CT fluoroscopic guidance allows more-precise needle tip positioning and is an alternative method for performing medial branch blocks and facet radiofrequency ablation.
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AJR Am J Roentgenol · Sep 2016
Safety and Quality of 1.5-T MRI in Patients With Conventional and MRI-Conditional Cardiac Implantable Electronic Devices After Implementation of a Standardized Protocol.
The purpose of this study was to evaluate the safety and diagnostic utility of 1.5-T MRI examinations of individuals with conventional and MRI-conditional cardiac implantable electronic devices (CIEDs). ⋯ Establishment of a multidisciplinary work flow allows individuals with conventional and MRI-conditional CIEDs to safely undergo 1.5-T MRI with diagnostic questions consistently answered.
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AJR Am J Roentgenol · Aug 2016
Distinguishing Untreated Osteoblastic Metastases From Enostoses Using CT Attenuation Measurements.
The purpose of this study was to determine whether CT attenuation thresholds can be used to distinguish untreated osteoblastic metastases from enostoses. ⋯ CT attenuation measurements can be used to distinguish untreated osteoblastic metastases from enostoses. A mean attenuation of 885 HU and a maximum attenuation of 1060 HU provide reliable thresholds below which a metastatic lesion is the favored diagnosis.
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AJR Am J Roentgenol · Aug 2016
ReviewIntraosseous Vascular Access in Radiology: Review of Clinical Status.
Paramedics and hospital-based providers occasionally need to place intraosseous devices to obtain vascular access in critically ill patients. Diagnostic radiologists must be prepared for the emergent administration of iodinated contrast media via the intraosseous route, and interventional radiologists should be familiar with the potential clinical uses of such access. ⋯ We present a protocol for the administration of iodinated contrast media through the intraosseous route. We also highlight the clinical and radiologic aspects of intraosseous access.