Ferumoxytol-enhanced MR demonstration of changes to internal placental structure in placenta accreta spectrum: Preliminary findings.

Introduction: The goal of this pilot study is to determine if ferumoxytol-enhanced MR might provide a new approach to the diagnosis of placenta accreta spectrum (PAS), and if so, to identify signs of PAS.

Methods: Ten pregnant women were referred for MRI evaluation for PAS. MR studies consisted of pre-contrast SSFSE, SSFP, DWI, and ferumoxytol-enhanced sequences.

Ferumoxytol-enhanced magnetic resonance imaging with volume rendering: A new approach for the depiction of internal placental structure in vivo.

Introduction: Placental function is vitally important, but placental assessment is limited by current imaging methods in vivo. The goal of this study is to determine if ferumoxytol-enhanced MR studies might be used to depict placental structure during pregnancy.

Methods: Ten pregnant women were referred for MRI evaluation of abnormal placentation.

Normal placental structural anatomy: ultrasound and doppler features elucidated with US-MR image fusion and ferumoxytol-enhanced MRI.

Purpose: To elucidate ultrasound features of normal placental anatomy through correlation of gray-scale and ultrasound Doppler with ferumoxytol-enhanced MRI features using US-MR image fusion.

Methods: All patients referred to MR for ultrasound findings worrisome for PAS (placenta accreta spectrum) were included in this retrospective study. MR studies included a ferumoxytol-enhanced T1-weighted MRI.

Placenta accreta spectrum: the pattern and character of intraplacental blood flow by color and spectral Doppler.

Purpose: To characterize intraplacental blood flow patterns in placenta accreta spectrum (PAS) with color and spectral Doppler imaging.

Methods: Thirty-two patients at risk for PAS underwent ultrasound imaging with both color and spectral Doppler. The placenta was inspected for areas of vascularity by color Doppler, particularly within the lower uterine segment.

Toward Ergonomic Design in Ultrasound Scanning: Strategies to Mitigate Injurious Forces.

Sonographers experience stress-related musculoskeletal injuries at alarming rates. The magnitude of the problem has resulted in substantial economic and human costs. Early efforts, such as the transposition of office ergonomic models to the ultrasound suite, have been only marginally successful because of the vast difference between clerical and sonography work demands.

How to Read an Abdominal CT: Insights from the Visual and Cognitive Sciences Translated for Clinical Practice.

When first learning abdominal CT studies, residents are often given little concrete, practical direction. There is, however, a large literature from the visual and cognitive sciences that can provide guidance towards search strategies that maximize efficiency and comprehensiveness. This literature has not penetrated radiology teaching to any great extent.

Ultrasound Imaging of Superficial Venous Thrombosis in the Upper and Lower Extremities: Closing the Gap Between Clinical Management Guidelines and Ultrasound Practice Parameters.

Superficial venous thrombosis (SVT) of the upper and lower extremities has long been considered a relatively benign condition. But in recent years, the literature has suggested a benefit to anticoagulation in patients with certain thrombus characteristics (size, location, and distance to deep venous system) resulting in updates to clinical guidelines for the treatment of lower extremity SVT. Despite these now well-established guidelines, there remains a paucity of guidance from national and international societies regarding the imaging of superficial veins when evaluating for venous thrombosis.

Respiratory Fluctuation of Peak Systolic Velocities in the Carotid Doppler Waveforms of Patients With Obstructive Airway Disease: Evidence of Pulsus Paradoxus With Experimental Validation.

Objectives: To characterize fluctuations in peak systolic velocities (PSVs) in Doppler waveforms of the carotid artery in patients with and without obstructive airway disease and in volunteers subjected to incremental levels of airway resistance in an experimental model.

Methods: The PSV variation in common carotid waveforms was measured in 100 patients who had had a carotid ultrasound examination and no respiratory or carotid disease. This was compared to that of patients who had this study during an admission for acute exacerbation of chronic obstructive pulmonary disease (COPD).

Measurement of the Internal Carotid Artery Cross-Sectional Area: Systematic Differences Depending on Grayscale, Power Doppler, and Color Doppler Techniques.

Objectives: To determine how measurements of the internal carotid artery (ICA) cross-sectional area will differ systematically when obtained by grayscale, color Doppler, and power Doppler imaging.

Methods: A total of 451 patients had greater than 40% diameter stenosis in at least a single ICA. Anteroposterior and transverse luminal diameters were measured in 609 arteries on grayscale, color, and power Doppler transverse images of the carotid bulb and proximal and distal ICAs.