European radiology
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Comparative Study
Intravoxel incoherent motion MR imaging for breast lesions: comparison and correlation with pharmacokinetic evaluation from dynamic contrast-enhanced MR imaging.
To compare diagnostic performance for breast lesions by quantitative parameters derived from intravoxel incoherent motion (IVIM) and dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) and to explore whether correlations exist between these parameters. ⋯ • IVIM provided diffusion as well as perfusion information • IVIM could help differential diagnosis of breast lesions • Correlations were found between perfusion-related parameters from IVIM and DCE MRI.
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We prospectively investigated the roles of pretreatment dynamic contrast-enhanced MR imaging (DCE-MRI), diffusion-weighted MR imaging (DWI) and 18F-fluorodeoxyglucose-positron emission tomography (18F-FDG PET)/CT for predicting survival of oropharyngeal or hypopharyngeal squamous cell carcinoma (OHSCC) patients treated with chemoradiation. ⋯ • K ep -tumour, V e -node and SUV max -tumour are independent predictors of survival rates. • The combination of these three prognosticators may help stratification of survival. • MRI and FDG-PET/CT play complementary roles in prognostication of head and neck cancer.
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To assess the impact of the scout view orientation on radiation exposure and image quality in thoracoabdominal CT, when automated tube voltage selection (ATVS) and automated tube current modulation (ATCM) are used in combination with scan planning on a single scout view. ⋯ • The scout view orientation has a significant impact on the radiation exposure. • The scout view orientation has no clinically relevant impact on image quality. • A lateral scout view should be preferred with regard to radiation exposure.
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Head and neck reconstructive surgery after cancer ablative surgery is now commonly performed with closure of the surgical defects by microvascular free tissue transfer. The most common flaps used for reconstruction are the radial forearm flap, the anterolateral thigh flap and fibula flap. Radiographic appearance of these flaps depends on the individual components of the flap, and may consist of skin, fat, muscle and/or bone. There are various adverse outcomes in these patients, the most significant being tumour recurrence that typically occurs at the flap margins. Other flap complications include flap necrosis from vascular thrombosis or infection. The goal of this article is to enhance radiologists' familiarity with different methods of flap reconstruction, flap margins and vascular anastomoses that will lead to a better appreciation of expected postoperative radiographic appearance. ⋯ • Flaps are the most common reconstructive techniques used in neck cancer surgery. • Imaging appearance of flaps depends on their components and time since surgery. • Most tumour recurrence after reconstruction occurs at the margins of the flap.
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Comparative Study
Quantification of early fatty infiltration of the rotator cuff muscles: comparison of multi-echo Dixon with single-voxel MR spectroscopy.
To evaluate quantification of early fatty infiltration in supraspinatus muscles with magnetic resonance (MR) imaging using a T2*-corrected multi-echo 3D-gradient-echo Dixon-based sequence (multi-echo Dixon) and compare it to proton-MR-spectroscopy. ⋯ • Multi-echo Dixon for low fat quantification in muscles is reliable. • Multi-echo Dixon low fat quantification is comparable to single-voxel MR spectroscopy • Multi-echo Dixon detects substantial differences in fatty infiltration within Goutallier 0-1.