European radiology
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Multicenter Study Comparative Study
Whole-body MRI for the detection of bone marrow involvement in lymphoma: prospective study in 116 patients and comparison with FDG-PET.
To assess and compare the value of whole-body MRI with FDG-PET for detecting bone marrow involvement in lymphoma. ⋯ • Bone marrow involvement in lymphoma has prognostic and therapeutic implications. • Blind bone marrow biopsy (BMB) is standard for bone marrow assessment. • Neither whole-body MRI nor FDG-PET can yet replace BMB. • Both techniques have higher sensitivity in aggressive than in indolent lymphoma. • Both imaging techniques are complementary to BMB.
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Comparative Study
Subtractionless first-pass single contrast medium dose peripheral MR angiography using two-point Dixon fat suppression.
To investigate the feasibility of subtractionless first-pass single contrast medium dose (0.1 mmol/kg) peripheral magnetic resonance angiography (MRA) at 1.5 T using two-point Dixon fat suppression and compare it with conventional subtraction MRA in terms of image quality. ⋯ • MRA is increasingly used for vascular applications. • Dixon imaging offers an alternative to image subtraction for fat suppression. • Subtractionless first-pass peripheral MRA is possible using two-point Dixon fat suppression. • Subtractionless peripheral MRA is possible at 1.5 T a single contrast medium dose. • Subtractionless first-pass peripheral MRA provides good image quality with few non-diagnostic studies.
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To evaluate the accuracy of abdominal radiography (AXR) for the detection of residual cocaine packets by comparison with computed tomography (CT). ⋯ • Both abdominal radiography and computed tomography can identify gastrointestinal cocaine packets. • Ten per cent of body packers had residual packets despite two packet-free stools. • Seventy per cent of these residual packets were missed on AXR. • No patient or packet characteristics predicted residual packets or AXR false negativity. • CT is necessary to ensure safe medical discharge of body packers.
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To evaluate the efficacy of transcatheter arterial embolisation (TAE) using N-butyl-2-cyanoacrylate (NBCA) in the treatment of postpartum haemorrhage (PPH) due to ruptured pseudoaneurysm. ⋯ • Transcatheter arterial embolisation is a safe and effective treatment for postpartum haemorrhage. • NBCA is potent embolic material to treat bleeding patients with severe coagulopathy. • NBCA does not seem to adversely affect future fertility.
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To define thresholds of safe local temperature increases for MR equipment that exposes patients to radiofrequency fields of high intensities for long duration. These MR systems induce heterogeneous energy absorption patterns inside the body and can create localised hotspots with a risk of overheating. ⋯ • Standard MRI can cause local heating by radiofrequency absorption. • Monitoring thermal dose (in units of CEM43°C) can control risk during MRI. • 9 CEM43°C seems an acceptable thermal dose threshold for most patients. • For skin, muscle, fat and bone,16 CEM43°C is likely acceptable.