Acta radiologica
-
Randomized Controlled Trial Comparative Study Clinical Trial
Prospective randomized study for an injection protocol for intravenous contrast media in abdominal and pelvic helical CT.
To develop an injection protocol for intravenous administration of contrast media in abdominal and pelvic helical CT which provides optimal contrast enhancement of arterial and venous vessels. ⋯ For routine abdominal and pelvic helical CT, we recommend an injection of 120 ml contrast medium with a flow rate of 3.0 ml/s. Contrast-enhanced examination of the liver should be started after 50 s, and examination of the lower abdomen and pelvis region should be performed without any further delay. This gives an appropriate contrast in the major vessels.
-
To study frequency and extent of meningeal enhancement in patients with and without post-lumbar puncture headache (PLPH) with cerebral MR with Gd-DTPA. ⋯ PLPH is related to increased Gd-DTPA enhancement of the meninges, although the increase in enhancement during PLPH is minor in most cases. Pronounced enhancement of the meninges after lumbar puncture may predict long duration of the PLPH.
-
Invasive breast carcinomas and fibroadenomas are often difficult to differentiate in dynamic contrast-enhanced T1-weighted MR imaging of the breast, because both tumors can enhance strongly after contrast injection. The purpose of this study was to evaluate whether the addition of T2*-weighted first pass perfusion imaging can increase the differentiation of malignant from benign lesions. ⋯ Addition of a T2*-weighted first pass perfusion sequence with a high temporal resolution can probably increase the differentiation of fibroadenomas from invasive carcinomas in contrast-enhanced MR imaging of the breast.
-
Comparative Study
Embolotherapy for pulmonary arteriovenous malformations in patients with hereditary hemorrhagic telangiectasia (Rendu-Osler-Weber syndrome).
To evaluate the clinical results of embolization of pulmonary arteriovenous malformations (PAVMs) in patients with hereditary hemorrhagic telangiectasia (HHT), the Rendu-Osler-Weber syndrome. ⋯ Embolotherapy is a definitive treatment for PAVMs: it is very effective with a high success rate and few complications. Patients with HHT are at risk of PAVM and should be screened and treated for PAVMs when these reach a size that is associated with complications. In the detection of PAVMs, contrast echocardiography is a very sensitive method, and follow-up of these patients can be done with contrast echocardiography.
-
Comparative Study
Clinical outcome of stenting in superior vena cava syndrome associated with malignant tumors. Comparison with conventional treatment.
We analyzed the clinical outcome of treatment with the expandable metallic stent (EMS) for the superior vena cava (SVC) syndrome associated with malignant tumors, and the results were compared with those of radiotherapy. ⋯ The clinical symptoms showed similar improvement in patients receiving EMS placement or radiotherapy. EMS placement was effective in relieving clinical symptoms in patients who had failed to respond to radiotherapy.