1,721,125 research outputs found
Use of magnetic resonance angiography in the study of vascular diseases of the thoraco-abdominal area
No full textThe author analyzed basic concepts of MR Angiography, with special attention to comparison between several tecniques and the role of the method in clinical practice by evaluation of the thoracic abdominal vessels pahology in the study of deep venous thrombosi
The impact of magnetic resonance in the preoperative staging and the surgical planning for treating small bowel neoplasms
No full textPURPOSE: The role of MR enteroclysis/enterography (MRE) in the diagnosis of small bowel (SB) tumor has not been fully evaluated. The aims of this study were to assess the capability of MRE correctly identifying the site, stage and histology of such neoplasms.
METHODS: MR enteroclysis/enterography was employed in consecutive patients suspected of having an SB tumor following negative upper and lower endoscopies. The SB was subdivided into proximal jejunum, middle SB and distal ileum. The histological examination (HE) of the surgical specimen was the reference standard.
RESULTS: One hundred and fifty-eight patients were examined. Thirty-one out of 32 (96.9 %) SB detected by HE were correctly identified by MRE. The concordance rate between MRE and HE was 100 % for localization, and 87.1, 80.6 and 96.8 % for T, N and M stages, respectively. The concordance rate was 62.2 % for histological diagnosis.
CONCLUSIONS: The high concordance rates between MRE and HE for the localization of SB tumors and for their staging have a significant impact upon surgical planning, particularly if laparoscopy is being considered. A preoperative histological diagnosis is not sufficiently reliabl
Clinical use of endorectal coil MR in the study of prostatic pathology with special reference to hyperplasia and carcinoma
No full textIn this report we evaluated the usefulness of endorectal surface coil MR imaging in the study of prostatic anatomy, age-related changes, benign prostatic hyperplasia and carcinoma. At present, endorectal coil MR imaging seems to be one of the most important diagnostic steps in the study of prostatic diseases, because it is the technique that allow to gain very high resolution images
Use of endorectal surface coil MR imaging for prostatic pathology with special reference to hyperplasia and carcinoma
No full textImaging of neuroendocrine tumors
No full textNeuroendocrine tumors (NET) of the pancreas are distinguished in functional (85%) and non functional (15%) in relation to the production and release of the hormone produced. Functional tumors show early, because the neoplasm release the hormone produced when they are still small. Non functional tumors show late when the tumor grows. The localization and the evaluation of the extensive of these tumors has come fundamentally important both in correct presurgical detection and also in the diagnosis of metastases which excluded surgery. Also, as the survival of 20% of the patients with metastases is only five years, the use of non-invasive imaging techniques is very important for the evaluation of results of the various therapies (chemotherapy, interferon, somatostatin). Recent studies have shown that in patients with Zollinger-Ellison syndrome, SRS is the most sensitive non invasive method in localizing primitive tumors and metastases. The accuracy of this technique has not yet been provided in the study of tumors like insulinomas which do not have a high percentage of somatostatine receptors on their cell membranes. The sensitivity obtained in recent studies on a large number of patient and the low cost, lower than all the other imaging technique in use today, surely make SRS the first choice in the study of NET. Where SRS is negative and surgery is possible, Spiral CT or better still MRI is the best tool to check the results of chemotherapy in patients with hepatic metastases (already detected by SRS), because it is easier to compare the changes in size and morphology of metastases
Non-seminomatous tumors of the testis: problems of radiological staging before and after treatment
No full textThe aim of this work was to evaluate the usefulness of Computed Tomography and Magnetic Risonance in the staging of the nonseminomatous germ cells tumours of the testis. The authors discussed the role of CT and MR imaging to value the detection of retroperitoneal metastases of the nonseminomatous germ cells tumours of the testis pre and post treatment
Re: Alessandro Sciarra, Valeria Panebianco, Stefano Salciccia, et al. Role of dynamic contrast-enhanced magnetic resonance (MR) imaging and proton MR spectroscopic imaging in the detection of local recurrence after radical prostatectomy for prostate cancer. Eur Urol 2008;54:589-600
No full textRole of Dynamic Contrast-Enhanced Magnetic Resonance (MR) Imaging and Proton MR Spectroscopic Imaging in the Detection of Local Recurrence after Radical Prostatectomy for Prostate Cance
Small bowel imaging of inflammatory bowel disease
No full textThe study of the small bowel (SB) has always been challenging both for clinicians and radiologist. It is a long and tortuous tube that can be affected by various pathologies whose signs and symptoms are usually non specific and can mimic other acute abdominal disorders. For these reasons, imaging plays a central role in the diagnosis of the different pathological conditions that can occur. They are important also in the management and follow up of chronic diseases. We expose and evaluate all the radiological methods that are now available for the study of the SB with particular emphasis on the technological improvement of cross-sectional imaging, such as computed tomography (CT) and magnetic resonance imaging (MRI). These techniques have, infact, highly improved in terms of execution times (fast acquisitions images), patients discomfort and radiation dose, for CT, with consequent reduced biological risks. Moreover, the new post-processing options with multiplanar reconstruction and isotropic images have made significant changes in the evaluation of the exams. Especially MRI scans have been improved by the advent of new sequences, such as diffusion weighted imaging and cine-MRI, parallel imaging and breath-hold sequences and can provide excellent soft-tissue contrast without the use of ionizing radiations
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