1,720,975 research outputs found
Preoperative Work-up: Conventional Radiology, Ultrasonography, CT Scan, and MRI
No full textThe optimal assessment and staging of esophageal cancer (EC) is crucial as it has an important impact on patient selection with respect to appropriate treatment (surgery, neo-adjuvant therapy with or without surgery, palliative treatment) [1]. Preoperative evaluation requires knowledge of the esophageal anatomy and of the patterns of tumor spread. As mentioned in Chap. 2, the staging criteria for esophageal cancer include depth of local invasion, nodal involvement, and presence or absence of distant metastases. The various imaging modalities have different strengths and weaknesses in evaluating each of these criteria such that a combined multimodality imaging approach is usually necessary for an optimal assessment [2]
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
MR imaging and MR cholangiopancreatography of multifocal intraductal papillary mucinous neoplasms of the side branches: MR pattern and its evolution(Article) [Risonanza magnetica (RM) e colangiopancreatografia con RM (CPRM) dei tumori intraduttali papillari mucino-secernenti (TIPM) multifocali dei dotti pancreatici secondari: Semeiotica ed evoluzione]
No full textPURPOSE:This paper describes the magnetic resonance imaging (MRI) and magnetic resonance cholangiopancreatography (MRCP) pattern of multifocal intraductal papillary mucinous tumours (IPMT) of the pancreatic side branches and its evolution during followup.MATERIALS AND METHODS:Twenty-six patients with multifocal IPMT of the side branches were included in this retrospective study. Inclusion criteria were > or =2 ectasic side branches, presence of communication with the main pancreatic duct, and > or =2 MRI/MRCP examinations after > or = 6-12 months. Exclusion criteria were IPMT involving both the main pancreatic duct and its branch ducts, previous surgery and lack of follow-up MRI examinations. Median follow-up was 27 (range 6-59) months. Images were assessed qualitatively and quantitatively. Qualitative assessment considered: the number of cystic lesions of the branch ducts, morphology of the communication between the cystic lesion and the main duct (direct or neck), presence of intraluminal filling defects within the cystic lesions, presence of mural nodules and mural enhancement of the cystic lesion. quantitative assessment considered mean maximal diameter of the cystic lesions and mean length of the communication neck.RESULTS:At diagnosis, the mean number of cystic lesions of the side branches was 7.5. a communication neck was detected in 16/26 patients (60%). Intraluminal filling defects in the side branches were present in 6/26 patients (23%). Mural nodules were seen in 1/26 patients (4%). The mean diameter of the cystic lesions was 18.8 mm. The mean length of the communication neck was 6.9 mm. At follow-up, the mean number of cystic lesions of the side branches was 8.4. A communication neck was detected in 20/26 patients (77%). Intraluminal filling defects in the side branches were detected in 7/26 patients (27%); mural nodules were seen in 2/26 patients (8%). Mural enhancement of the branch duct was detected in 2/26 patients (8%). The mean diameter of the cystic lesions increased to 22.3 mm (p < 0.05), and the mean length of the communication neck was 8.6 mm.CONCLUSIONS:MultifocaL IPMT of the side branches shows a constant but very slow progression over time. In our series, only 2/26 patients showed mural nodules
Ruolo della RM nella valutazione delle neoplasie della cervice uterina localmente avanzate dopo trattamento neo-adiuvante
No full textComparison between Likert scale, prostate imaging reporting and data system (PIRADS) v1 and v2 in detection and characterisation of prostate cancer using multiparametric (mp) MRI
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Valutazione comparativa dell'acquisizione volumetrica tiroidea con ecografia convenzionale B-Mode (US) ed ecografia volumetrica (VUS)
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Imaging of IPMT [Imaging dei tumori papillari intraduttali muco-secernenti del pancreas]
No full textWe describe radiological characteristics of intraductal papillary mucinous tumor (IPMT) of the pancreas, giving a classification of IPMT based on imaging findings at Ultrasound, Computed Tomography, Magnetic Resonance and Cholangiopancreatography with Magnetic Resonance. Different from the first IPMT classification, based on anatomical correlation, we propose a classification based on anatomical, clinical and radiological findings, that describes focal or diffuse main duct IPMT, combined IPMT and unifocal or multifocal side branch IPMT
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