1,720,994 research outputs found
Easy Scheme Outlining the Various Morphological and Vascular Abnormalities of the Lymph Node Structure Associated with Recent COVID-19 Vaccination, Each with a Different Clinical/Diagnostic Management
Full text linkThroughout this recent ongoing SARS-CoV-2 pandemic, the European Society of Breast Imaging have surely contributed in improving the management of unilateral axillary adenopathy appearance homolaterally to the side of vaccine inoculation. After considering the patient's COVID-19 history of vaccination, our group produced a day-to-day scheme that evaluates meticulously the probability of mammary malignancy, according to the lymph node characteristics including vascular abnormalities. It comprises of a UN (ultrasound node) score ranging from 2 to 5, that increases with the suspicion of malignancy. In this setting and in view of the additional incoming COVID-19 boost-dose vaccinations, we believe our model could be of great utility to radiologist when assessing patients whom do not have a straight forward diagnosis, in order to reduce breast cancer missed diagnosis, avoid delaying vaccinations, reduce rescheduling of breast imaging examinations and lastly avoid unnecessary lymph node biopsies
Mayer-Rokitansky-Kuster-Hauser Syndrome diagnosed by Magnetic Resonance Imaging. Role of Imaging to identify and evaluate the uncommon variation in development of the female genital tract.
Full text linkLow-dose CT protocol for orthodontic diagnosis.
Full text linkAIM: This was to correlate the dosimetric evaluation with high diagnostic
accuracy by suggesting a protocol that significantly reduces the dose
administered by a Dentascan exam without affecting diagnostic accuracy.
MATERIALS AND METHODS: 17 patients were selected consecutively (7 males and 10
females) of a mean age of 11.2 (8-14 years) who sought orthodontic treatment.
They needed CT control before and after treatment with RME to evaluate impacted
canines. The study was performed using a multidetector 16-rows CT with two
protocols that provided 2 different KV acquisition parameters: 80 KV or 120 KV.
Radiation dose was evaluated in two ways: CTDI and DLP. Image quality was rated
and the results were compared to identify significant differences in terms of
image quality, radiation exposure and presence of artefacts.
RESULTS: The 80 KV scanning has a significantly lower effective radiation dose
compared to the 120 KV scanning (p <0.05). The images of all patients were used
for comparing the protocols in terms of image quality. The mean scores for the 80
KV scanning images were 4.18 +/-0.81 and 4.41 +/-0.80 for dose obtained by 120 KV
scanning. The median image quality was 4 (good) for both protocols. The 80 KV
protocol allowed, as well as the 120 KV, a careful analysis by the orthodontist
and the dental surgeon that together, based on this images, can choose the best
line of treatment between several available options.
CONCLUSION: 80 KV protocols compared with 120 KV protocols resulted in reduced
total radiation dose without relevant loss of diagnostic image information and
quality. The images were good enough to obtain information about the exact
position of impacted teeth and to plan the best line of surgical treatment and
mechanotherapy strategy
Infraclavicular subpectoral lipoma causing thoracic outlet syndrome
No full texttINTRODUCTION: Thoracic outlet syndrome (TOS) includes a group of disorders caused by extrinsic com-pression of neurovascular structures between the 1st rib and clavicle. It usually presents as an enlargingneck mass, with shoulder or upper limb pain, weakness, paresthesias and impalpable radial pulse (Ray-naud’s phenomenon). PRESENTATION OF CASE: We report a rare case of TOS caused by an infraclavicular subpectoral lipomathat, although challenging because of limited access and proximity of vital neurovascular structures,was successfully removed through a simple transaxillary incision with an excellent esthetic result. Thepatients is symptom-free 6 months after surgery. DISCUSSION: Multiplicity of symptoms makes causes, diagnosis, and treatment of TOS controversial.Accurate diagnosis of TOS can be a substantial challenge in practice, because of a lack of physician aware-ness, overlapping of clinical features, and an absence of clearly defined diagnostic criteria. TOS may beassociated with the presence of a benign subpectoral mass like lipomas, that seldom have an irregulardistribution that involve neurovascular structures. CONCLUSION: Although benign soft tissue tumors infraclavicular subpectoral lipomas may exert pressureon neurovascular surrounding structures during their progressive expansion and cause TOS. Therefore,a thorough preoperative study by radiological imaging such as MRI or neurophysiological test shouldalways be performed in order to prevent unintentional lesions of the involved axillo-subclavicular plexusand plan correct surgical procedure
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
Effect of rapid maxillary expansion on nasomaxillary structure and sleep disordered breathing in children with obstructive sleep apnoea
No full textObjective: The aim of this study was to assess the effect of RME on upper airway structure and its relationship to improvements in sleep disordered breathing. Methods: The study was carried out in 23 children with malocclusion and OSA. Clinical assessment visits, daytime sleepiness questionnaire, polysomnography and orthognatodontic examination were performed before (T0) and 4 (T1) and 12 (T2) months after RME. CB CT scans with 2D and 3D reconstructions were performed before (T0) and 12 after months (T2) RME. The relationship between airway changes and improvements in sleep disordered breathing were evaluated. Results: In all cases, opening of the mid-palatal suture was successfully achieved. Volume of the total upper airways, nasal cavity, nasopharynx and oropharynx increased significantly as well as the nasal osseous width. The increase in posterior suture, pterygoid process, maxillary, nasal cross-sectional width were significantly correlated with total upper airway volume, nasal cavity volume, nasopharyngeal airway volume, and oropharyngeal airway volume. The improvement in AHI was correlated with the increase in total upper airway volume at 12 months. Conclusion: The study provides important details about the effect of RME on upper airway structure, including an enlarged posterior suture, pterygoid process, maxillary width and nasal cross-sectional width and enlarged airway volume
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