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11:04 EDT 23rd March 2019 | BioPortfolio

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Showing PubMed Articles 1–25 of 381 from The British journal of radiology

Feasibility of an ADC-based radiomics model for predicting pelvic lymph node metastases in patients with stage IB-IIA cervical squamous cell carcinoma.

To investigate the prediction value of a radiomics model based on apparent diffusion coefficient (ADC) maps for pelvic lymph node metastasis (PLNM) in patients with stage IB-IIA cervical squamous cell carcinoma (CSCC).

Stiffness of prostate gland measured by transrectal Real-Time shear wave elastography for detection of prostate cancer: A feasibility study.

This study aimed to evaluate the value of the Young's modulus obtained by transrectal real-time shear wave elastography (SWE) for detection of prostate cancer (PCa).

Neuroimaging reward, craving, learning, and cognitive control in substance use disorders: review and implications for treatment.

Substance use disorder is a leading causes of preventable disease and mortality. Drugs of abuse cause molecular and cellular changes in specific brain regions and these neuroplastic changes are thought to play a role in the transition to uncontrolled drug use. Neuroimaging has identified neural substrates associated with problematic substance use and may offer clues to reduce its burden on the patient and society. Here, we provide a narrative review of neuroimaging studies that have examined the structures ...

CT support of cardiac structural interventions.

Due to its high temporal and isotropic spatial resolution, CT has become firmly established for pre-procedural imaging in the context of structural heart disease interventions. CT allows to very exactly measure dimensions of the target structure, CT can provide information regarding the access route and, as a very valuable addition, volumetric CT data sets can be used to identify fluoroscopic projection angulations to optimally visualize the target structure and place devices. This review provides an overvi...

Large hospital variation in the utilization of Post-procedural CT to detect pulmonary embolism/Deep Vein Thrombosis in Patients Undergoing Total Knee or Hip Replacement Surgery: Japanese Nationwide Diagnosis Procedure Combination Database Study.

The purpose of the study was to investigate variation in the use of in-hospital computed tomography (CT) for venous thromboembolism (VTE) detection after total knee or hip replacement (TKR/THR) among surgical patients, using a nationwide Japanese in-hospital administrative database.

Tumor-stromal ratio (TSR) of invasive breast cancer: Correlation with multi-parametric breast MRI findings.

To correlate the tumor-stromal ratio (TSR) of invasive breast cancer and MRI findings.

Does the clinical information play a role in the magnetic resonance diagnostic confidence analysis of ovarian and deep endometriosis?

Some recent studies have explored how the experience in the observers change their performance in the endometriosis detection using MRI but the effects of the clinical information remains uncertain. The purpose of this study was to assess the effect of the clinical information in the diagnostic confidence in the MRI diagnosis of endometriosis.

Internet-based measurement of visual assessment skill of trainee radiologists: developing a sensitive tool.

Expert radiologists exhibit high levels of visual diagnostic accuracy from review of radiological images, doing so after accumulating years of training and experience. To train new radiologists, learning interventions must focus on the development of these skills. By developing a web-based measure of image assessment, a key part of visual diagnosis, we aimed to capture differences in the performance of expert, trainee and non-radiologists.

Added value of diffusion-weighted imaging for evaluation of extramural venous invasion in patients with primary rectal cancer.

To evaluate the added value of diffusion-weighted imaging (DWI) to T weighted imaging (T WI) for detection of extramural venous invasion (EMVI) in patients with primary rectal cancer.

Comparison of prostate delineation on multimodality imaging for MR-guided radiotherapy.

With increasing incorporation of MRI in radiotherapy, we investigate two MRI sequences for prostate delineation in radiographer-led image guidance.

Detection of avascular necrosis on routine diffusion weighted whole body MRI in patients with multiple myeloma.

Current therapies for multiple myeloma, which include corticosteroids, increase risk of avascular necrosis. The aim of this study was to assess incidental detection of femoral head avascular necrosis on routine whole body MRI including diffusion weighted MRI.

Stereotactic body radiation therapy in cholangiocarcinoma: a systematic review.

Stereotactic radiotherapy (SBRT) has been used in the treatment of cholangiocarcinoma (CC) but toxicity and clinical results of SBRT in CC are still limited and sparse. Therefore, the aim of this systematic review was to analyze the results of SBRT in the setting of advanced CC.

The MRI characteristics of Non-mass enhancement lesions of the breast: Associations with malignancy.

The American College of Radiology updated the terms used for expressing the imaging characteristics of non-mass enhancement (NME) lesions in the fifth edition of the breast imaging-reporting data system (BI-RADS) lexicon. Both the distribution and internal enhancement descriptors were revised for NME lesions. Our aim was to determine the MRI characteristics of NME lesions and to investigate their association with malignancy.

Impact of different image reconstructions on PET quantification in non-small cell lung cancer: a comparison of adenocarcinoma and squamous cell carcinoma.

Positron emission tomography (PET) using 18F-fluordeoxyglucose (F-FDG) is an established imaging modality for tumor staging in patients with non-small cell lung cancer (NSCLC). There is a growing interest in using F-FDG PET for therapy response assessment in NSCLC which relies on quantitative PET parameters such as standardized uptake values (SUV). Different reconstruction algorithms in PET may affect SUV. We sought to determine the variation of SUV in patients with NSCLC when using ordered subset expectati...

Mild hyperthermia as a localized radiosensitizer for deep-seated tumors: Investigation in an orthotopic prostate cancer model in mice.

Non-ablative or mild hyperthermia (HT) has been shown in preclinical (and clinical) studies as a localized radiosensitizer that enhances the tumoricidal effects of radiation. Most pre-clinical in vivo HT studies use subcutaneous tumor models which do not adequately represent clinical conditions (e.g. proximity of normal/critical organs) or replicate the tumor microenvironment - both of which are important factors for eventual clinical translation. The purpose of this work is to demonstrate proof-of-concept ...

Quantitative analysis of image metrics for reduced and standard dose pediatric F-FDG PET/MRI examinations.

The study performs a comprehensive analysis of image metrics to objectively support the reduction of injected activity in pediatric oncology F-FDG PET/MR (F-fludeoxyglucose PET/MR) examinations. Contrast-to-Noise Ratio (CNR), Normalized Noise (NN), tumor burden, and standardized uptake value (SUV) parameters stability were investigated to robustly define the acceptable reduced activity level that preserves the clinical utility of images, considering different PET applications.

Should we be moving to a national standardized non-gadolinium MR imaging protocol for the surveillance of vestibular schwannomas?

To examine whether the model of Getting It Right First Time (GIRFT) could be relevant to the surveillance of non-operated vestibular schwannomas (vs) by testing the following hypotheses: (1) in the UK there is a great variation in the imaging protocol for the follow-up of vs; (2) high-resolution, T weighted MRI (HRT W-MRI) has an equivalent accuracy to gadolinium-enhanced T weighted MRI (Gd-MRI) in the assessment of vs size and; (3) imaging with HRT W-MRI rather than Gd-MRI could offer financial savings.

MRI-based assessment and characterization of epicardial and paracardial fat depots in the context of impaired glucose metabolism and subclinical left-ventricular alterations.

To analyze associations between epicardial and paracardial fat and impaired glucose tolerance as well as left ventricular (LV) alterations.

The associated factors for radiation dose variation in cardiac CT angiography.

This study aimed to examine the associated factors for dose variation and influence CCTA dose benchmarks in current CT imaging centres.

Diagnostic performance of contrast-enhanced and unenhanced combined pulmonary artery MRI and magnetic resonance venography techniques in the diagnosis of venous thromboembolism.

We aimed to determine the diagnostic performance of the contrast-enhanced and unenhanced combined pulmonary arterial MRI and magnetic resonance venography techniques in the diagnosis of venous thromboembolism (VTE).

An orthotopic non-small cell lung cancer model for image-guided small animal radiotherapy platforms.

Lung cancer is the deadliest cancer worldwide. To increase treatment potential for lung cancer, preclinical models that allow testing and follow up of clinically relevant treatment modalities are essential. Therefore, we developed a single-nodule-based orthotopic non-small cell lung cancer (NSCLC) tumor model which can be monitored using multimodal non-invasive imaging to select the optimal image-guided radiation treatment plan.

Error in radiology - where are we now?

Error is inherent in radiological practice. Our awareness of the extent of this and the reasons behind it has increased in recent times. Our next step must be the development of a shared understanding with our patients of the limitations as well as the huge benefits of medical imaging.

Volumetric analysis at abdominal CT: oncologic and non-oncologic applications.

Volumetric analysis is an objective 3D assessment of a lesion or organ that may more accurately depict the burden of complex objects compared to traditional linear size measurement. Small changes in linear size are amplified by corresponding changes in volume, which could have significant clinical implications. Though early methods of calculating volumes were time-consuming and laborious, multiple software platforms are now available with varying degrees of user-software interaction ranging from manual to f...

Impact of modern radiotherapy techniques on survival outcomes for unselected patients with large volume non-smallcelllungcancer.

Intensity modulated radiotherapy (IMRT) is used, where necessary, for bulky or complex-shaped, locally-advanced, non-small cell lung cancer (NSCLC). We evaluate our real-world experience with radical radiotherapy including concurrent chemoradiation (CCRT), and analyse the impact of IMRT on survival outcomes in patients with larger volume disease.

The use of texture-based radiomics CT analysis to predict outcomes in early-stage non-small cell lung cancer treated with stereotactic ablative radiotherapy.

Stereotactic ablative radiotherapy (SABR) is being increasingly used as a non-invasive treatment for early-stage non-small cell lung cancer (NSCLC). A non-invasive method to estimate treatment outcomes in these patients would be valuable, especially since access to tissue specimens is often difficult in these cases.

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