x ray computed tomography

..To determine whether dynamic contrast material-enhanced magnetic resonance (MR) imaging with use of kinetic and morphologic parameters reveals statistically significant differences between malignant and benign solitary pulmonary nodules...

..Intravenous tissue-type plasminogen activator can be beneficial to some patients when given within 3 hours of stroke onset, but many patients present later after stroke onset and alternative treatments are needed...

..The purpose of this study was to evaluate the diagnostic accuracy of electrocardiographically gated 64-multidetector row coronary computed tomographic angiography (CCTA) in individuals without known coronary artery disease (CAD)...

..011) and femorotibial mismatch (p = 0.037). Standing alignment was also improved (p = 0.004) and blood loss was less (p = 0.0001). Computer-assisted surgery took longer with a mean increase of 13 minutes (p = 0.0001)...

..Our aim was to determine whether low leg muscle mass and greater fat infiltration in the muscle were associated with poor lower extremity performance (LEP)...

..To develop guidelines for performing and interpreting positron emission tomography (PET) imaging for treatment assessment in patients with lymphoma both in clinical practice and in clinical trials...

..These findings suggest that the morphological phenotypes of COPD show several clinical characteristics and different responsiveness to treatment with bronchodilators and inhaled corticosteroids...

..This study sought to determine the diagnostic accuracy of 64-slice computed tomographic coronary angiography (CTCA) to detect or rule out significant coronary artery disease (CAD)...

..01). We conclude that CT measurements of airways with a Pi of 0.75 cm or more could be used to estimate the dimensions of the small conducting airways, which are the site of airway obstruction in chronic obstructive pulmonary disease...

..This classification is increasingly used as a predictor of outcome. We aimed to examine the predictive value of the Marshall CT classification in comparison with alternative CT models...

..In a computed tomographic (CT) angiography study, we identified the characteristics of atherosclerotic lesions that were associated with subsequent development of acute coronary syndrome (ACS)...

..Nutritional deficiencies may be modifiable risk factors. A paediatric anticoagulation trial may be required, after the natural history has been further established from registries of cases with and without treatment...

..To estimate cumulative radiation exposure and lifetime attributable risk (LAR) of radiation-induced cancer from computed tomographic (CT) scanning of adult patients at a tertiary care academic medical center...

..Technological improvements to the system could increase the sensitivity and specificity for the detection of pulmonary nodules and reduce these false-positive results...

..To determine the test performance and longitudinal evolution of air trapping for diagnosing bronchiolitis obliterans syndrome (BOS)...

..Assessment of change in nodule size by the computer matched that by the thoracic radiologist (Spearman rank correlation coefficient, 0.932)...

..To investigate the feasibility and the clinical response of a stereotactic single-dose radiation treatment for liver tumors...

..However, care should be taken in lymph node staging for patients who have other pulmonary complications, including interstitial pneumonitis, previous pulmonary tuberculosis and silicosis...

..The National Oncologic PET Registry (NOPR) was developed to meet these coverage requirements and to assess how PET affects care decisions...

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..We assessed whether population-based mass screening with a spiral computed tomography scanner could contribute substantially to detection of smaller cancers, and decrease mortality...

..CONCLUSIONS: Sinovenous thrombosis in children affects primarily neonates and results in neurologic impairment or death in approximately half the cases. The occurrence of venous infarcts or seizures portends a poor outcome...

..To report our experience with technical success, complications, and long-term clinical success of radiofrequency (RF) ablation of osteoid osteoma...

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..The findings of this study demonstrate that acute exacerbation of idiopathic pulmonary fibrosis is rather common and this exacerbation is likely to have a spectrum of severity...

..We present the guidelines for target volume determination and delineation of head-and-neck lymph nodes based on the analysis of the patterns of nodal failure in patients treated with intensity-modulated radiotherapy (IMRT)...

..The purpose of this study was to review our institutional experience with congenital cysts of the mediastinum, emphasizing the clinical spectrum of the disease...

..In addition, the relation between calcium score and MSCT findings was explored...

..In this study, we systematically assessed the diagnostic and prognostic value of absence of coronary artery calcification (CAC) in asymptomatic and symptomatic individuals...

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..These findings show that CAC is associated with an increased risk of CHD events in asymptomatic women and men...

..We hypothesized that the mechanism for aortic valve calcification is similar to skeletal bone formation and that this process is mediated by an osteoblast-like phenotype...

..In this article we clarify the principles of texture analysis and give examples of its applications, reviewing studies of the technique...

..Additionally, the role of the radiologist as an integral part of the multidisciplinary team of surgeons, endocrinologists, and cytologists working together to identify those patients with the highest risk of malignancy will be explored...

..The limitations of utilization of these markers for both cross-sectional diagnosis of fibrosis and monitoring disease progression or regression are discussed...

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..Intracardiac thrombus formation is a rare but serious complication of Behçet's disease. We aimed to review the clinical and pathologic correlates of cardiac thrombus formation in the context of Behçet's disease...

..Varicella-associated AIS has characteristic features, including a 2-fold increase in recurrent AIS and transient ischemic attacks. Varicella is an important risk factor for childhood AIS...

..The Early Lung Cancer Action Project (ELCAP) is designed to evaluate baseline and annual repeat screening by low-radiation-dose computed tomography (low-dose CT) in people at high risk of lung cancer. We report the baseline experience...

..To our knowledge, this is the initial case of HAL radical heminephrectomy for renal-cell carcinoma in a horseshoe kidney. Appropriate pre-operative imaging and surgical technique for the isthmusectomy are highlighted...

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..The aim of this study was to compare the prognostic power of PET and ceCT and to evaluate the clinical role of PET/CT imaging...

..e. modeling the finite collimator spatial resolution in iterative reconstruction algorithms) can significantly reduce the partial volume errors...

..The aim of this study was to compare the detection of bone metastases by 99mTc-methylene diphosphonate (99mTc-MDP) planar bone scintigraphy (BS), SPECT, 18F-Fluoride PET, and 18F-Fluoride PET/CT in patients with high-risk prostate cancer...

..Standardized uptake values may be helpful in predicting benign versus malignant histology...

..To prospectively evaluate accuracy of multi-detector row computed tomographic (CT) images for preoperative staging of gastric cancer by using surgical and histopathologic results as reference standards...

..The goal of this study was to compare the ability of multidetector CT/CTA and MR imaging/MRA to detect common imaging findings of dissection...

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..To prospectively evaluate the sensitivity and specificity of dual-source CT for significant coronary stenosis (>50% narrowing) in patients with atrial fibrillation (AF), by using conventional coronary angiography as the reference standard...

..We sought to describe the HRCT scan abnormalities of a large severe asthma cohort and to determine the utility of clinical features to direct the use of HRCT scanning in this group of patients...

..The importance of standardization of coronary artery calcium measurements by multi-detector CT is discussed...

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..We evaluated coronary angiography using whole-heart 320-row CT, which avoids exposure-intensive overscanning and overranging...

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..In summary, an important role for TIEG in skeletal development and/or homeostasis is indicated...

..To find an effective, safe immunosuppressive regimen as an alternative to cyclophosphamide (Cy) for the treatment of clinically evident diffuse scleroderma (dSSc)-associated alveolitis of recent onset...

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..This difference was significant for tumor staging but not for the staging of lymph nodes and metastases...

..By using clinical, demographic, and imaging findings, one can significantly limit the differential diagnosis for many of the most common intraventricular neoplasms...

..The outcome among patients with clinical stage I cancer that is detected on annual screening using spiral computed tomography (CT) is unknown...

..Those originating from the sympathetic cervical chain are rare. We describe our experience with the clinical presentation, surgical management, and outcomes of patients with this pathology...

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..IGs, particularly when large, may be mistaken for a bone tumour. Correlation of the typical radiographic and MR imaging features will indicate the correct diagnosis and obviate the need for biopsy...

..To evaluate computed tomography (CT)-guided brachytherapy in patients with very large liver malignancies or with liver tumors located adjacent to the liver hilum...

..A subgroup of AD patients without increased tau levels was characterized by a significantly larger percentage of patients with presenile onset...

..Systematic surveys with advanced non-invasive imaging techniques have revealed that hepatic cysts are quite common in the general population. Therefore, we retrospectively examined our case series and compared it with the literature...

..After brachytherapy, all patients developed T2 hyperintensity; stable or progressive enhancement occurred with tumor recurrence and radionecrosis. High choline levels were suggestive of, but not necessarily diagnostic of, tumor...

..3%. CONCLUSION: Unenhanced hepatic MR imaging provides a high negative predictive value with regard to the detection of hepatic metastasis in the preoperative evaluation of rectal cancer...

..With progressive cirrhosis, however, hemangiomas are likely to decrease in size, become more fibrotic, and are difficult to diagnose radiologically and pathologically...

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..Surgical treatment options include selective decompression techniques like foraminotomy, medial facettectomy and undercutting as well as hemilaminectomy, laminotomy and wide laminectomy or fusion...

..Anterior orbitotomy has become an important surgical procedure in the treatment of orbital cavernous hemangioma with excellent effect...

..However, a negative result must be confirmed with either close follow-up or, preferably, open biopsy, especially in cases of sclerotic lesions for which diagnostic accuracy is decreased and the false-negative rate is high...

..003). In conclusion, a severe baseline NIHSS score, a critical level of pretreatment DWI/PWI parameters and a proximal site of occlusion are predictive of a worse outcome after IV rt-PA for acute ischemic stroke...

..For the preoperative MRI staging of prostate cancer, the accuracy has been stated to be between 51 % and 97 %...

..This suggests that positive clinical responders retained parenchymal elasticity, emphasizing the importance of dynamic changes in this cohort...

..To compare the results of whole-body magnetic resonance (MR) imaging with staging based on computed tomographic (CT), dedicated MR imaging, and nuclear scintigraphic results as standard of reference...

..CONCLUSION: The common CT findings of metastatic angiosarcoma in our series were multiple hypoattenuating lesions often associated with nodular enhancement and cystic lesions with hemorrhagic change...

..Eleven patients experienced metastasis in vertebrae that were not surgically treated. CONCLUSION: Intraoperative radiation therapy appears to achieve good palliation and may be useful for local control of spinal metastases...

..Long-term follow-up (mean 5.6 years) revealed no further misdiagnosis...

..A retrospective study evaluating early halo immobilization of Types II and IIA hangman's fractures...

..CONCLUSION: The clinical outcomes of the patients within this case series suggest that repeat percutaneous vertebroplasty performed at previously treated vertebral levels for recurrent pain offer therapeutic benefit...

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..Furthermore, dorsal decompression of OPLL may promote a more rapid progression of OPLL growth and concomitant neurologic deterioration...

..55) and MRI (0.57) (p = 0.61). CONCLUSION: Dynamic MRI with double-echo FLASH imaging can detect hypervascular hepatocellular carcinoma as well as dynamic helical CT imaging with double arterial phase...

..Recognizing the location in which this entity characteristically arises and identifying small amounts of intradiverticular gas when it is present may aid in establishing the correct diagnosis in patients with duodenal diverticula...

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..Four of 19 patients had previous spinal surgery for sciatica or spinal stenosis, 6 of 19 had epidural injections, 17 of 19 had magnetic resonance imaging or computed tomography, and 3 of 19 had electrodiagnostic studies...

..CONCLUSION: Although cervicofacial actinomycosis occurs infrequently, it should be included in the differential diagnosis when images show a soft-tissue mass with inflammatory changes and an infiltrative nature in the cervicofacial area...

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..Study Design: We conducted a retrospective case review...

..MR examination gave definitive answer about the healing process in 18 cases (90%). CONCLUSION: MR investigation was superior to the other imaging techniques in the evaluation of mycetoma and the assessment of therapy...

..CONCLUSIONS: The results of the current series demonstrate both the superiority of magnetic resonance imaging for diagnosis of SSEH as well as the necessity of early decompressive surgery in cases of sensorimotor paralysis after SSEH...

..In order to minimise acute or late toxicity and the risk of radiation-induced neoplasms the total dose should not exceed 30 Gy...

..Thus far, no graft/plate or vertebral body fracture or extrusions have been seen with dynamic plates, whereas the absence of plating and constrained and semi-constrained plating systems have failed...

..We report our 10-year experience with the diagnosis and treatment of eight accessory parotid gland neoplasms that have been followed by the senior authors...

..Computer-based 3D measurement of aortoiliac tortuosity is feasible and clinically meaningful. Its ultimate role in relation to human assessment must be further defined in future studies...

..It is essential to differentiate the two conditions because they warrant different therapeutic interventions. The objective of this study is to elucidate the different radiologic characteristics of the conditions...

..We believe that this application addresses the goals of the NIH in offering the RFA and the goals of UMMS to expand use on our campus of small animal imaging. ..

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..The result will be clinicians, scientists, and engineers trained for the next generation of conventional and molecular imaging techniques. ..

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..PUBLIC HEALTH RELEVANCE This application proposes the continued development of a dedicated breast PET-CT system. This device could be instrumental in the detection, diagnosis and treatment assessment of breast cancer. ..

..PUBLIC HEALTH RELEVANCE This application proposes the continued development of a dedicated breast PET-CT system. This device could be instrumental in the detection, diagnosis and treatment assessment of breast cancer. ..

..We anticipate that the scanner will have many applications in biomedical research including studying disease development and response to novel therapeutics in vivo. ..

..The optimized techniques will be clinically evaluated in the carotid arteries, lungs and abdomen. Successful completion of this work will place CE-MRA as a stronger competitor to the more invasive X-ray DSA technique. ..

..Experimental testing will help to keep computational models realistic and valid while three dimensional computational modeling will enhance the scientific basis of orthotic design and testing. ..

..Experimental testing will help to keep computational models realistic and valid while three dimensional computational modeling will enhance the scientific basis of orthotic design and testing. ..

..Acquisition of this equipment will enable our institutions to engage in biomedical research highly relevant to pathophysiological processes and animal models of human diseases. ..

..The predicted optimal orthotic design for a given foot structure can then be manufactured and evaluated in a clinical trial during later phases of the research. ..

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..Thus, space and utilities for the instrument plus the salary and benefits for the research nuclear medicine technologist will be provided by the Ohio State University Comprehensive Cancer Center. ..

..Appropriate phantoms will be used to quantitatively assess image quality and dose. Finally, the dual-modality ASETT system will be clinically evaluated with pilot patient studies. ..

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..for reducing the size of the imager and the effective dosage) but to evaluate the device through clinical trials for the specific task of resection of brain tumors. ..

..Another long-term vision for this system is its miniaturization to a table-top research instrument. ..

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..Lynda Powell, Peter Buttrick, Kiang Liu, George Kondos), psychophysiological research (Dr. Stephen Porges) and who are experienced in the psychopathology and treatment of anxiety disorders (Dr. Richard Heimberg). ..

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