AJR. American journal of roentgenology
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The purpose of this review is to describe the current lymph node stations and lymph node staging of non-small cell lung carcinoma. Minimally invasive and invasive methods of mediastinal lymph node staging are emphasized, and the relative accuracy and limitations of each modality are described. ⋯ Lung carcinoma remains the most common cause of cancer death in the United States. Accurate staging of lung cancer is imperative for implementing the correct therapy and assessing patient prognosis.
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AJR Am J Roentgenol · Jul 2012
Contrast-to-noise ratio and low-contrast object resolution on full- and low-dose MDCT: SAFIRE versus filtered back projection in a low-contrast object phantom and in the liver.
The purpose of this article is to evaluate the effect of sinogram-affirmed iterative reconstruction (SAFIRE) on contrast-to-noise ratio (CNR) compared with filtered back projection (FBP) and to determine whether SAFIRE improves low-contrast object detection or conspicuity in a low-contrast object phantom and in the liver on full- and low-dose examinations. ⋯ Lower dose scans reconstructed with SAFIRE have a higher CNR. The ability of SAFIRE to improve low-contrast object detection and conspicuity depends on the radiation dose level. At low radiation doses, low-contrast objects are invisible, regardless of reconstruction technique.
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AJR Am J Roentgenol · Jul 2012
Comparative StudyComparison of MERGE and axial T2-weighted fast spin-echo sequences for detection of multiple sclerosis lesions in the cervical spinal cord.
The purpose of our study was to compare axial multiple-echo recombined gradient echo (MERGE) with axial T2-weighted fast spin-echo (FSE) imaging for the detection of multiple sclerosis (MS) lesions in the cervical spinal cord on MRI. ⋯ MERGE and T2-weighted FSE sequences are complementary. MERGE provided greater sensitivity for cord lesions whereas axial T2-weighted FSE provided improved lesion specificity. Further investigation is required to assess the clinical impact of MERGE in the diagnosis and management of MS.
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The thickness of the prevertebral soft tissue (PVST) is instrumental in helping detect cervical spine injuries in the pediatric population. Current parameters for normal PVST thickness in that population are based on lateral radiographs because there have been no studies to date defining age-dependent normal measurements on MDCT. With the increasingly important role of MDCT in the evaluation of pediatric trauma patients, it is necessary to establish normal values for pediatric PVST thickness on MDCT images. Thus, the purpose of this study is to establish the normal thickness of PVST on MDCT of the pediatric population from 0 to 15 years old. ⋯ The thickness of the PVST is important in the detection of underlying injuries to the cervical spine. MDCT is playing an increasingly important role in the evaluation of pediatric trauma patients. We propose the obtained values as the upper limits of normal for PVST thickness on MDCT images in the pediatric population from 0 to 15 years old.
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AJR Am J Roentgenol · Jun 2012
Prevalence of honorary coauthorship in the American Journal of Roentgenology.
The objective of our study was to determine the prevalence of honorary authorship in articles published in the American Journal of Roentgenology (AJR) and to evaluate the factors that might influence the perception of honorary authorship. ⋯ A substantial proportion of articles had evidence of honorary authorship. The rate of honorary authors was higher among authors who worked in an environment where senior members were routinely added to all manuscripts submitted for publication, authors who perceived that a coauthor listed had only reviewed the manuscript, and authors who reported that someone suggested they should include an honorary author.