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Biomedical subjects

Elliot K Fishman

Publications and source records attributed to Elliot K Fishman.

At least 109 records · Page 6Linked to original sources
PubMed2002

Visitors and content preferences on an educational web site dedicated to clinical body computed tomography: results of a 2001 audit and online survey.

RATIONALE AND OBJECTIVES: To ascertain demographic characteristics and content preferences of visitors to an educational Web site dedicated to clinical body computed tomography (CT). Such information could help determine whether the resource is attaining its educational goals. METHODS: During February 2001, a commercial Internet service measured the number and average length of visits to the site, the domain names of the visitors, and the content most frequently requested. During the same month, a nine-question self-administered user survey was posted on the site's main page. RESULTS: The service reported 19,013 visits during which 98,685 pages of content were viewed. Of the total number of users to visit, 37.9% were from domains outside North America. Helical CT scanning protocols, teaching atlases, CT teaching files, and medical illustrations were the most frequently requested content. Of the 687 visitors responding to the survey, 51.5% were radiologists and 33.5% were radiological technologists. CONCLUSIONS: Radiologists and radiological technologists are the principal visitors to the site. These users prefer to view helical CT scanning protocols and the Web site's core educational material.

Data Collection↗
PubMed2002

Multi-detector row and volume-rendered CT of the normal and accessory flow pathways of the thoracic systemic and pulmonary veins.

Multi-detector row computed tomography (CT) and volume rendering can be used as an interpretive aid to present the systemic and pulmonary venous anatomy of the thorax. Both of these venous systems are routinely imaged in clinical practice and are important in interpretation of diagnostic images in health and disease. Multi-detector row CT and three-dimensional volume rendering provide high-quality near-isotropic data (ie, the longitudinal resolution approximates the in-plane resolution). The data sets allow tailored postprocessing to produce images optimized for these vessels, which are often not fully appreciated at planar axial imaging alone. Venous structures of the thorax that can be demonstrated with multi-detector row CT and volume rendering include the jugular veins; the subclavian and brachiocephalic veins; the internal and lateral thoracic veins; the superior and inferior venae cavae; the coronary sinus, the cardiac and pericardiophrenic veins, and vein grafts; the azygos, hemiazygos, and accessory hemiazygos veins; the intercostal veins; the pulmonary veins; and other thoracic veins.

Azygos Vein↗
PubMed2002

Multidetector row CT: principles and clinical applications.

Multidetector row CT (MDCT) is the latest advancement in CT technology. The use of multiple detector rows allows faster scanning and thinner collimation. These improvements allow routine scans to be performed faster with higher z-axis resolution. New applications can also be developed using this new technology. To fully appreciate the potential of these new MDCT scanners, it is important for the radiologist to be familiar with the scanner design and capabilities. This article reviews the basic principles of MDCT scanners. Scanner/detector design, beam collimation/slice thickness, radiation dose, data manipulation, and display are discussed.

Angiography↗
PubMed2002

Three-dimensional CT angiography with multidetector CT data: study optimization, protocol design, and clinical applications in the abdomen.

The quality and flexibility of abdominal CT angiograms have been well served by advances in multidetector technology and volume rendering techniques, which allow real-time, interactive modification of high-quality data sets. We have applied this approach to many of the established and developing roles of CT and we discuss and illustrate protocol design and application.

Angiography↗
PubMedDate not supplied

Predicting resectability of periampullary cancer with three-dimensional computed tomography.

The radiographic assessment of extent of tumor burden and local vascular invasion appears to be enhanced with three-dimensional computed tomography (3D-CT). The purpose of this study was to evaluate the impact of preoperative 3D-CT in determining the resectability of patients with periampullary tumors. Intraoperative findings from exploratory laparotomy were gathered prospectively from 140 patients who were thought to have periampullary tumors and were deemed resectable after undergoing preoperative 3D-CT imaging. CT findings were compared to intraoperative findings, and the accuracy of 3D-CT in predicting tumor resectability and, ultimately, the likelihood of obtaining a margin-negative resection were assessed. Of the 140 patients who were thought to have resectable periampullary tumors after preoperative 3D-CT, 115 (82%) were subsequently determined to have periampullary cancer. The remaining 25 patients had benign disease. Among the patients with periampullary cancer, the extent of local tumor burden involving the pancreas and peripancreatic tissues was accurately depicted by 3D-CT in 93% of the patients. 3D-CT was 95% accurate in determining cancer invasion of the superior mesenteric vessels. Preoperative 3D-CT accurately predicted periampullary cancer resectability and a margin-negative resection in 98% and 86% of patients, respectively. For patients with pancreatic adenocarcinoma (n=85), preoperative 3D-CT resulted in a resectability rate and a margin-negative resection rate of 79% and 73%, respectively. The ability of 3D-CT to predict a margin-negative resection for periampullary cancer, including pancreatic adenocarcinoma, relies on its enhanced assessment of the extent of local tumor burden and involvement of the mesenteric vascular anatomy.

Adenocarcinoma↗
PubMedDate not supplied

Diagnostic laparoscopy for periampullary and pancreatic cancer: what is the true benefit?

The role of diagnostic laparoscopy in patients with periampullary and pancreatic malignancies is controversial. A retrospective review was performed including all patients (n = 188) with a periampullary or pancreatic malignancy who underwent both CT and laparotomy at our institution between January 1997 and December 1999. The overall resectability rate for all periampullary cancers was 67.3% (115 of 171 patients). This compared favorably with the resectability rate for cancers of the pancreatic body and tail (3 of 17 patients, 17.6%; P < 0.01 vs. periampullary cancers). Fifty percent of patients with periampullary cancers were unresectable because of metastatic disease, whereas metastatic disease precluded resection in 64.3% of patients with cancers of the pancreatic body and tail. After patients undergoing operative palliation were eliminated, a nontherapeutic laparotomy would have been precluded by the use of diagnostic laparoscopy in only 2.3% of patients with periampullary cancers (4 of 171 patients). In contrast, 6 (35.3%) of 17 patients with cancers of the pancreatic body and tail underwent a nontherapeutic laparotomy (P < 0.01 vs. periampullary cancers). One hundred fifty-eight (84%) of the 188 CT reports reviewed could be definitively categorized as either "likely to be resectable" or "likely to be unresectable." The remaining 16% were equivocal. Of the 107 patients categorized as likely to be resectable, 89 were actually resected (83.2%). In contrast, only 10 of the 51 patients categorized as likely to be unresectable could be resected (19.6%).

Aged↗