Gary Gelfand

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OBJECTIVES To determine the grades of recommendations and levels of evidence available if the formal practice of evidence-based medicine is applied to general thoracic surgery. METHODS Three general thoracic surgeons, by consensus, developed a sample of 10 clinically important questions. The first 3 steps of evidence-based medicine (creation of answerable(More)
Modern multislice computed tomography (CT) scanners produce isotropic CT images with a thickness of 0.6 mm. These CT images offer detailed information of lung cavities, which could be used for better surgical planning of treating lung cancer. The major challenge for developing a surgical planning system is the automatic segmentation of lung lobes by(More)
BACKGROUND The purpose of this study is to describe the demographics, training and practice characteristics of physicians performing thoracic surgery across Canada to better assess workforce needs. METHODS We developed a questionnaire using a modified Delphi process to generate questionnaire items. The questionnaire was administered to all Canadian(More)
Following esophagectomy, restoration of swallowing by gastric tube interposition with cervical esophagogastric anastomosis reduces morbidity and mortality associated with intrathoracic anastomoses at the expense of an increased incidence of both anastomotic leak and stricture formation. A retrospective study of 165 patients with either squamous cell(More)
The choice of the optimal surgical approach for repairing paraesophaeal hernias (PEH) is debated. Our objective is to evaluate the short-term outcomes of primary laparoscopic and open repairs of PEH performed in the Calgary Health Region. A retrospective review of all patients undergoing repair of PEH between October 1999 and February 2005 was performed.(More)
We reviewed our experience from 1979 to 1990 with 160 cases of transhiatal esophagectomy for carcinoma of the lower esophagus and cardia to evaluate trends in patient selection, management, and outcome. Patients treated in the past 6 years (n = 110) and those treated before 1985 (n = 50) were similar in terms of age and sex distribution, medical history,(More)
BACKGROUND Antireflux therapy, including surgery, has been advocated for asthma patients with gastroesophageal reflux (GER). A recent review of medical antireflux therapy reported improvements in asthma symptoms and medication requirements but no improvement in pulmonary function. The purpose of this article is to review the available literature on the(More)
The objective was to develop, pretest and validate a disease-specific quality of life questionnaire for potentially curable patients with esophageal carcinoma, for use with the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) in order to assess the quality of life associated with the various treatment(More)
The major hurdle for three-dimensional display of lung lobes is the automatic recognition of lobar fissures, boundaries of lung lobes. Lobar fissures are difficult to recognize due to their variable shape and appearance, along with the low contrast and high noise inherent in computed tomographic (CT) images. An algorithm for recognizing the major fissures(More)
Study has shown that three-dimensional (3D) visualization of lung cavities has distinct advantages over traditional computed tomographic (CT) images for surgical planning. A crucial step for achieving 3D visualization of lung cavities is the segmentation of lung lobes by identifying lobar fissures in volumetric CT images. Current segmentation algorithms for(More)