Lumbar Spine Densitometry

Lumbar spine densitometry.

failure of antigen production is more likely to be due to genetic change associated with incomplete penetrance than to genetic loss. An alternative or additional possibility cannot, however, be excluded-that exuberant cell division causes dilution of a particulate cytoplasmic factor responsible for the formation of the antigen. Loss of organ-specific antigens could influence tumour metastasis b...

Selective Densitometry of the Lumbar Spine

Introduction: Bone mineral density (BMD) has been identified as a major factor in spine construct strength, with failures resulting in pedicle screw loosening and pullout [2,3]. Computed tomography (CT) scans have been shown to effectively measure BMD [1,4]. Previous research has utilized this linear correlation of CT Hounsfield Units (HU) to BMD in order to determine BMD as a function of anato...

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Beam Collimation during Lumbar Spine Radiography: A Retrospective Study

Introduction: Collimating the primary beam to the area of diagnostic interest (ADI) has been strongly recommended as an effective method to reduce patient’s radiation dose and to improve image quality during radiology practice. Lack or inadequate collimation results in excessive radiation dose to patients and deterioration image quality.Objective: To assess the quality of beam collimation dur...

Artificial Intervertebral Disc: Lumbar Spine

Professional Original Effective Date: August 9, 2005 Institutional Original Effective Date: August 9, 2005 Revision Date(s): June 14, 2006; January 1, 2007; July 24, 2007; September 25 2007; February 22, 2010; March 10, 2011; March 8, 2013 Revision Date(s): June 14, 2006; January 1, 2007; July 24, 2007; September 25 2007; February 22, 2010; March 1