Utility of multiplanar reconstructed (sagittally reformatted) computed tomography in the evaluation of frontal sinus outflow tract (FSOT).

James Albert, Jaganath (2008) Utility of multiplanar reconstructed (sagittally reformatted) computed tomography in the evaluation of frontal sinus outflow tract (FSOT). Masters thesis, Christian Medical College, Vellore.


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Accurate diagnosis of chronic sinusitis has remained a challenge. History, clinical examination, endoscopy and radiology need to be combined to make a complete diagnosis. Imaging also has resulted in improvement in techniques of surgery as anatomical variations have been better diagnosed. Computer Tomography of the paranasal sinuses classically has been performed with coronal 3mm slices to provide single plane of morphologic depiction of sinus anatomy for presurgical mapping and evaluation. Recent advances in computer tomography provide multiplanar 1mm reconstructed images (axial, coronal and sagittal ) of frontal sinuses and their corresponding drainage pathway. The complex and variable anatomy of the frontal recess can be difficult to appreciate with standard axial or coronal CT images of the sinus. The advent of multiplanar CT imaging with addition of sagittal reconstructions greatly improves the understanding of the frontal recess. In addition to the inherent variation in size and diameter, the presence of various accessory cells such as frontal cells and intersinus septal cells also contribute to the anatomic complexity of the frontal recess and the potential for obstruction of the frontal sinus. Persistence of anatomic causes of obstruction of the frontal recess has been reported as a major cause of failure of endoscopic sinus surgery. The purpose of this study is to determine the prevalence of frontal cells and to establish the advantages of reconstructed images over plain images in the assessment of Frontal Sinus Outflow Tract. This study concludes that multiplanar computer tomography of the paranasal sinuses greatly improves our understanding of the frontal sinus outflow tract.

Item Type: Thesis (Masters)
Uncontrolled Keywords: multiplanar reconstructed; sagittally reformatted; computed tomography; frontal sinus outflow tract; FSOT
Subjects: MEDICAL > Otolaryngology
Depositing User: Devi S
Date Deposited: 11 Jul 2017 06:47
Last Modified: 11 Jul 2017 06:47
URI: http://repository-tnmgrmu.ac.in/id/eprint/1433

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