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| Author | Francesca Pace Bonello |
| Abstract | The aim of this study was to determine whether CT sinus scans can be performed by using direct, conventional CT or reconstructed spiral CT images and still obtain the same image quality. Although the coronal plane is the preferred orientation in CT imaging of the sinuses, presently one can observe two protocols that are being used to arrive to this result. At St. Luke's Hospital patients are submitted to direct coronal imaging by using a conventional CT scanner while at Saint James' Hospital, spiral CT is used and patients are imaged in the axial plane and coronal images are then obtained after reconstruction. The comparison between modalities was performed by using a checklist which consisted of anatomical structures necessary to be observed in a high quality sinus CT scan image. A set of images conveniently selected from both methods of imaging was shown to a radiologist who had to identify the structures from the images and give a score on their appearance. The results demonstrated that there was no significant difference in image quality between images of the sinuses using direct coronal images by conventional CT and coronal images of the sinuses reconstructed from axial images using a spiral CT. This study confirmed that it is possible for a patient to use either CT technique without compromising the image quality and therefore the diagnosis of the investigation. Therefore, reconstructed images can be proposed as an alternative to direct coronal images, especially when patients cannot maintain the prone position in direct coronal scans as the same image quality is reproduced. |
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| Key words | Radiography, Thesis, CT Scans, Sinus |