| Popis: |
The use and application of the three-dimensional (3-D) reconstructions generated from suitable files digital imaging and communications in medicine (DICOM) of computed tomography (CT) or magnetic resonances (MR) have been expanding recently. Such reconstructions allow physicians to observe anatomic cavities and structures within our body with an incredible amount of details in addition to displaying the textures of variety of tissues. The applications of such reconstructions have varied from simple illustrations in exams up to the help in the diagnosis and preoperative planning in several medical specialties. As an example of such application we have virtual colonoscopy performed by GI colleagues and also CAD by cardiologists. In our specialty there have been some attempts to carry out virtual endoscopies and laryngoscopies. However, such application has been practically abandoned due to its complexity and need for computers with high power of graphic processing. However, with the evolution of proper computers and programs for reading and reconstruction of the DICOM files, currently some authors have recovered the use of such 3-D reconstructions for evaluation and preoperative planning specially related to head and neck surgeries and to recess and frontal sinus. Such 3-D reconstructions may offer potentially more usable information than those obtained with 2-D views in the axial, coronal, and sagittal plans. These images obtained in the three different planes, axial, coronal, and sagittal, are usable in the analysis of the recess and frontal sinus. However, these two-dimensional images are of more difficult comprehension for surgeons. We live in a three-dimensional world and despite a large part of the endoscopes still do not allow the performance of 3-D stereoscopic surgeries; the images obtained in the traditional endoscopic surgeries allow us the creation of 3-D relationships in our mind. |
