الفهرس 
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Abstract
The aim of the study is to evaluate the role of spiral (helical) computed tomography in the assessment of neck masses regarding extension, mature and their relations to the vascular structures.
We conclude from this study the following:
1- Spiral (helical) CT offers significant advantages for clinical CT examinations.
* The short total scan times made it the method of choice for many contrast-medium studies, and for pediatric and trauma examinations.
* The data set obtained from helical CT is volumetric from the start.
* The spiral technology helped very much the reduction of the total radiation dose given to the patient as we can get the in between cuts with high resolution from post examination processing.
2- Since its introduction, helical CT has dramatically changed the performance of body CT scans in the form of:
* Elimination of respiratory disintegration artifacts,
* Minimization of motion artifacts, and
* Production of overlapping images without additional radiation exposure are the most important technical advantages of helical CT.
3- For any radiologist who wants to enter new challenges area of 3-D radiology, he must be fully aware of the axial CT anatomy of the neck in its new from which is spaces and not triangles.
4- All the data obtained from 3-D reconstruction models, the virtual endoscopies, and MIP all is obtained primarily from axial CT cuts.
5- The new technologies of the spiral CT and computer post processing programs should be promptly and extensively used in the field of head & neck radiology which is considered a frustrating task for many radiologists.
6- Also, we can say that this new technique is a single examination for all applications, and this is to be considered the radiology of tomorrow.