Why is Computed Tomography Protocol Better Than Conventional Radiography?

A low-dose, limited computed tomography protocol has been verified to be accurate for examination of sacroiliac joints. Moreover, the accuracy of this examination is comparable to that of a comprehensive CT series. Therefore, it is a useful alternative to ordinary radiography for detection of sacroiliitis.

There are several advantages of using a computed tomography protocol for examination. Firstly, the duration or the time consumed during the examination is extremely less. Moreover, there is also a significant decrease in exposure to radiations as compared to traditional radiology. In addition, a considerable reduction has been observed in exposure to radiations in comparison of the complete CT series.

The technique has been developed through study of anatomic specimens wherein the articulate surfaces are covered using a barium film. This allows clear demonstration of synovial surfaces as well as selection of the most suitable level of a section. Therefore, different views enabled the definition of different sections. The anterposterior scout view helped in defining the first sacral foramen, the third sacral foramen as well as between the first and second sacral foramina. Likewise, in superior section about one-fourth of sacroiliac joint is synovial. However, in the inferior section the complete joint is synovial.

Apart from these observations, the relative images at different strengths of current illustrated that if the strength of current is low as compared to the traditionally utilized current, diagnostic information is not lost. In general, the protocol is preferred to the imaging schedules that were conventionally utilized by the physicians in hospitals.

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