The Effects of 64-MDCT on Liver Detection - Research Proposal Example

The paper discusses what CT operators, medical physicists, and radiologists should get in the use of 4-MDCT. The use of CT in the detection of the liver has been there for several years. Parameters that control radiation calculation are many. For example, the default solutions, and iteration parameters, are used in most problems.

The process of detection using the 64-MDCT requires patients that have lesions that are surgically proven. These patients then will have to undergo the triple-phase 64-MDCT process. The patients will be observed independently. Later, a thorough evaluation of the MR and CT imaging process is required. This is done on a lesion-by-lesion point. According to Hayat (2009), the reproductively, negative, and positive values and sensitivity are then evaluated. The diagnostic accuracy of the method is assessed against the alternative free-response characteristics analysis.

Objectives

The main objective of the project is to develop a simple methodology. This is where users can establish exposure factors that can be practical to patients. This includes the patients with different body weights. The method is used instead of, relying on the current approach of using default values based upon the standard-sized patient.

Methodology

They developed a simple mAs prediction equation to optimize radiation dose for all patient weight categories. The results showed that patient weight can be a good predictor of the required dose. In addition, an agreement can be reached, at a certain noise level, to be acceptable. Moreover, the value could be increased for larger patients.

The radiation dose reduction requires the lowering of kV or mA settings, Schoenberg (2007). This will, however, increase the noise when all other settings are kept constant. The mA settings are adjusted continuously until the best results are achieved. The reduction of tube voltage is done. This is a strategy of reducing the dose as the image quality is improved. The attenuation of calcium and iodine levels is increased at lower kV. This leads to higher contrasts. In addition, the window width is adjusted. This helps in accommodating the increased contrast enhancement.

The application of CT protocol is hindered by the use of excessive radiation and large amounts of contrast medium. However, this technology provides for scanning of the chest. Kalra (2008) notes, the ECG triggers in less than a second with minimum radiation dose. In addition, the ECG triggered a fast CT scanning. This gives a significant role in screening the whole vasculature of patients.

The reduction of dose in protocols for boy CT is also significant. This reduction of dose to patients can be done by performing enhanced phases where needed. The reduction of radiation dose requires a combination of adequate bolus timing, fast scanning, and administration of high Iodine rate. This optimizes the arterial phase MDCT (Rodés, 2007).

Conclusion

To conclude, the 64-MDCT has improved the transverse images and improved the confidence of the reader in the detection of HCC. This is by not increasing the diagnostic accuracy, sensitivity and, positive predictive value. However, the development is with the cost of a longer period of interpretation. MDCT use of ionizing radiation that induces the risk of secondary cancer is a drawback.