Protocols Survery for Vascular Technique In MRI Centers in Khartoum State

Abstract

The objective of this study is to survey the protocol for vascular system technique in MRI centers in Khartoum State. The study has been done in two MRI Centres in Khartoum State. They are: 1- Khartoum MRI Centre (Doaa centre). The magnetic power is 1 Tesla. 2- Khartoum Advanced Diagnostic Centre (KADC). The magnetic power is 1.5 Tesla. The study has been done during the period from 1/5/2005 up to 30/8/2005. During this period of time there were 40 patients refered to these centres for vascular system examinations (only for cerebral vessels). Then comparison between these two centers in the protocols which are used to obtain the vascular system images, the image quality and diagnosis of disease. By using the questionnaire and analysis the data statistically the following results are obtained. There is differences in the protocols which are applied in the two centers, and in their magnetic powers. These differences lead to the following. 1- In Khartoum Advanced Diagnostic Centre (KADC) on excellent image quality is obtained due to the higher magnetic power which is 1.5 Tesla. 2- In Khartoum MRI Centre (Doaa Centre) less image quality is obtained due to the lower magnetic power of the machine which is 1 Tesla. There is direct proportionality between the image quality and the magnetic power. If the magnetic power increased, the quality of the image increases and vise verse. There are different protocols used in the two centers for MR vascular system examination. - In “KADC” two dimension time-of-flight (2 DTOF) and two dimension phase contrast (2D phase contrast) are used. - In Doaa Centre, three dimension time-of-flight is used. Also, there are differences between the parameters, which are applied in the studies done in the two centers, such as time of repetition (TR), time of echo (TE), slice thickness and the scan time.