K-space functions to store digital data generated from time to time during scanning, then the data will be converted into image information via Fourier transformation. Radial trajectory at the Siemens vendor is called BLADE, which is a k-space filling method that starts from the central k-space axis and then rotates so that the data block is obtained. Cartesian trajectory is a method for filling k-space which is done linearly from top to bottom or from bottom to top. The aim of this research is to analyze the effect of the k-space filling method using the radial trajectory (BLADE) and Cartesian trajectory methods on the quality of axial MRI Brain T2WI sequence images in Space Occupying Lession (SOL) cases. This study uses a quantitative research method with an experimental study approach. The population and sample of the study were 10 patients with SOL clinical MRI brain examinations, and each sample underwent variations in k-space filling using the radial trajectory (BLADE) and Cartesian trajectory methods on axial T2WI sequences. The data was processed using radiant DICOM and then analyzed using the normality test and the Wilcoxon test on SPSS 25 software. The results of the study show a significance value (p-value) of 0.000 < 0.05, so it can be concluded that Ha is accepted and H0 is rejected, which means there is a difference in the Contrast to Noise Ratio (CNR) in the axial T2WI sequence MRI Brain examination using variations of k -space filling cartesian trajectory and radial trajectory (BLADE) techniques. The radial trajectory (BLADE) technique in the MRI Brain T2WI axial sequence examination is considered capable of producing a more optimal CNR compared to the Cartesian trajectory technique, seen from the mean rank value for the radial trajectory (BLADE) technique it’s 32.88, while for the Cartesian trajectory technique it’s 18. 7.

Background: CT (Computed Tomography) Scan modality is very useful for obtaining a diagnosis of tumors in the abdominal cavity. The procedure carried out in abdominal MSCT uses contrast media. The contrast media commonly used in abdominal MSCT examinations can be intravenous, oral and anal. Kupang Hospital uses contrast media intravenously, orally and anally. The aim of this study was to determine the procedure for examining abdominal MSCT with clinical lower abdominal tumors using a multiphase technique using intravenous contrast media in the form of iodine water soluble with a dual syringe injector and NaCl liquid and orally with a volume of 750 ml of mineral water mixed with 5 ml of contrast media to drink before The examination then takes place via anal examination in the form of negative water contrast media mixed with iodine water soluble contrast media with a 50 cc syringe and also to find out the reasons for using contrast media intravenously, orally and anally in abdominal MSCT examinations with clinical lower abdominal tumors.
Method: This research design is qualitative with a case study approach. The subjects of this study were patients with clinical lower abdominal tumors. Research respondents were 2 Radiographers, 1 Radiology Specialist. The data collection method was taken by observation, Focus Group Discussion (FGD) and documentation, then data analysis and conclusion drawing were carried out.
Results: The results of this study are about the abdominal MSCT examination procedure and the reasons for using contrast media injection techniques with clinical lower abdominal tumors in the Kupang Hospital Radiology Installation.
Conclusion: The use of the technique of intravenous administration of contrast media aims to anatomically visualize vascularization, distinguish blood vessels from masses, determine the level of vascular displacement or invasion by tumors and by inserting contrast media orally it aims to provide opacification of the intestine and assist in diagnosing existing abnormalities in the intestine such as ulceration, perforation, obstruction, and space occupying lesions then through anal purposes to fill the large intestine, able to provide an overview of colonic distension and colon cancer. The use of contrast media injection techniques via intravenous, oral and anal is because the patient can make preparations as expected .