Telah dilakukan penelitian untuk mengetahui kualitas berkas sinar-X menggunakan half value layer (HVL) filter aluminium pada pesawat sinar-X stationary di Akademi Teknik Radiodiagnostik dan Radioterapi (ATRO) Bali. Penelitian ini bertujuan untuk mengetahui kualitas berkas sinar-X pada pesawat sinar-X stationary di ATRO Bali dengan melihat besarnya nilai HVL yang dihasilkan. Alat bantu yang digunakan berupa filter aluminium dengan tebal 0,5, 1,0, dan 2,0 mm, yang divariasi pada setiap besarnya arus yang digunakan, tegangan tabung konstan sebesar 80 kV, arus tabung 100, 125, 160, dan 200 mA, waktu eksposi sebesar 0,1 detik dan multimeter sinar-X. Untuk mengetahui besar nilai HVL digunakan uji regresi linier menggunakan SPSS. Pada masing-masing arus tabung yang digunakan diperoleh nilai HVL rata-rata 2,77 mmAl. Hasil uji-t menunjukkan bahwa nilai HVL tersebut kurang sesuai dengan standar KMK nomor 1250 tahun 2009 yaitu dalam rentang ? 2,3 mmAl sampai < 2,5 mmAl.

ABSTRACT Background: Perfusion MRI such as Dynamic Contrast Enhancement (DCE) sequences are able to provide detailed structural and metabolic information about tumor tissue, so the diagnostic imaging results can approach histologic diagnosis non-invasively. The purpose of this study was to analyze the relationship between the Time intensity curve (TIC) and the characteristics of soft tissue tumors in the extremities, and also to determine the sensitivity and specificity values. Methods: This research is a descriptive quantitative study using retrospective data. The samples of this study were all patients with soft tissue tumors of the extremities who underwent MRI examination of the extremities at the RIR Installation of Prof. RSUP. Dr. IGNG Ngoerah Denpasar and histopathological examinations were implemented during the period of June 2021-July 2022. Types I-II were associated with benign tumors. Meanwhile, the type of III-V as malignant tumors were compared with the histopathological characteristics of soft tissue tumors. Results: From 30 samples, it was found the result of the spearman rank test was about the relationship between TIC and soft tissue tumor characteristics. It was shown that the p value was 0.014 (p<0.05), and the result of diagnostics test with a 2x2 table obtained a sensitivity value of 89.47% and a specificity of 9.09% Conclusion: Time intensity curve on DCE MRI is able to distinguish the characteristics of soft tissue tumors of the extremities, especially malignancies.

Introduction: According to WHO the world's leading cause of death was tuberculosis. Diagnosis of tuberculosis can be done by examining the chest X-ray to see the organs in the chest. This study aims to determine whether there is a difference in grayscale values and histogram on thorax computed radiography images of tuberculosis (TBC) patients. Method: This research was quasi experimental with post-test only control group design method. The sample in this study were 30 patients who had chest X-ray examination. The Sample were divided into 2 groups, namely the control group (15 patients with normal thorax images) and the intervention group (15 patients with tuberculosis thorax images). Grayscale and histogram analysis were performed on Region of Interest (ROI) in the apex region of lung and superior lobe of the lung containing gloomy spots on the thorax image, assisted with a 16-bit MATLAB program, and later statistically analysed using SPSS 2.3 program. Results: Non-paired T-test results concludes that there is a statistical difference of grayscale value between TB thorax image and normal thorax image, since the non-paired T-test reveals p value of less than <0,001 (p <0,05). Conclusion:The grayscale data was then converted to histograms, which showed that the tubular thorax image histograms were leaning to the right (high grayscale value) and the normal thorax image histograms tend to skew to left side (low grayscale value). The mean value of grayscale of tuberculosis patients thorax images using 16 bit is 36896,89 while the mean value of normal thorax levels at 15036,51.

The use of polymer as conductor in medical ultrasonography is very crucial to establish patient diagnosis and to prevent administration of improper treatment. Rapid development in science and technology encourages people to create more innovations that are readily usable. However, these innovations sometimes put health and environmental aspects aside that in turn become disadvantageous to health and may lead to environmental pollution. This research proposes the use of carrageenan biopolymer as a safe alternative for people’s health and the environment. It aims to prove differences in resulting phantom CIRS images taken with the help of carrageenan gel and standard gel based on Carbomer 940 as acoustic coupling agents (ACA) for ultrasonography (USG). It is an experimental research that uses true experiment technique with posttest only control group design. Results from T-test analysis show significance value of p>0.05, meaning there is no significant difference between the use of carrageenan gel and ACA gel (Carbomer 940). This result proves that carrageenan gel can be used as an acoustic coupling agent for ultrasonography. Results from imaging tests also reveal that there is no difference between the use of carrageenan gel and that of a manufacturer gel based on Carbomer 940 available in Indonesia, in terms of visualization of phantom CIRS images.

ABSTRACT   Background: Breast cancer is the most common case in Indonesia. One of the modalities for detecting breast cancer is MRI. The DWI sequence is one of the sequences used in MRI Breast. In breast DWI, the use of effective fat suppression techniques is essential. Several studies have stated that the most common fat suppression techniques used in breast MRI are STIR and SPAIR, because they are considered capable of optimally displaying lesion images. Signal intensity and image quality depend on fat suppression technique, the choice of method used for breast DWI should be considered, because it can affect lesion identification and ROI for calculating ADC used to differentiate benign and malignant lesions. Methods: This study is a literature review study with descriptive qualitative research type. Collect and analyze library sources from several published data. After being reduced based on the topic, 6 main relevant articles were found to be used as a basis to review, describing and discussing the results according to the topic and then criticizing according to the author's view and determining conclusions. Results: The results of this study showed that DWI-STIR and DWI-SPAIR on MRI Breast imaging have use in suppressing fat and can show the difference between benign and malignant lesions of the breast. With the difference in DWI-SPAIR, the results of SNR and CNR are higher, and DWI-STIR, the results are more homogeneous. Conclusion: DWI-STIR and DWI-SPAIR can suppress fat and differentiate lesions well. DWI-SPAIR is better for lesion visibility on high-tesla MRI, and DWI-STIR is better for low-tesla MRI.