Research has been carried out on the Potential Risk of Cancer in Body Organs Due to Abdomen CT Scan Radiation. The use of a CT-Scan tool that emits radiation has the potential to have quite a serious impact. An abdominal CT-Scan is one part of the examination that is often done because in that section many organs are very vital. The organs found in the abdomen include the liver, spleen, stomach, intestines, kidneys, gonads, pancreas, bladder, and ureters. The study used data on abdominal CT-Scan patients at Sanglah Hospital Denpasar, in the age range from 41 years to 56 years without distinguishing gender. From the CT-Scan data, the CTDIVol and DLP values ??of each patient can be taken. Furthermore, it is analyzed to determine the patient's effective dose so that the percentage of cancer risk in each of these organs can be known. The results showed that the potential risk of cancer for critical organs such as the bladder, stomach, and gonads, was 0.218 %, 0.262 %, and 0.390 % respectively. The most at risk for potential cancer occurs in the gonads.

The utilization of radiation for health in Indonesia shows a significant increase, it can be seen from the increasing number of modalities of ionizing radiation sources used and the types of medical actions carried out with the help of radiation. The use of radiation must be monitored to ensure the protection and safety of workers, patients, and the community. In Government Regulation No. 33/2007 which regulates radiation safety for workers, the community and the environment, it can be seen that one of the protection requirements that must be met in the utilization of radiation is the optimization of radiation protection and safety. In diagnostic and interventional radiology, optimization can be interpreted as an attempt to make the dose received by patients as low as possible while maintaining optimum image quality. In this study, the effort to optimize patient dose is carried out on general radiography with the application of Si-INTAN (National Patient Dose Data Information System).

One source of radiation is X-ray aircraft, which utilization must pay attention to safety aspects. Room design is the first step that must be done before the operation of X-ray aircraft. Radiology Unit Kasih Ibu Kedonganan Hospital operates an X-ray aircraft with specifications of 250 kV-85 mA, needs to be tested for radiation exposure which is an integral part of the verification of radiation protection. Test for radiation exposure at least once a year. The purpose of the installation room design is to ensure that workers or the general public around the plant receive radiation exposure that is smaller than the applicable dose limit value (DLV), by the radiation safety provisions that refer to the Decree. BAPETEN No. 7 of 2009 concerning Radiation Safety in the use of radiographic equipment. This study will test exposure to room wall shields associated with radiation workers and the general public. The results showed that all walls A, B, C, D, and E could still completely weaken the rate of X-ray radiation. The highest radiation dose detected on wall B is the primary wall for the Buky stand examination.

Background: Tinnitus is the perception of sound heard by a person without an external stimulus. About 10-14.5% of the world's population experience tinnitus, with the most common age group being 40-60. The management of tinnitus is still a challenge for researchers. Until now, there has been no effective management of tinnitus. The last therapy available is to make artificial sounds that imitate the tinnitus sound so that it can mask the actual tinnitus sound. In addition, music therapy is expected to reduce the stress level of tinnitus patients. Methods: This research is a follow-up study from previous research with 26 subjects. After getting the frequency and amplitude of tinnitus, a sound stimulus is made by combining tone variations and good generators obtained from audiometric masking. Tone variations are made using a basic tone that matches the patient's tinnitus frequency. After that, the patient will assess the results of the merger. Then all the participants will listen to dan evaluate the mixing song. Results: Of all subjective tinnitus sound generators, 3-5% have frequencies below 20 Hz and above 20,000 Hz. Songs made by recording in a soundproof room also have a frequency of 20 Hz and above 20,000 Hz, about 5 – 7%, where the song has an unnecessary frequency. The subjective tinnitus sound generator with the created song has an amplitude of < 85dB so that it can be adjusted with the volume control on the speaker. Conclusion: Tinnitus songs were made with the addition of Piano and Violin and Flute music, and Guitar, Bass and Balinese gamelan had a frequency of 20 – 20,000 Hz with an amplitude of < 85 dB, which can be adjusted with the volume so that it is safe and comfortable for tinnitus sufferers.

Research has been conducted variations in sintering temperature between 900 ºC – 950 ºC for 12 hours on the synthesis phase of Gd1Ba2Cu3O7-d substituted La and Sr with stoichiometric composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. This study is intended to find out at what temperature the compound Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d  can be formed to the maximum. Samples with composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d made from the raw materials Gd2O3, La2O3, BaO, Sr2O3 and CuO. Samples are synthesized using solid-state reaction method by wet mixing with nitric acid (HNO3) as solvent. The sample is sintering in the form of pellets in the furnace without annealing of oxygen gas. The synthesis results were characterized by X-Ray Diffraction (XRD) and analyzed with the Match-3 Program. By using the Entry number 96-153-9606, the results of it analysis showed that sintering temperature had an impact on the formation of phase compounds Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. Show that the volume fraction is increases with increasing of the sintering temperature, especially from temperatures of 930 ºC to 950 ºC. The highest volume fraction of 75,4263 % was obtained in samples that sintering at 950 ºC. Refinement results with Rietveld analysis method showed phase Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d formed is in orthorhombic symmetry. The volume of cell units is likely to increase as the temperature increases.