Introduction: Among the female population, breast cancer is the most commonly diagnosed cancer in the world, and nearly half of women population with breast cancer develop metastatic disease during their lifetime. Breast cancer most often metastazises to the lungs, liver, bones, brain and lymph nodes. 18F-FDG PET/CT can detect metastases that are not visible in other imaging modalities, and with the newly discovered lesions, decision about adequate treatment option can be evaluated. Material and methods: The examination was conducted as a retrospective descriptive study in May and June of 2019 at the Clinic for Nuclear Medicine and Endocrinology of the University Clinical Center in Sarajevo. It included 100 female patients with the age structure of 33-79 years. The patient's reference diagnosis is breast cancer, with a suspected finding of metastatic activity. A comparison of the sensitivity and specificity of the breast imaging between PET/CT, CT and bone scintigraphy was performed. Results: PET/CT revealed significantly more positive findings on metastatic activity than other diagnostic imaging modalities, with Mann-Whitney test value of p = 0.01014. In the diagnosis of lungs and liver lesions, PET/CT sensitivity and specificity are 92.59% and 85.37%, respectively, while the statistical parameters for CT are 77.78% for sensitivity and 90.24% for specificity. The PET/CT sensitivity and specificity for bone lesions are 93.55% and 88.89%, respectively, compared to 78.57% and 100% for bone scintigraphy. Conclusion: Hybrid imaging technique, which integrates PET and CT imaging methods, has considerable advantages over other diagnostic methods in the detection of distant metastases, and based on obtained results, PET/CT may be method of choice in evaluation of metastatic activity in breast cancer.

Introduction: The engineers of the medical radiology in radiotherapy are key professional group directly responsible for reliable delivery of radiation therapy treatment and the implementation of radiation protection measures in practice. Therefore, their knowledge and skills in this area need to be adequate and up to date. The aim of this research is the assessment of knowledge, attitudes and practice in the field of radiation protection among the engineers of medical radiology employed in radiotherapy centers within the public healthcare system in Bosnia and Herzegovina. Material and methods: The research was conducted on a sample of 30 engineers of medical radiology using a structured questionnaire which contains demographic data and sets of 10 questions related to radiotherapy devices, radiation protection in radiotherapy, risks and incidents related to use of ionizing radiation and the role of medical radiology engineers in radiation protection system. Results: The results of the research show optimal level of knowledge in the field of radiation protection (74.66%) and optimal level of awareness of the risks associated with the use of ionizing radiation (72%). The level of knowledge and awareness is significantly higher among respondents with longer working experience and those who have completed master’s degree and postgraduate education in the field of radiation protection. The application of ionizing radiation protection measures in practice has been assessed as satisfactory (2,3). Respondents are not sufficiently involved in the work of regulatory bodies (26.7%), decisionmaking (23.3%), development of procedures (23.3%) and education of other employees in the field of radiation protection (2.7%). Conclusion: Engineers of medical radiology are not fully involved in the radiation protection system as educated and trained professionals. One of the most important professional interests of engineers of medical radiology is adequate influence on the processes in the field of radiation protection.

Experience in managing thromboembolic complications of distal blood vessels during coil embolization in the case of subarachnoid hemorrhage (SAH) is still limited. This is the presentation of the case of a 23-year-old man with a ruptured small aneurysm who experienced thromboembolic occlusion during coil embolization. Mechanical thrombectomy resulted in complete recanalization of the occluded branches without ischemic complications. This case should be used for the use of mechanical thrombectomies as an effective rescue strategy and treatment of distal arteries occlusions of the brain.

An amendment to this paper has been published and can be accessed via the original article.

An amendment to this paper has been published and can be accessed via the original article.

Gallium nitride (GaN) is the main component of modern-day high electron mobility transistor electronic devices due to its favorable electronic properties. As electronic devices become smaller with more complex architecture, the ability to deposit high-quality GaN films at low temperature is required. Herein, we report a new highly volatile Ga(III) triazenide precursor and demonstrate its ability to deposit high-quality epitaxial GaN by atomic layer deposition (ALD). This new Ga(III) triazenide precursor, the first hexacoordinated M–N bonded Ga(III) precursor used in a vapor deposition process, was easily synthesized and purified by sublimation. Thermogravimetric analysis showed single step volatilization with an onset temperature of 150 °C and negligible residual mass. Three temperature intervals with self-limiting growth were observed when depositing GaN films. In the second growth interval, the films were found to be near stoichiometric with very low levels of impurities and epitaxial orientation on 4H-SiC without an AlN seed layer. The films grown at 350 °C were found to be smooth with a sharp interface between the substrate and film. The bandgap of these films was 3.41 eV with the Fermi level at 1.90 eV, showing that the GaN films were unintentionally n-type doped. This new triazenide precursor enables ALD of GaN for semiconductor applications and provides a new Ga(III) precursor for future deposition processes.