To clear the sinuses and frontal sinuses, you can try using a saline nasal spray or a neti pot to rinse out the nasal passages and reduce congestion. Steam inhalation can also help to open up the sinuses and relieve pressure. Additionally, using a warm compress over the sinuses or gently massaging the area can help to promote drainage and alleviate discomfort. If these methods do not provide relief, it is important to consult a healthcare professional for further evaluation and treatment options. **

Venous sinuses are large, thin-walled blood vessels found within the dura mater, the tough outermost membrane surrounding the brain. They are responsible for draining deoxygenated blood and cerebrospinal fluid from the brain and returning it to the systemic circulation. Venous sinuses have a unique structure, with no traditional endothelial lining, and they are surrounded by layers of dura mater. These sinuses play a crucial role in maintaining the proper circulation and drainage of fluids within the brain. **

The radiation exposure in the nasal sinuses is not typically very high or dangerous. The nasal sinuses are located relatively close to the surface of the body, so they receive lower levels of radiation compared to deeper tissues. However, any exposure to radiation should be minimized as much as possible to reduce potential risks. It is important to follow safety protocols and guidelines to limit radiation exposure during medical procedures or occupational activities that involve radiation. **

The caricature of the summit conference in Helsinki shows the leaders of the United States and Russia, Donald Trump and Vladimir Putin, sitting at a table with Trump holding a puppet string attached to Putin. This caricature is a satirical representation of the perception that Trump is under the control or influence of Putin, suggesting that Putin is pulling the strings and manipulating Trump. The image reflects the controversy and speculation surrounding the relationship between the two leaders and the potential influence of Russia on the United States. **

A symposium is a formal gathering or meeting where experts in a particular field come together to discuss and exchange ideas on a specific topic. It is often organized as a series of presentations, panel discussions, and Q&A sessions, allowing participants to share their knowledge and insights with each other. Symposia are commonly held in academic and professional settings, providing a platform for networking, collaboration, and learning within a specific discipline or industry. **

"Der Kongress tanzt" is a German phrase that translates to "The Congress Dances" in English. The phrase originated from the Congress of Vienna in 1814-1815, where European diplomats and leaders gathered to reorganize Europe after the Napoleonic Wars. The phrase is a metaphor for the diplomatic and political maneuvering that took place during the Congress, likening it to a dance where participants carefully navigated their relationships and alliances. It reflects the complex and intricate nature of international diplomacy and negotiations during this historic event. **

A convention is a formal agreement or a set of accepted norms and practices that govern behavior in a particular context or industry. It is a customary way of doing things that is widely recognized and followed by a group of people. Conventions help to establish consistency, order, and predictability in social interactions or professional settings. They can vary across different cultures, societies, or fields of study. **

The G20 summit is a meeting of the leaders of the world's 20 largest economies, representing both developed and developing countries. The summit provides a platform for these leaders to discuss and coordinate on global economic issues, such as trade, finance, and development. It is an opportunity for countries to work together to address common challenges and promote global economic stability and growth. The G20 summit also serves as a forum for leaders to address pressing international issues, such as climate change, terrorism, and global health crises. **