GCSE Physics - Using Radiation in Medicine #37

The video discusses the use of radiation in medicine, focusing on radiotherapy for cancer treatment and medical traces for diagnosis. It explains how ionising radiation can damage cells and DNA, potentially causing cancer, but also how it can be used to destroy cancer cells. Radiotherapy can be delivered externally or internally, each with side effects. Medical traces involve using radioactive isotopes to diagnose organ function. The video emphasizes the importance of weighing the risks and benefits of radiation, highlighting that while it can be harmful, it is often worth the risk for diagnosis and treatment.

What is the primary concern with ionising radiation in relation to cells?

• It can cause cells to grow faster.

• It can mutate DNA, potentially leading to cancer.

• It can make cells more resistant to diseases.

• It can improve cell regeneration.

How are gamma rays typically used in external radiotherapy?

• They are used to cool down the cancer cells.

• They are injected directly into the tumor.

• They are used to heat the cancer cells.

• They are targeted at the cancer site from multiple angles.

What is a common side effect of both external and internal radiotherapy?

• Increased energy levels

• Enhanced immune response

• Damage to healthy cells

• Improved appetite

Why are isotopes with short half-lives preferred in medical traces?

• They are more cost-effective.

• They are easier to produce.

• They emit radiation for a shorter period, reducing harm.

• They provide more detailed images.

What is the main benefit of using medical traces in diagnostics?

• They increase the body's resistance to radiation.

• They eliminate the need for other diagnostic tests.

• They help in tracking the movement of substances in the body.

• They can cure diseases instantly.