AQA A-Level Physics (7408) · AQA 7408
3.10 Medical Physics
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Medical Physics
- Explain why patients and radiographers are at risk of harm from X-rays, and describe two p… (5 marks, Explain)
- Describe how the loudness and frequency of a sound are represented in the vibrations of th… (5 marks, Describe and Explain)
- Explain why a radionuclide used in medical imaging must have a short half-life and must em… (5 marks, Explain)
- A patient is given a radionuclide tracer that accumulates in tumour cells. Describe what h… (5 marks, Describe and Explain)
- A patient swallows a barium meal before an X-ray examination of their digestive system. Ex… (5 marks, Explain)
- Describe how a digital X-ray image of a patient's chest is produced, from the X-ray tube t… (5 marks, Describe)
- Explain why X-rays are used to produce images of bones inside the body, rather than of sof… (5 marks, Explain)
- Explain how an MRI scanner produces an image of soft tissues inside the body, and state on… (5 marks, Explain)
- Explain why ultrasound can be used to distinguish between two different soft tissues that … (5 marks, Explain)
- Describe how ultrasound is used to produce an image of structures inside the body. (5 marks, Describe)
- Explain how an ultrasound scanner produces an image of the inside of a patient's body from… (5 marks, Explain)
- Explain why ultrasound is used to image a developing fetus rather than X-rays. (5 marks, Explain)
- Describe how body temperature is measured using a clinical thermometer and explain why mai… (5 marks, Describe and Explain)
- Explain why blood pressure is measured at two different values and describe what abnormall… (5 marks, Explain)
- Explain how a spirometer is used to measure lung function and describe what the measuremen… (5 marks, Explain)
- Describe how a doctor can use an electrocardiogram (ECG) to assess the condition of a pati… (5 marks, Describe)
- Explain why it is important that a pulse oximeter can measure both heart rate and blood ox… (5 marks, Explain)
- Explain why sounds above 20 000 Hz are not heard by most adults, and why older adults ofte… (5 marks, Explain)
- Explain how the structures of the ear convert sound waves in air into electrical signals s… (5 marks, Explain)
- Explain how the structure of the eye enables it to detect light and send information to th… (5 marks, Explain)