MBP20009 - Medical Imaging Systems - Medical Science Assignment Help

Assignment Task

Student learning outcomes for this practical

• Demonstrate an understanding of how an ultrasound image is formed.

• Differentiate between the use of grey-scale sonography and Doppler ultrasound.

• Identify the differences between plain film radiography and computerised tomography

• Demonstrate an understanding of radiological density and identify this in different tissues in the thorax.

• Demonstrate an understanding of Hounsfield Units and the scale; be able to identify different tissue types based on these values.

• Understand common X-ray views and their clinical application.

• Identify the benefits, risks and contraindications when comparing plain radiography and computerised tomography.

Q 1. Before scrolling through a large set of slices within a patient’s CT, it is important to familiarise the position of your patient in a CT. The images labelled 1 and 2 above represent two abdominal CT images from an axial view. Looking at these two images, answer the following questions: A. Identify which patient is lying supine and which is lying prone. How is this identified? B. Label the left and right side of the patient?

Q 2. The image above shows ‘Case S118’, an axial view of the abdomen and had several regions annotated. These four selected areas show the calculated density of the tissues within that area and are expressed as a mean and SD value. A. What unit of measurement is used to express tissue density in CT? Using the calculated density values, name the type of tissue in each of the four areas.

Q 3. Locate and watch the videos titled ‘CT_1’ and ‘CT_2’ of the abdominal CT and answer the following questions: A. Identify the CT scan which includes the addition of a contrast agent. What material is most commonly administered for CT contrast-enhancement? B. Describe how the contrast agent changes the densities of certain structures on a CT, and why it is used clinically? C. Compare a CT image with a plain film radiograph. Describe two scenarios where a patient would be referred to get an x-ray rather than a CT, and why this is?

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