Final answer:
A CT scan of the patient's head would start in the Radiology section, where detailed cross-sectional images are produced using X-rays. The procedure is used to diagnose conditions like tumors while taking into account the risks of radiation exposure. Other imaging techniques like MRI, PET scans, and ultrasounds have different functions and safety profiles.
Step-by-step explanation:
If a doctor has requested a CT scan of a patient's head, the process would typically start with the Radiology section of a hospital or imaging center. A CT scan, or computerized tomography scan, utilizes X-rays to take multiple images of the head, which a computer then uses to construct detailed cross-sectional images. These images appear as successive transverse sections, allowing physicians to diagnose conditions such as tumors or brain atrophy.
It's important to note that people consider the potential risks when deciding to undergo a CT scan. One of these risks includes exposure to radiation, which can potentially lead to the formation of cancerous cells. However, the detailed information provided by a CT scan often outweighs the potential risks, especially when other diagnostic tests may not provide as clear images for certain conditions.
When comparing various medical imaging techniques, each has its unique function and use in medicine. For instance, an MRI uses a magnetic field to create images, PET scans utilize radiopharmaceuticals to highlight physiologic activity, while ultrasounds utilize sound waves and are often used during pregnancies due to their safety profile as they don't use ionizing radiation. All these techniques, alongside CT scans, provide valuable information to physicians, facilitating better diagnosis and treatment planning.