One challenging case involved a patient with severe claustrophobia. I had to calm the patient by explaining the procedure in detail and allowing them to see the machine before starting. I also positioned them in a way that minimized their anxiety and used a smaller bore scanner. Throughout the scan, I maintained constant communication to reassure them, which helped complete the procedure successfully.

Patient safety is paramount. I always verify the patient's identity and the correct procedure using two patient identifiers. I ensure all necessary precautions are taken, such as removing metal objects and providing lead shielding for sensitive areas. I also monitor the patient's condition throughout the scan and have emergency protocols in place in case of any adverse reactions.

To minimize radiation exposure, I use the lowest possible dose while maintaining diagnostic image quality. I adjust the scan parameters based on the patient's size and the specific area being scanned. I also use advanced techniques like iterative reconstruction and dose-saving protocols. Additionally, I ensure that the scan is clinically justified and that no unnecessary scans are performed.

If a patient is unable to hold still, I first try to identify the cause, such as discomfort or anxiety. I address these issues by adjusting their position, providing support, and offering reassurance. If necessary, I may use sedation under the guidance of a physician. In some cases, I might need to reschedule the scan for a time when the patient is more likely to be able to remain still.

Proper image reconstruction is crucial for accurate diagnosis. It involves using advanced algorithms to process raw data into clear, detailed images. This process can significantly affect the quality of the images, which in turn impacts the radiologist's ability to make an accurate diagnosis. I ensure that I use the appropriate reconstruction techniques and parameters for each specific scan to achieve the best possible image quality.