Final answer:
The C-arm provides real-time imaging with 3D navigation during spinal surgery, and it is crucial for precise placement of surgical instruments.
Step-by-step explanation:
The imaging technique that provides real-time imaging with 3D navigation during spinal surgery is known as a C-arm. This device is capable of offering fluoroscopic intraoperative imaging, which is essential for the precise placement of instrumentation in spinal procedures. Unlike static imaging techniques, the C-arm provides continuous, live images, which enables surgeons to navigate in three dimensions while operating.
Ultrasounds are the safest imaging technique during pregnancy because they do not use ionizing radiation. CT scans, PET scans, and X-rays are less preferred due to their use of radiation.
For the safety of imaging studies during pregnancy, ultrasounds are considered the safest option. Ultrasounds do not use ionizing radiation, which makes them a preferred choice for monitoring the health of a developing fetus. CT scans, PET scans, and X-rays involve varying degrees of electromagnetic radiation and are generally used more cautiously during pregnancy.