What does the term Views per Rotation (VPR) represent?

The term Views per Rotation (VPR) specifically refers to the number of distinct projection images acquired during a complete rotation of the CT scanner's gantry. This metric is significant because it directly influences the amount of data collected and affects the overall image quality and reconstruction process in computed tomography.

In CT imaging, as the gantry rotates around the patient, it captures multiple views (or angles) of the body's internal structures. The higher the VPR, the more projection data is available for the reconstruction algorithms to create high-resolution images. Therefore, it is essential in optimizing imaging performance, especially in dynamic studies or when imaging complex anatomical areas.

Understanding VPR is crucial for CT technologists as it plays a vital role in determining the scan protocol and impacts factors such as radiation dose and scan time. For instance, increased views can improve image quality but may also extend the scanning duration or influence the patient’s exposure to radiation if not managed correctly.