Final answer:
Increasing the phase matrix in medical imaging impacts scan time by improving image resolution but increasing scanning time.
Step-by-step explanation:
Increasing the phase matrix in medical imaging can impact scan time. The phase matrix is a mathematical representation used in magnetic resonance imaging (MRI) to create images of the body. By increasing the phase matrix, the MRI scanner collects more data points, which leads to higher image resolution. However, this also results in longer scan times because the scanner needs to acquire and process a larger amount of data.