Which scans are commonly performed using a converging collimator?

A converging collimator is designed to focus the emitted gamma rays from a specific region of interest, which helps to improve image resolution and reduce scatter. This is especially beneficial in applications where detail is crucial, such as brain scans.

In brain imaging, the small structures and subtle abnormalities can be challenging to resolve. A converging collimator enhances the detection of these intricate details, resulting in clearer images that assist in diagnosing various conditions affecting the brain. This technique is particularly useful for examining cerebral blood flow and neuronal activity.

Other types of scans, such as those for the thyroid, heart, and liver, typically employ parallel hole or diverging collimators for their specific imaging requirements. These collimators are designed to optimize sensitivity and resolution for larger structures, which is not the primary focus for brain scans that require high-resolution imaging of smaller areas.