Which vessel is most likely assessed using the temporal window in TCD?

The temporal window is an important entry point for performing transcranial Doppler (TCD) ultrasound assessments, particularly for evaluating the middle cerebral artery. This location allows for optimal visualization and assessment of blood flow in the middle cerebral artery due to its anatomical position.

Transcranial Doppler relies on the ability to penetrate through the skull, and the temporal window is one of the few accessible areas on the skull where the bone is thinner and the major vessels, like the middle cerebral artery, can be reliably evaluated. In addition to its accessibility, the middle cerebral artery is a key vessel that often serves as a focus for assessing conditions such as stroke, vasospasm, and other cerebrovascular diseases.

While other vessels like the anterior cerebral artery, posterior cerebral artery, and basilar artery are important for overall cerebral circulation and can be assessed using different windows or methods, they are not typically evaluated using the temporal window in TCD. The unique anatomy and blood flow patterns associated with the middle cerebral artery make it the primary target for assessment through this approach.