article_snippet.sent: A finger-width flexible tube called an endobronchial ultrasound (EBUS) allows doctors to see inside the lungs for cancer and take a tissue sample in one go.
article_snippet.sent: An ultrasound scanner attached to one end of A finger-width flexible tube takes a scan while a small needle takes a tissue sample.
article_snippet.sent: By comparison, the EBUS allows doctors to look directly into the windpipe and breathing tubes, while the ultrasound scanner can check the lymph glands in the centre of the chest for cancer.