How does Ted Kooser use imagery in At the Cancer Clinic?

In some places, this poem conveys its ideas with abstract terms, as when the narrator describes the sick woman and her helpers as having "the straight, tough bearing of courage." Words like these do not represent the physical world with objects that readers can understand experiencing with their five senses. More often, At the Cancer Clinic conveys its ideas by presenting concrete images. A concrete image is one that appeals to the reader's sense of smell, taste, touch, sight, or sound.