Which imaging technique does NOT show anatomy directly?

Nuclear Scintigraphy is the correct choice because it is a functional imaging technique that assesses metabolic processes in the body rather than displaying anatomical structures directly. This method involves the injection of a small amount of radioactive material, which is taken up by certain tissues depending on their metabolic activity. It provides information on how well organs are functioning, rather than providing a detailed view of the body's anatomy.

In contrast, other imaging techniques like A-mode (a form of ultrasound used to measure distances), endoscopy (providing direct visualization of internal structures using a flexible tube with a camera), and Magnetic Resonance Imaging (MRI, which provides highly detailed images of soft tissues) all display anatomical details directly. Understanding these distinctions between functional and anatomical imaging can clarify the role each technique plays in diagnostic imaging and patient care.