M R I O f H e a r t referred to as magnetic resonance tomograph y (MRT) or, in chemistry, nuclear Magnetic resonance (NMR), is a method used to render images of the inside of an object.

CT of heart This is a CT scan showing the top heart. Computed tomography (CT), is a medical imaging method employing tomography where digital geometry processing is used to generate a three dimensional images of the internals of an object from a large series of two- dimensional X- ray images taken around a single axis of rotation.

Nuclear Medicine Nuclear medicine is a branch of medicine and medical imaging that uses the nuclear properties of matter in diagnosis and therapy This is a nuclear medicine scan of the heart

Ultrasou nd ultrasound -based diagnostic medical imaging techniqu e used to visualize muscles, tendons, and many internal organs, their size, structure This is a ultrasound of the heart. You can Almost see the four chambers.

Circulation through lungs Red : good blood Blue : used blood

Pulmonary Vein The pulmonar y veins carry oxygen- rich blood from the lungs to the left atrium of the heart.