PA and AP in medical imaging stand for posterior anterior and anterior posterior.
In medical imaging, for example, when taking a chest radiograph:
AP is the abbreviation for anterior posterio, which refers to the anterior-posterior position of the chest radiograph. lateral chest radiographs are in the lateral position, whereas pa is facing the plate with the back to the bulbous tube; and ap is the back to the plate facing the bulbous tube. Most chest radiographs are posterior-anterior, meaning that the patient faces the cassette and the x-ray beam enters the patient's back, passes through the chest cavity, exits through the anterior chest wall, and reaches the film. Anteroposterior chest films are taken with the patient facing the box in the opposite direction.
Note: Medical imaging is the technology and process of obtaining images of internal tissues of the human body or a part of the human body in a non-invasive manner for the purpose of medical treatment or medical research. It consists of two relatively independent research directions: medical imaging system and medical image processing.
Expanded Information:
Applications of Medical Imaging Technology:
As a science, medical imaging belongs to bioimaging and encompasses diagnostic imaging, radiology, endoscopy, thermal imaging for medical purposes, medical photography and microscopy. In addition, techniques such as brainwave mapping and magnetoencephalography, which focus on measurement and recording without image presentation, can be considered as another form of medical imaging because of the localization properties of the data produced.
In terms of clinical applications, medical imaging is used in medical imaging, and some hospitals have imaging centers, imaging departments, or medical imaging departments with relevant equipment and specialized nursing staff, radiographers, and physicians to operate the equipment and interpret and diagnose the images, which is different from radiology departments that are responsible for radiation therapy.
In medicine, medical engineering, medical physics, and biomedical informatics, medical imaging generally refers to the science of image composition, acquisition and storage techniques, and instrumentation research and development. The study of how medical images are read, interpreted and diagnosed belongs to the department of radiology, or a complementary science to other fields of medicine.
Baidu Encyclopedia-Medical Imaging