| anteroposterior | 1. Relating to both front and rear. 2. In X-ray imaging, describing the direction of the beam through the patient from anterior to posterior, e.g., an A-P view of the abdomen. (05 Mar 2000) |
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| anteroposterior diameter of the pelvic inlet | Distance from the promontory of the sacrum to the upper posterior edge of the pubic symphysis. Synonym: anteroposterior diameter of the pelvic inlet, conjugata vera, conjugate axis, conjugate diameter of pelvic inlet, diameter mediana, internal conjugate, true conjugate. (05 Mar 2000) |
| anteroposterior projection | The alternative frontal radiographic projection, used mainly in bedside or portable radiography. Synonym: anteroposterior projection. (05 Mar 2000) |