Bladder shot - An AP projection of the bladder is often requested if the patient is too long to fit on a 14x17 LW to demonstrate the kidneys, ureters, and bladder on one film. Additionally, this radiograph is used during cystography and cystourethrography to demonstrate any anatomical anomalies or pathologic conditions of the bladder. A small cassette is used, either 10x12 LW or a 9x9. Check for rotation by palpating the ASIS and determining that they are equidistant from the table. This will be approximately halfway between the ASIS and symphysis on most patients.
Exposure is made on exhalation.
All of the symphysis pubis must be included or there is the possibility to clip pertinent anatomy or pathology. It may help to completely extend that leg to keep it out of the collimated field. Here's some pathology radiographs - just click.