Ureteral compression may be applied to delay filling of the ureters and bladder, thus allowing complete visualization of the pelvis and calyces. Do not leave a patient with compression in place unattended. Injury may result if the patient moves or trys to roll off of the table. So, to demonstrate the right kidney without distortion, an LPO position is required. The patient should be positioned in a 30 degree semi-supine oblique position.
Exposure is made at the end of exhalation.
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.