Final answer:
An X-ray image of the bladder is called a cystogram, a test used to visualize the urinary bladder and investigate certain urinary issues. The correct option is 3.
Step-by-step explanation:
The medical term for an X-ray image of the bladder is a cystogram. A cystogram is a diagnostic imaging test that uses X-rays to visualize the urinary bladder. It's often used to investigate issues such as frequent urinary tract infections, bladder dysfunction, or to locate injuries to the bladder.
Not to be confused with a cystoscope, which is an instrument used to view the inside of the bladder directly, or a nephroscope, which is used to view the kidneys.
A nephrotomogram is a sectional X-ray image of the kidney, while a pyelogram is an imaging test that uses X-rays to look at the renal pelvis and ureters. Option 3. is the correct one.