A rigid scan is a pressure device that consists of a collector for data and two rings. The patient should put the rings in the upper and lower part of his penis. The scan will read the blood pressure of the patient during the night and the ring will contract or expand depending on the penis activity during the night. This helps the specialist to determine if the circulation in the penis is normal.


Dynamic infusion cavernosometry is a technique in which fluid is pumped into the penis at a known rate and pressure. It gives a measurement of the vascular pressure in the corpus cavernosum during an erection. The cavernosography is an adjunct to this procedure, where a contrast material is injected and then it is x-rayed to visualize any leakage.


Both tests are related to the circulation in the penis and the condition of the penile blood vessels. However, there might be other causes for erectile dysfunction which might be unrelated to circulation. Neurological problems might cause impotence if the nerves responsible for erection are damaged. A hormonal imbalance (especially low levels of testosterone) might be responsible for erectile dysfunction, too. In the end, psychological causes might include depression or anxiety.


You might want to visit a urologist to detect if and what physical issues might have caused the erectile dysfunction. Reference to a neurologist or endocrinologist might be needed depending on the suspected cause. If all physical causes are eliminated, then your condition might be caused by a psychological disorder, which might need help from a psychiatrist or psychotherapist.