Читать книгу Anti-Aging Therapeutics Volume XIII - A4M American Academy - Страница 12

An MRI exam shows the extent of cancer but not the activity. In patients successfully treated by radiation or hormones, the abnormality may still persist on the MRI picture; whereas, the Doppler test has the advantage of showing that blood flows are greatly reduced or completely absent. S-MRI is also designed to show activity, but has not been shown to be as sensitive as physicians had hoped. DWI- MRI has not been successful in finding small lesions and EC-MRI has been shown to distort the anatomy by the balloon inflation process. Most MRI fails to show small areas of extracapsular disease. Fortunately, the latest generation of 3D 18 MHz ultrasound probes have a resolution 5-times greater than the MRI and can verify capsule integrity. MRI is used to find spread of the prostate tumor into the boney structures, seminal vesicles, and lymph nodes. It may also confirm extension of malignancy into the rectum.