Radiology Key

Fig. 15.1 Normal anatomy of the pelvic floor and anal sphincters. The levator ani (lev ani) muscles blend with the puborectalis (pr) which in turn merges with the circular external…

Fig. 20.1 Graphical illustration of the prostate in relation to the other male pelvic organs. The prostate encases the proximal urethra (prostatic urethra) and is intimately bound to the bladder…

Fig. 14.1 Sagittal T2-weighted sequence shows annular, mid rectal tumor (arrows), which is seen at 8 cm from the anal verge. Sagittal sequences are very useful for assessing the site…

Fig. 31.1 Schematic of relationship of attenuation of iodine (y-axis) to photon energy (x-axis). Note peak in attenuation that occurs at 33.2 keV, the k-edge of iodine. The k-edge of…

Algorithm 13.1 Algorithmic approach for evaluation of the appendix Normal Appendix A useful landmark for identifying the appendix at CT is the fatty ileocecal valve (Fig. 13.1). When trying to identify…

Causes of cirrhosis Hepatitis C (55 %) Hepatitis B (16 %) Alcohol (13 %) Cryptogenic nonalcoholic fatty liver disease and nonalcoholic steatohepatitis (16 %) Other causes: hereditary hemochromatosis, constrictive pericarditis,…

Algorithm 11.1 Risk of Adenoma to Carcinoma” [3–7] Hence, the success of any diagnostic test as a colorectal cancer screening tool lies in its ability to accurately diagnose polyps measuring 1…

Fig. 4.1 A 64-year-old male with unresectable HCC. The segment II lesion (arrow) demonstrates hyperenhancement on the contrast-enhanced gradient echo MRI images before treatment (a). Immediately after administration of radioembolization…

Fig. 1.1 Axial non-contrast CT image shows that the liver measures 10 HU less than the spleen secondary to fatty infiltration The abnormal hepatic accumulation of copper, glycogen, or iron…