Imaging Is Now Central To The Investigation And Management Of Anorectal And Pelvic Floor Disorders. This Has Been Brought About By Technical Developments In Imaging, Notably, Three-dimensional Ultrasound And Magnetic Resonance Imaging (mri), Which Allow High Anatomical Resolution And Tissue Differentiation To Be Presented In A Most Usable Fashion. Three-dimensional Endosonography In Anorectal Conditions And Mri In Anal Fistula Are Two Obvious Developments, But There Are Others, With Dynamic St- Ies Of The Pelvic Floor Using Both Ultrasound And Mri Coming To The Fore. This Atlas Provides An Easy Way To Gain A Detailed Understanding Of Imaging In This Field. The Atlas Is Divided Into Four Sections Covering The Basic Anatomy, Anal/perianal Disease, Rectal/perirectal Disease And Functional Assessment. One Of The Difficulties With Developing An Atlas Is To Strike The Right Balance - Tween Text And Images. Too Much Text And It Is Not An Atlas; Too Little Text And The - Ages May Not Be Understood. The Editors Of This Atlas Are To Be Congratulated On Achi- Ing An Appropriate Balance. The Images Are All That One Expects From An Atlas, And The Diagrams Are Excellent. The Commentaries At The End Of Invited Chapters Are A Valuable Addition, Placing What Are Relatively Short, Focussed Chapters Into Context. They Add Balance And Depth To The Work And Are Well Worth Reading.