CT and MRI anatomy of the rectum; imaging landmarks

CT and MRI landmarks of rectal and anorectal anatomy guide staging and surgical planning.

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Overview

Description

Imaging anatomy of the rectum, sigmoid junction, anal canal, sphincter complex, rectal wall, and pelvic floor establishes the anatomical framework. The peritoneal reflection, mesorectal fascia, vascular anatomy, and lymph-node stations are emphasised for total mesorectal excision, tumour staging, and patient management.

Learning Objectives

Identify the rectum, anal canal, sphincter complex, and pelvic floor on CT and MRI.
Recognise the mesorectal fascia, peritoneal reflection, and vascular landmarks relevant to surgery.
Relate rectal wall and lymph-node anatomy to local tumour staging and management.
Compare the roles of CT and MRI in depicting rectal anatomy and imaging landmarks.

Topics Covered

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00:01 - Introduction to Webinar on CT and MRI Anatomy of the Rectum

00:19 - Objectives of the Lecture on Rectal Anatomy

00:54 - Understanding the Complex Relationship of Rectal Anatomy

01:56 - Significance of Total Mesorectal Excision

04:12 - Imaging Techniques for Anorectal Area: CT vs MRI

07:07 - Critical Importance of Precise Rectal Definition

11:03 - Detailed Definition Issues of Rectum and Sigmoid Junction

24:20 - Exploring the Relationship Between Rectum and Anal Canal

31:30 - Understanding the Sphincter Complex in Rectal Surgery

36:40 - Evaluating Rectal Wall Structure for Tumor Staging

41:02 - Role of Peritoneal Reflection in Rectal Surgery

46:50 - Mesorectal Fascia as a Key Surgical Landmark

49:50 - The Importance of Rectal Vascularization and its Implications

45:56 - Assessing Lymph Nodes in Rectal Imaging

47:40 - Considerations on Pelvic Floor Anatomy and Surgery

51:04 - Conclusion and the Role of Imaging in Patient Management

Lecturers

Roberto Garcia Figueiras^{M.D. Ph.D.}

Santiago de Compostela, Spain

Head of Radiodiagnosis University Hospital Complex of Santiago de Compostela

Dr. Garcia Figueiras has focused his work on Oncology Imaging and functional and molecular imaging techniques and their application to different tumour types (colorectal, renal, prostate and pancreatic cancer) and oncological therapies (immunotherapy and target therapies). Doctoral thesis (Cum Laude and extraordinary award) Multiple papers in national and international congresses, 16 book chapters and 75 published articles devoted primarily to Oncology Imaging. He has obtained 21 awards from different scientific societies, including RSNA, ECR, ESGAR, ESUR, ESTI, SERAM or SGR. He is a speaker at the main radiological congresses (RSNA, ECR, ESGAR, ESUR, SERAM, SEDIA, SEICAT) and in multiple radiological courses and medical specialties dedicated to the oncological field. He is currently the head of the Radiodiagnosis service at the Hospital Clínico Universitario de Santiago de Compostela since 2016.

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