Radiology of colorectal cancer

Area of Science:

• Radiology
• Oncology
• Medical Imaging

Background:

• Colorectal cancer imaging has evolved over two decades.
• Traditional barium enema is being replaced by advanced techniques.

Purpose of the Study:

• To review the evolution of colorectal cancer imaging.
• To highlight current and emerging imaging modalities.
• To discuss image-guided treatments for liver metastases.

Main Methods:

• Review of advanced imaging modalities including MRI, PET, and virtual colonoscopy.
• Discussion of transrectal ultrasound for rectal cancer.
• Overview of image fusion techniques (CT/MRI with PET).

Main Results:

• MRI and transrectal ultrasound are preferred for primary rectal cancers.
• Barium enema remains common for colonic cancers.
• Virtual colonoscopy shows promise for screening and difficult cases.
• PET is crucial for detecting tumor recurrence.
• Image fusion techniques are under development.
• Radio-frequency ablation is an established image-guided treatment for liver metastases.

Conclusions:

• Colorectal cancer imaging has seen substantial technological advancement.
• Emerging technologies like virtual colonoscopy and image fusion are poised to further transform the field.
• Minimally invasive, image-guided treatments are now integral to managing colorectal cancer, particularly liver metastases.